./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/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 64bit --witnessprinter.graph.data.programhash b9dfe2826dbd43b76a93fbf593c8a07947a4c894 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:59:04,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:59:04,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:59:04,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:59:04,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:59:04,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:59:04,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:59:04,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:59:04,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:59:04,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:59:04,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:59:04,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:59:04,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:59:04,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:59:04,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:59:04,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:59:04,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:59:04,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:59:04,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:59:04,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:59:04,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:59:04,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:59:04,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:59:04,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:59:04,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:59:04,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:59:04,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:59:04,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:59:04,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:59:04,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:59:04,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:59:04,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:59:04,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:59:04,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:59:04,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:59:04,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:59:04,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:59:04,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:59:04,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:59:04,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:59:04,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:59:04,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2020-11-30 01:59:04,768 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:59:04,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:59:04,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:59:04,771 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:59:04,771 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:59:04,771 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:59:04,771 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:59:04,771 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:59:04,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:59:04,772 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:59:04,773 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:59:04,773 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:59:04,773 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:59:04,773 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:59:04,774 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:59:04,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:59:04,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:59:04,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:59:04,775 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:59:04,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:59:04,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:59:04,775 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:59:04,776 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:59:04,776 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:59:04,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:59:04,776 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:59:04,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:59:04,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:59:04,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:59:04,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:59:04,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:59:04,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:59:04,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:59:04,778 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:59:04,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:59:04,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:59:04,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:59:04,779 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_231fa53d-c9ef-4abd-a268-8ac321f8a85a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9dfe2826dbd43b76a93fbf593c8a07947a4c894 [2020-11-30 01:59:05,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:59:05,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:59:05,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:59:05,140 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:59:05,143 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:59:05,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2020-11-30 01:59:05,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/data/fde163eeb/a125d9a7cac54fcfb715d802ff502e82/FLAGe8d8ce32b [2020-11-30 01:59:05,802 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:59:05,803 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2020-11-30 01:59:05,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/data/fde163eeb/a125d9a7cac54fcfb715d802ff502e82/FLAGe8d8ce32b [2020-11-30 01:59:06,177 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/data/fde163eeb/a125d9a7cac54fcfb715d802ff502e82 [2020-11-30 01:59:06,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:59:06,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:59:06,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:59:06,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:59:06,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:59:06,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e4ef517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06, skipping insertion in model container [2020-11-30 01:59:06,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:59:06,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:59:06,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:59:06,444 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:59:06,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:59:06,489 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:59:06,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06 WrapperNode [2020-11-30 01:59:06,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:59:06,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:59:06,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:59:06,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:59:06,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:59:06,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:59:06,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:59:06,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:59:06,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... [2020-11-30 01:59:06,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:59:06,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:59:06,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:59:06,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:59:06,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:59:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:59:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:59:06,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:59:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:59:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:59:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:59:07,237 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:59:07,238 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 01:59:07,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:59:07 BoogieIcfgContainer [2020-11-30 01:59:07,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:59:07,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:59:07,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:59:07,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:59:07,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:59:06" (1/3) ... [2020-11-30 01:59:07,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb60a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:59:07, skipping insertion in model container [2020-11-30 01:59:07,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:06" (2/3) ... [2020-11-30 01:59:07,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb60a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:59:07, skipping insertion in model container [2020-11-30 01:59:07,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:59:07" (3/3) ... [2020-11-30 01:59:07,250 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2020-11-30 01:59:07,262 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:59:07,267 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-11-30 01:59:07,279 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-11-30 01:59:07,308 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:59:07,308 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:59:07,309 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:59:07,309 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:59:07,309 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:59:07,309 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:59:07,310 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:59:07,310 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:59:07,323 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-30 01:59:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:59:07,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:07,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:59:07,331 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash 88734, now seen corresponding path program 1 times [2020-11-30 01:59:07,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:07,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559147825] [2020-11-30 01:59:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:07,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559147825] [2020-11-30 01:59:07,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:07,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:59:07,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333503495] [2020-11-30 01:59:07,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:59:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:59:07,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:59:07,535 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-11-30 01:59:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:07,636 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-11-30 01:59:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:59:07,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 01:59:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:07,645 INFO L225 Difference]: With dead ends: 18 [2020-11-30 01:59:07,647 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:59:07,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:59:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:59:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 01:59:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:59:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-30 01:59:07,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 3 [2020-11-30 01:59:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:07,692 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-30 01:59:07,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:59:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-30 01:59:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:59:07,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:07,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:59:07,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:59:07,694 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash 88735, now seen corresponding path program 1 times [2020-11-30 01:59:07,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:07,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126756703] [2020-11-30 01:59:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:07,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126756703] [2020-11-30 01:59:07,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:07,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:59:07,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818655266] [2020-11-30 01:59:07,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:59:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:59:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:59:07,808 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-11-30 01:59:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:07,866 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-30 01:59:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:59:07,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 01:59:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:07,868 INFO L225 Difference]: With dead ends: 19 [2020-11-30 01:59:07,868 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 01:59:07,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:59:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 01:59:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-30 01:59:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 01:59:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-30 01:59:07,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 3 [2020-11-30 01:59:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:07,873 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-30 01:59:07,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:59:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-30 01:59:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:59:07,874 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:07,874 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-30 01:59:07,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:59:07,875 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash 85326552, now seen corresponding path program 1 times [2020-11-30 01:59:07,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:07,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647338891] [2020-11-30 01:59:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:08,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647338891] [2020-11-30 01:59:08,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838406957] [2020-11-30 01:59:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:59:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:08,123 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-30 01:59:08,123 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:59:08,137 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:59:08,138 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:59:08,138 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-30 01:59:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:08,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:08,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [917902340] [2020-11-30 01:59:08,215 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-30 01:59:08,216 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:08,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:08,224 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:08,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:08,756 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:08,872 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-11-30 01:59:09,175 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-11-30 01:59:09,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:59:09,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:09,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-30 01:59:09,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981476135] [2020-11-30 01:59:09,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:59:09,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:59:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:59:09,180 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2020-11-30 01:59:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:09,340 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-11-30 01:59:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:59:09,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-11-30 01:59:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:09,342 INFO L225 Difference]: With dead ends: 47 [2020-11-30 01:59:09,342 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 01:59:09,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:59:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 01:59:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2020-11-30 01:59:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:59:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-11-30 01:59:09,347 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 5 [2020-11-30 01:59:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:09,348 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-11-30 01:59:09,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:59:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-11-30 01:59:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:59:09,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:09,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-11-30 01:59:09,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:59:09,549 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:09,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:09,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1149568740, now seen corresponding path program 1 times [2020-11-30 01:59:09,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:09,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765648679] [2020-11-30 01:59:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:59:09,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765648679] [2020-11-30 01:59:09,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:09,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:59:09,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987382937] [2020-11-30 01:59:09,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:59:09,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:09,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:59:09,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:59:09,624 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2020-11-30 01:59:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:09,669 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-30 01:59:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:59:09,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-30 01:59:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:09,672 INFO L225 Difference]: With dead ends: 33 [2020-11-30 01:59:09,672 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:59:09,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:59:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:59:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-30 01:59:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 01:59:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-11-30 01:59:09,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 9 [2020-11-30 01:59:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:09,677 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-11-30 01:59:09,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:59:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-11-30 01:59:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:59:09,681 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:09,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:09,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-30 01:59:09,682 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash 929151335, now seen corresponding path program 1 times [2020-11-30 01:59:09,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:09,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360160952] [2020-11-30 01:59:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:59:09,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360160952] [2020-11-30 01:59:09,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:09,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:59:09,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541616544] [2020-11-30 01:59:09,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:59:09,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:09,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:59:09,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:59:09,734 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-11-30 01:59:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:09,789 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-11-30 01:59:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:59:09,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-30 01:59:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:09,792 INFO L225 Difference]: With dead ends: 35 [2020-11-30 01:59:09,792 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 01:59:09,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:59:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 01:59:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-11-30 01:59:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 01:59:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-30 01:59:09,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 11 [2020-11-30 01:59:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:09,797 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-30 01:59:09,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:59:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-30 01:59:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:59:09,797 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:09,800 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-11-30 01:59:09,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-30 01:59:09,801 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:09,801 INFO L82 PathProgramCache]: Analyzing trace with hash -691331581, now seen corresponding path program 2 times [2020-11-30 01:59:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:09,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901806117] [2020-11-30 01:59:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:09,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901806117] [2020-11-30 01:59:09,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:09,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 01:59:09,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839254474] [2020-11-30 01:59:09,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:59:09,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:59:09,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:59:09,968 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 8 states. [2020-11-30 01:59:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:10,041 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-11-30 01:59:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:59:10,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-30 01:59:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:10,043 INFO L225 Difference]: With dead ends: 31 [2020-11-30 01:59:10,043 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 01:59:10,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:59:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 01:59:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-11-30 01:59:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 01:59:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-11-30 01:59:10,047 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2020-11-30 01:59:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:10,047 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-11-30 01:59:10,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:59:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-11-30 01:59:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:59:10,048 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:10,048 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:10,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-30 01:59:10,048 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:10,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1265835680, now seen corresponding path program 1 times [2020-11-30 01:59:10,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:10,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157594887] [2020-11-30 01:59:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:10,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157594887] [2020-11-30 01:59:10,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242060072] [2020-11-30 01:59:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:10,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:59:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:10,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:10,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916604202] [2020-11-30 01:59:10,234 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 01:59:10,234 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:10,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:10,235 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:10,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:10,582 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:11,055 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-11-30 01:59:11,213 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:59:11,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:11,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-11-30 01:59:11,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891805262] [2020-11-30 01:59:11,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:59:11,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:11,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:59:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:59:11,216 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-11-30 01:59:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:11,254 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-11-30 01:59:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:59:11,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-30 01:59:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:11,255 INFO L225 Difference]: With dead ends: 34 [2020-11-30 01:59:11,255 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 01:59:11,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:59:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 01:59:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-30 01:59:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:59:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 01:59:11,260 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2020-11-30 01:59:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:11,260 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 01:59:11,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:59:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 01:59:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:59:11,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:11,261 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:11,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:11,462 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:11,463 INFO L82 PathProgramCache]: Analyzing trace with hash -843141508, now seen corresponding path program 2 times [2020-11-30 01:59:11,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:11,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113980538] [2020-11-30 01:59:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:11,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113980538] [2020-11-30 01:59:11,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725312603] [2020-11-30 01:59:11,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:11,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-30 01:59:11,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:59:11,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:59:11,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 01:59:11,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-30 01:59:11,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:59:11,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-11-30 01:59:11,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722362537] [2020-11-30 01:59:11,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:59:11,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:59:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:59:11,751 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-11-30 01:59:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:11,801 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-30 01:59:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:59:11,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-30 01:59:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:11,802 INFO L225 Difference]: With dead ends: 33 [2020-11-30 01:59:11,803 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 01:59:11,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:59:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 01:59:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-30 01:59:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:59:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-30 01:59:11,810 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2020-11-30 01:59:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:11,810 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-30 01:59:11,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:59:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-30 01:59:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:59:11,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:11,812 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:12,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-30 01:59:12,022 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1491197133, now seen corresponding path program 1 times [2020-11-30 01:59:12,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:12,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072963738] [2020-11-30 01:59:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 01:59:12,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072963738] [2020-11-30 01:59:12,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941997079] [2020-11-30 01:59:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/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 [2020-11-30 01:59:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:59:12,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 01:59:12,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 01:59:12,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062036737] [2020-11-30 01:59:12,322 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:59:12,322 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:12,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:12,323 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:12,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:12,668 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:13,094 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2020-11-30 01:59:13,360 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:59:13,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:13,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2020-11-30 01:59:13,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061906902] [2020-11-30 01:59:13,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 01:59:13,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:13,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 01:59:13,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:59:13,362 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 16 states. [2020-11-30 01:59:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:13,463 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-11-30 01:59:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 01:59:13,467 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-11-30 01:59:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:13,468 INFO L225 Difference]: With dead ends: 47 [2020-11-30 01:59:13,468 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 01:59:13,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:59:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 01:59:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-30 01:59:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-30 01:59:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-11-30 01:59:13,488 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 22 [2020-11-30 01:59:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:13,489 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-11-30 01:59:13,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 01:59:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-11-30 01:59:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-30 01:59:13,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:13,490 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:13,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-30 01:59:13,706 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:59:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1389769989, now seen corresponding path program 2 times [2020-11-30 01:59:13,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:13,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222289049] [2020-11-30 01:59:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 01:59:14,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222289049] [2020-11-30 01:59:14,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902129201] [2020-11-30 01:59:14,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:14,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 01:59:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:59:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:59:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-11-30 01:59:14,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-11-30 01:59:14,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:59:14,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 4] total 24 [2020-11-30 01:59:14,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780258328] [2020-11-30 01:59:14,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:59:14,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:59:14,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:59:14,411 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2020-11-30 01:59:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:14,528 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-11-30 01:59:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:59:14,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-11-30 01:59:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:14,529 INFO L225 Difference]: With dead ends: 47 [2020-11-30 01:59:14,529 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:59:14,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:59:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:59:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:59:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:59:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:59:14,530 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-11-30 01:59:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:14,530 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:59:14,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:59:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:59:14,531 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:59:14,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-11-30 01:59:14,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:59:14 BoogieIcfgContainer [2020-11-30 01:59:14,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:59:14,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:59:14,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:59:14,736 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:59:14,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:59:07" (3/4) ... [2020-11-30 01:59:14,740 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:59:14,760 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-30 01:59:14,767 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-30 01:59:14,768 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 01:59:14,802 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_231fa53d-c9ef-4abd-a268-8ac321f8a85a/bin/utaipan/witness.graphml [2020-11-30 01:59:14,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:59:14,803 INFO L168 Benchmark]: Toolchain (without parser) took 8621.59 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 71.5 MB in the beginning and 103.3 MB in the end (delta: -31.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:59:14,804 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 75.5 MB. Free memory was 35.8 MB in the beginning and 35.8 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:59:14,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.02 ms. Allocated memory is still 102.8 MB. Free memory was 71.5 MB in the beginning and 79.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:59:14,805 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.20 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 78.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:59:14,805 INFO L168 Benchmark]: Boogie Preprocessor took 47.29 ms. Allocated memory is still 102.8 MB. Free memory was 78.3 MB in the beginning and 77.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:59:14,805 INFO L168 Benchmark]: RCFGBuilder took 657.13 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 59.1 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:59:14,806 INFO L168 Benchmark]: TraceAbstraction took 7493.27 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 58.7 MB in the beginning and 106.1 MB in the end (delta: -47.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:59:14,806 INFO L168 Benchmark]: Witness Printer took 66.61 ms. Allocated memory is still 148.9 MB. Free memory was 106.1 MB in the beginning and 103.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:59:14,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 75.5 MB. Free memory was 35.8 MB in the beginning and 35.8 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.02 ms. Allocated memory is still 102.8 MB. Free memory was 71.5 MB in the beginning and 79.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.20 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 78.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.29 ms. Allocated memory is still 102.8 MB. Free memory was 78.3 MB in the beginning and 77.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 657.13 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 59.1 MB in the end (delta: 18.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7493.27 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 58.7 MB in the beginning and 106.1 MB in the end (delta: -47.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 66.61 ms. Allocated memory is still 148.9 MB. Free memory was 106.1 MB in the beginning and 103.3 MB in the end (delta: 2.8 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: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.4s, OverallIterations: 10, TraceHistogramMax: 14, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 209 SDslu, 158 SDs, 0 SdLazy, 264 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 182 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 231 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 308 ConstructedInterpolants, 1 QuantifiedInterpolants, 76362 SizeOfPredicates, 3 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 507/868 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...