./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:11:58,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:11:58,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:11:58,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:11:58,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:11:58,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:11:58,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:11:58,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:11:58,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:11:58,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:11:58,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:11:58,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:11:58,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:11:58,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:11:58,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:11:58,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:11:58,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:11:58,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:11:58,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:11:58,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:11:58,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:11:58,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:11:58,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:11:58,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:11:58,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:11:58,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:11:58,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:11:58,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:11:58,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:11:58,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:11:58,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:11:58,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:11:58,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:11:58,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:11:58,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:11:58,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:11:58,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:11:58,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:11:58,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:11:58,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:11:58,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:11:58,711 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:11:58,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:11:58,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:11:58,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:11:58,759 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:11:58,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:11:58,760 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:11:58,760 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:11:58,760 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:11:58,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:11:58,761 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:11:58,762 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:11:58,762 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:11:58,763 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:11:58,763 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:11:58,763 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:11:58,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:11:58,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:11:58,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:11:58,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:11:58,765 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:11:58,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:11:58,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:11:58,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:11:58,766 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:11:58,766 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:11:58,766 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:11:58,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:11:58,769 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:11:58,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:11:58,769 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:11:58,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:11:58,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:11:58,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:11:58,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:11:58,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:11:58,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:11:58,771 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:11:58,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:11:58,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:11:58,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:11:58,775 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_679f08af-94a1-4214-8938-6f2cb26a5aa3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2020-11-30 02:11:59,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:11:59,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:11:59,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:11:59,076 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:11:59,077 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:11:59,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-11-30 02:11:59,148 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/data/30fe3a006/f930bdb698da432ca96981cd70105376/FLAG6c89f0082 [2020-11-30 02:11:59,622 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:11:59,622 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2020-11-30 02:11:59,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/data/30fe3a006/f930bdb698da432ca96981cd70105376/FLAG6c89f0082 [2020-11-30 02:12:00,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/data/30fe3a006/f930bdb698da432ca96981cd70105376 [2020-11-30 02:12:00,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:12:00,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:12:00,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:12:00,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:12:00,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:12:00,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df2096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00, skipping insertion in model container [2020-11-30 02:12:00,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:12:00,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:12:00,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:12:00,232 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:12:00,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:12:00,261 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:12:00,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00 WrapperNode [2020-11-30 02:12:00,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:12:00,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:12:00,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:12:00,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:12:00,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:12:00,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:12:00,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:12:00,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:12:00,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... [2020-11-30 02:12:00,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:12:00,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:12:00,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:12:00,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:12:00,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/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 02:12:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:12:00,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:12:00,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:12:00,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:12:00,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:12:00,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:12:00,910 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:12:00,910 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:12:00,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:12:00 BoogieIcfgContainer [2020-11-30 02:12:00,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:12:00,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:12:00,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:12:00,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:12:00,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:12:00" (1/3) ... [2020-11-30 02:12:00,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d7f6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:12:00, skipping insertion in model container [2020-11-30 02:12:00,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:12:00" (2/3) ... [2020-11-30 02:12:00,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d7f6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:12:00, skipping insertion in model container [2020-11-30 02:12:00,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:12:00" (3/3) ... [2020-11-30 02:12:00,921 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2020-11-30 02:12:00,937 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:12:00,946 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-30 02:12:00,958 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-30 02:12:00,984 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:12:00,985 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:12:00,985 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:12:00,985 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:12:00,986 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:12:00,986 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:12:00,986 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:12:00,986 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:12:01,001 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-30 02:12:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:12:01,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:01,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:12:01,015 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2020-11-30 02:12:01,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:01,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484551227] [2020-11-30 02:12:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:01,179 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 02:12:01,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484551227] [2020-11-30 02:12:01,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:12:01,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:12:01,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435526287] [2020-11-30 02:12:01,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:12:01,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:12:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:12:01,202 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-11-30 02:12:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:01,267 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-30 02:12:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:12:01,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:12:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:01,277 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:12:01,277 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:12:01,279 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 [2020-11-30 02:12:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:12:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-11-30 02:12:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 02:12:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-30 02:12:01,327 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-30 02:12:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:01,327 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-30 02:12:01,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:12:01,328 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-30 02:12:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:12:01,329 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:01,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:12:01,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:12:01,330 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:01,333 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2020-11-30 02:12:01,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:01,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263004987] [2020-11-30 02:12:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:01,409 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 02:12:01,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263004987] [2020-11-30 02:12:01,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:12:01,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:12:01,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873624902] [2020-11-30 02:12:01,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:12:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:01,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:12:01,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:12:01,414 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-11-30 02:12:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:01,509 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-11-30 02:12:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:12:01,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-30 02:12:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:01,511 INFO L225 Difference]: With dead ends: 45 [2020-11-30 02:12:01,512 INFO L226 Difference]: Without dead ends: 45 [2020-11-30 02:12:01,512 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 02:12:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-30 02:12:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2020-11-30 02:12:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 02:12:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-30 02:12:01,518 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2020-11-30 02:12:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:01,518 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-30 02:12:01,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:12:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-30 02:12:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:12:01,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:01,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:12:01,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:12:01,519 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2020-11-30 02:12:01,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:01,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402552744] [2020-11-30 02:12:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:01,608 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 02:12:01,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402552744] [2020-11-30 02:12:01,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:12:01,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:12:01,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742828597] [2020-11-30 02:12:01,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:12:01,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:01,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:12:01,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:12:01,611 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2020-11-30 02:12:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:01,659 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-30 02:12:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:12:01,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:12:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:01,660 INFO L225 Difference]: With dead ends: 19 [2020-11-30 02:12:01,661 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 02:12:01,661 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 02:12:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 02:12:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-30 02:12:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 02:12:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-30 02:12:01,664 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-11-30 02:12:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:01,665 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-30 02:12:01,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:12:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-30 02:12:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:12:01,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:01,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:12:01,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:12:01,666 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash 3080753, now seen corresponding path program 1 times [2020-11-30 02:12:01,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:01,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576617273] [2020-11-30 02:12:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:01,757 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 02:12:01,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576617273] [2020-11-30 02:12:01,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:12:01,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:12:01,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273397518] [2020-11-30 02:12:01,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:12:01,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:12:01,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:12:01,760 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 3 states. [2020-11-30 02:12:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:01,800 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-11-30 02:12:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:12:01,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:12:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:01,802 INFO L225 Difference]: With dead ends: 20 [2020-11-30 02:12:01,803 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 02:12:01,803 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 02:12:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 02:12:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 02:12:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 02:12:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-30 02:12:01,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-30 02:12:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:01,806 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-30 02:12:01,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:12:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-30 02:12:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:12:01,807 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:01,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:12:01,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:12:01,808 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1585672413, now seen corresponding path program 1 times [2020-11-30 02:12:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:01,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136487140] [2020-11-30 02:12:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:12:01,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136487140] [2020-11-30 02:12:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285548342] [2020-11-30 02:12:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/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 02:12:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:12:01,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:12:02,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:12:02,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [322355605] [2020-11-30 02:12:02,079 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:02,079 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:02,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:02,090 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:02,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:02,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:02,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:02,987 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:03,545 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 70 [2020-11-30 02:12:04,207 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-11-30 02:12:04,680 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2020-11-30 02:12:04,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:04,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-11-30 02:12:04,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713046805] [2020-11-30 02:12:04,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:12:04,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:12:04,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:12:04,684 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-11-30 02:12:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:04,808 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-30 02:12:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:12:04,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 02:12:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:04,809 INFO L225 Difference]: With dead ends: 25 [2020-11-30 02:12:04,809 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:12:04,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:12:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:12:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-30 02:12:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:12:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-30 02:12:04,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-11-30 02:12:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:04,814 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-30 02:12:04,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:12:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-30 02:12:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:12:04,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:04,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 02:12:05,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:05,024 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash 596146973, now seen corresponding path program 1 times [2020-11-30 02:12:05,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:05,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111968473] [2020-11-30 02:12:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:12:05,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111968473] [2020-11-30 02:12:05,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503923594] [2020-11-30 02:12:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/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 02:12:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:05,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:12:05,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:12:05,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:12:05,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391743561] [2020-11-30 02:12:05,256 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:05,256 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:05,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:05,258 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:05,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:05,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:05,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:05,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:06,396 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:06,583 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:12:07,097 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:07,256 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-11-30 02:12:07,449 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:07,614 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-30 02:12:07,797 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-30 02:12:07,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:07,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:07,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-11-30 02:12:07,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962208230] [2020-11-30 02:12:07,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:12:07,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:07,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:12:07,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:12:07,802 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2020-11-30 02:12:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:08,097 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-11-30 02:12:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 02:12:08,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-11-30 02:12:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:08,100 INFO L225 Difference]: With dead ends: 64 [2020-11-30 02:12:08,100 INFO L226 Difference]: Without dead ends: 64 [2020-11-30 02:12:08,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:12:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-30 02:12:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2020-11-30 02:12:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 02:12:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-11-30 02:12:08,108 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2020-11-30 02:12:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:08,108 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-11-30 02:12:08,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:12:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-11-30 02:12:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:12:08,109 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:08,109 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 02:12:08,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:08,310 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:08,311 INFO L82 PathProgramCache]: Analyzing trace with hash 596149066, now seen corresponding path program 1 times [2020-11-30 02:12:08,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:08,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115573037] [2020-11-30 02:12:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115573037] [2020-11-30 02:12:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748263052] [2020-11-30 02:12:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/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 02:12:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:08,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 02:12:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:08,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:08,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405744547] [2020-11-30 02:12:08,652 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:08,652 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:08,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:08,653 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:08,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:08,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:08,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:09,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:09,570 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:09,792 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-11-30 02:12:10,212 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:10,388 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-11-30 02:12:10,611 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:10,776 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-30 02:12:10,949 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-30 02:12:10,950 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:10,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:10,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 2] total 7 [2020-11-30 02:12:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101645423] [2020-11-30 02:12:10,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:12:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:12:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:12:10,952 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 9 states. [2020-11-30 02:12:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:11,080 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-11-30 02:12:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:12:11,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-11-30 02:12:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:11,081 INFO L225 Difference]: With dead ends: 61 [2020-11-30 02:12:11,081 INFO L226 Difference]: Without dead ends: 61 [2020-11-30 02:12:11,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:12:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-30 02:12:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-11-30 02:12:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 02:12:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-11-30 02:12:11,087 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 10 [2020-11-30 02:12:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:11,087 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-11-30 02:12:11,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:12:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-11-30 02:12:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:12:11,092 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:11,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:12:11,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:11,304 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 188329252, now seen corresponding path program 1 times [2020-11-30 02:12:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:11,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029449059] [2020-11-30 02:12:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:12:11,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029449059] [2020-11-30 02:12:11,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258421318] [2020-11-30 02:12:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/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 02:12:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:11,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:12:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:11,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:11,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [509779489] [2020-11-30 02:12:11,521 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 02:12:11,521 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:11,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:11,522 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:11,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:11,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:11,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:11,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:12,386 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:12,791 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:13,020 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:13,251 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-30 02:12:13,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:13,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 4, 4] total 16 [2020-11-30 02:12:13,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331032344] [2020-11-30 02:12:13,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:12:13,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:12:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:12:13,359 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 8 states. [2020-11-30 02:12:13,666 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-11-30 02:12:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:13,781 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-11-30 02:12:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:12:13,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-30 02:12:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:13,783 INFO L225 Difference]: With dead ends: 54 [2020-11-30 02:12:13,783 INFO L226 Difference]: Without dead ends: 54 [2020-11-30 02:12:13,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:12:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-30 02:12:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-30 02:12:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 02:12:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-30 02:12:13,790 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2020-11-30 02:12:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:13,790 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-30 02:12:13,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:12:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-11-30 02:12:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:12:13,791 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:13,791 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-11-30 02:12:14,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-30 02:12:14,004 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash 188258073, now seen corresponding path program 2 times [2020-11-30 02:12:14,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:14,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251288414] [2020-11-30 02:12:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:14,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251288414] [2020-11-30 02:12:14,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:12:14,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:12:14,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653800575] [2020-11-30 02:12:14,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:12:14,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:14,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:12:14,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:12:14,046 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 3 states. [2020-11-30 02:12:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:14,082 INFO L93 Difference]: Finished difference Result 81 states and 110 transitions. [2020-11-30 02:12:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:12:14,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-30 02:12:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:14,090 INFO L225 Difference]: With dead ends: 81 [2020-11-30 02:12:14,090 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 02:12:14,090 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 [2020-11-30 02:12:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 02:12:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-11-30 02:12:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-30 02:12:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2020-11-30 02:12:14,100 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 13 [2020-11-30 02:12:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:14,101 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2020-11-30 02:12:14,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:12:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2020-11-30 02:12:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:12:14,102 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:14,102 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-11-30 02:12:14,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2020-11-30 02:12:14,102 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:14,102 INFO L82 PathProgramCache]: Analyzing trace with hash 521636203, now seen corresponding path program 3 times [2020-11-30 02:12:14,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:14,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746594441] [2020-11-30 02:12:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:12:14,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746594441] [2020-11-30 02:12:14,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927484274] [2020-11-30 02:12:14,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/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 02:12:14,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:12:14,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:12:14,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:12:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:12:14,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:12:14,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788229043] [2020-11-30 02:12:14,285 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:14,285 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:14,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:14,285 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:14,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:14,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:14,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:14,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:15,009 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:15,161 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:12:15,547 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:15,749 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-11-30 02:12:15,940 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:16,081 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-11-30 02:12:16,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:16,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:16,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-11-30 02:12:16,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736219728] [2020-11-30 02:12:16,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:12:16,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:16,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:12:16,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:12:16,200 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 9 states. [2020-11-30 02:12:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:16,318 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-11-30 02:12:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:12:16,318 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-30 02:12:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:16,319 INFO L225 Difference]: With dead ends: 52 [2020-11-30 02:12:16,319 INFO L226 Difference]: Without dead ends: 52 [2020-11-30 02:12:16,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-11-30 02:12:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-30 02:12:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-11-30 02:12:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 02:12:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2020-11-30 02:12:16,323 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 13 [2020-11-30 02:12:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:16,323 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-11-30 02:12:16,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:12:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2020-11-30 02:12:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:12:16,324 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:16,324 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-11-30 02:12:16,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:16,535 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:16,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033020, now seen corresponding path program 1 times [2020-11-30 02:12:16,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:16,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616185690] [2020-11-30 02:12:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:16,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616185690] [2020-11-30 02:12:16,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555070160] [2020-11-30 02:12:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:12:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:16,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:16,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488852831] [2020-11-30 02:12:16,663 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:16,663 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:16,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:16,664 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:16,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:16,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:16,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:16,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:17,395 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:17,552 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-11-30 02:12:17,892 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:18,126 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:18,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:18,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:18,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 4 [2020-11-30 02:12:18,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991165308] [2020-11-30 02:12:18,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:12:18,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:18,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:12:18,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:12:18,361 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 5 states. [2020-11-30 02:12:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:18,394 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-11-30 02:12:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:12:18,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-30 02:12:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:18,395 INFO L225 Difference]: With dead ends: 44 [2020-11-30 02:12:18,395 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 02:12:18,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:12:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 02:12:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-30 02:12:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 02:12:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-11-30 02:12:18,399 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2020-11-30 02:12:18,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:18,399 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-11-30 02:12:18,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:12:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-11-30 02:12:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:12:18,400 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:18,400 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-11-30 02:12:18,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-11-30 02:12:18,608 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1541033021, now seen corresponding path program 1 times [2020-11-30 02:12:18,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:18,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898589312] [2020-11-30 02:12:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:18,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898589312] [2020-11-30 02:12:18,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243759013] [2020-11-30 02:12:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:18,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 02:12:18,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:18,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041839885] [2020-11-30 02:12:18,819 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:18,819 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:18,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:18,820 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:18,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:18,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:18,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:19,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:19,531 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:19,664 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-11-30 02:12:20,066 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:20,302 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:20,543 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-30 02:12:20,544 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:20,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:20,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-30 02:12:20,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046570925] [2020-11-30 02:12:20,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:12:20,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:12:20,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:12:20,545 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-11-30 02:12:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:20,637 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-11-30 02:12:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:12:20,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-30 02:12:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:20,648 INFO L225 Difference]: With dead ends: 73 [2020-11-30 02:12:20,648 INFO L226 Difference]: Without dead ends: 73 [2020-11-30 02:12:20,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:12:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-30 02:12:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2020-11-30 02:12:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-30 02:12:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2020-11-30 02:12:20,653 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 14 [2020-11-30 02:12:20,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:20,653 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2020-11-30 02:12:20,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:12:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2020-11-30 02:12:20,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:12:20,654 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:20,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:12:20,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:20,864 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:20,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:20,865 INFO L82 PathProgramCache]: Analyzing trace with hash 595785087, now seen corresponding path program 1 times [2020-11-30 02:12:20,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:20,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602655290] [2020-11-30 02:12:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:20,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602655290] [2020-11-30 02:12:20,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513769342] [2020-11-30 02:12:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:12:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:21,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:12:21,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144468726] [2020-11-30 02:12:21,077 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:12:21,078 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:21,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:21,078 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:21,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:21,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:21,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:21,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:21,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:21,880 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:22,291 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:22,426 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-11-30 02:12:22,594 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:22,823 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-30 02:12:23,073 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:23,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:23,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-11-30 02:12:23,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414492158] [2020-11-30 02:12:23,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:12:23,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:12:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:12:23,075 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand 9 states. [2020-11-30 02:12:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:23,198 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-11-30 02:12:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:12:23,199 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-11-30 02:12:23,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:23,200 INFO L225 Difference]: With dead ends: 103 [2020-11-30 02:12:23,200 INFO L226 Difference]: Without dead ends: 103 [2020-11-30 02:12:23,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:12:23,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-30 02:12:23,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-11-30 02:12:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-30 02:12:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2020-11-30 02:12:23,206 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 15 [2020-11-30 02:12:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:23,206 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2020-11-30 02:12:23,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:12:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2020-11-30 02:12:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:12:23,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:23,207 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2020-11-30 02:12:23,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2020-11-30 02:12:23,408 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:23,408 INFO L82 PathProgramCache]: Analyzing trace with hash -830929546, now seen corresponding path program 4 times [2020-11-30 02:12:23,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:23,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498441818] [2020-11-30 02:12:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498441818] [2020-11-30 02:12:23,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148586863] [2020-11-30 02:12:23,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:12:23,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:23,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:12:23,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725161675] [2020-11-30 02:12:23,581 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:23,581 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:23,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:23,581 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:23,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:23,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:23,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:23,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:24,225 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:24,342 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:12:24,764 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:25,000 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:25,230 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:25,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:25,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-11-30 02:12:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310945386] [2020-11-30 02:12:25,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:12:25,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:12:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:12:25,232 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand 6 states. [2020-11-30 02:12:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:25,296 INFO L93 Difference]: Finished difference Result 194 states and 267 transitions. [2020-11-30 02:12:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:12:25,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-30 02:12:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:25,298 INFO L225 Difference]: With dead ends: 194 [2020-11-30 02:12:25,299 INFO L226 Difference]: Without dead ends: 194 [2020-11-30 02:12:25,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:12:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-30 02:12:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 100. [2020-11-30 02:12:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-30 02:12:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2020-11-30 02:12:25,306 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 16 [2020-11-30 02:12:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:25,307 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2020-11-30 02:12:25,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:12:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2020-11-30 02:12:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 02:12:25,308 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:25,308 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2020-11-30 02:12:25,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:25,532 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash 924819805, now seen corresponding path program 2 times [2020-11-30 02:12:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:25,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286102136] [2020-11-30 02:12:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-30 02:12:25,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286102136] [2020-11-30 02:12:25,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266258779] [2020-11-30 02:12:25,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:25,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-30 02:12:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:12:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 02:12:25,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-30 02:12:25,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-30 02:12:25,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163957698] [2020-11-30 02:12:25,773 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:25,773 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:25,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:25,773 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:25,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:25,860 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:25,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:26,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:26,456 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:26,579 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-11-30 02:12:26,950 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:27,210 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:27,449 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:27,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:27,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2020-11-30 02:12:27,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075437203] [2020-11-30 02:12:27,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 02:12:27,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 02:12:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:12:27,451 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand 12 states. [2020-11-30 02:12:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:27,557 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-11-30 02:12:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:12:27,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-11-30 02:12:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:27,558 INFO L225 Difference]: With dead ends: 98 [2020-11-30 02:12:27,558 INFO L226 Difference]: Without dead ends: 98 [2020-11-30 02:12:27,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-11-30 02:12:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-30 02:12:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2020-11-30 02:12:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 02:12:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-11-30 02:12:27,566 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 20 [2020-11-30 02:12:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:27,566 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-11-30 02:12:27,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 02:12:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-11-30 02:12:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 02:12:27,568 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:27,568 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1] [2020-11-30 02:12:27,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:27,784 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1432583701, now seen corresponding path program 2 times [2020-11-30 02:12:27,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:27,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493107482] [2020-11-30 02:12:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-30 02:12:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493107482] [2020-11-30 02:12:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775410384] [2020-11-30 02:12:27,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:27,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:12:27,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:12:27,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:12:27,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 02:12:28,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-30 02:12:28,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870085851] [2020-11-30 02:12:28,084 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:12:28,084 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:12:28,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:12:28,085 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:12:28,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:12:28,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:28,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:28,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:12:28,647 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:12:28,796 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-11-30 02:12:29,158 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-11-30 02:12:29,411 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-30 02:12:29,663 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:12:29,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:12:29,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2020-11-30 02:12:29,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909821655] [2020-11-30 02:12:29,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:12:29,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:29,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:12:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-11-30 02:12:29,664 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 13 states. [2020-11-30 02:12:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:30,086 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-11-30 02:12:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:12:30,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-11-30 02:12:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:30,086 INFO L225 Difference]: With dead ends: 74 [2020-11-30 02:12:30,086 INFO L226 Difference]: Without dead ends: 74 [2020-11-30 02:12:30,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-11-30 02:12:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-30 02:12:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-11-30 02:12:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-30 02:12:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-11-30 02:12:30,090 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 28 [2020-11-30 02:12:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:30,090 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-11-30 02:12:30,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 02:12:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-11-30 02:12:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-30 02:12:30,092 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:12:30,092 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-11-30 02:12:30,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2020-11-30 02:12:30,292 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:12:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:12:30,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1496073855, now seen corresponding path program 2 times [2020-11-30 02:12:30,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:12:30,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020010974] [2020-11-30 02:12:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:12:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:12:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 149 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-30 02:12:30,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020010974] [2020-11-30 02:12:30,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968818044] [2020-11-30 02:12:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:30,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-30 02:12:30,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:12:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:12:30,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:12:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-30 02:12:30,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:12:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-30 02:12:30,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:12:30,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [9] total 13 [2020-11-30 02:12:30,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930338007] [2020-11-30 02:12:30,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:12:30,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:12:30,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:12:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:12:30,559 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand 6 states. [2020-11-30 02:12:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:12:30,584 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-11-30 02:12:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:12:30,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-11-30 02:12:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:12:30,585 INFO L225 Difference]: With dead ends: 67 [2020-11-30 02:12:30,585 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:12:30,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:12:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:12:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:12:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:12:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:12:30,586 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-11-30 02:12:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:12:30,587 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:12:30,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:12:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:12:30,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:12:30,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:12:30,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:12:30 BoogieIcfgContainer [2020-11-30 02:12:30,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:12:30,793 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:12:30,793 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:12:30,793 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:12:30,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:12:00" (3/4) ... [2020-11-30 02:12:30,797 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:12:30,811 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-30 02:12:30,811 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-30 02:12:30,811 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:12:30,850 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_679f08af-94a1-4214-8938-6f2cb26a5aa3/bin/utaipan/witness.graphml [2020-11-30 02:12:30,850 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:12:30,852 INFO L168 Benchmark]: Toolchain (without parser) took 30842.66 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 72.5 MB in the beginning and 133.5 MB in the end (delta: -61.0 MB). Peak memory consumption was 92.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:30,852 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:12:30,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.36 ms. Allocated memory is still 98.6 MB. Free memory was 72.3 MB in the beginning and 75.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:30,853 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.24 ms. Allocated memory is still 98.6 MB. Free memory was 75.1 MB in the beginning and 73.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:12:30,853 INFO L168 Benchmark]: Boogie Preprocessor took 51.08 ms. Allocated memory is still 98.6 MB. Free memory was 73.6 MB in the beginning and 72.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:30,854 INFO L168 Benchmark]: RCFGBuilder took 552.50 ms. Allocated memory is still 98.6 MB. Free memory was 72.3 MB in the beginning and 50.7 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:30,854 INFO L168 Benchmark]: TraceAbstraction took 29878.73 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 50.4 MB in the beginning and 136.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 69.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:30,854 INFO L168 Benchmark]: Witness Printer took 57.91 ms. Allocated memory is still 251.7 MB. Free memory was 136.6 MB in the beginning and 133.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:12:30,856 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 251.36 ms. Allocated memory is still 98.6 MB. Free memory was 72.3 MB in the beginning and 75.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.24 ms. Allocated memory is still 98.6 MB. Free memory was 75.1 MB in the beginning and 73.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.08 ms. Allocated memory is still 98.6 MB. Free memory was 73.6 MB in the beginning and 72.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 552.50 ms. Allocated memory is still 98.6 MB. Free memory was 72.3 MB in the beginning and 50.7 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 29878.73 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 50.4 MB in the beginning and 136.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 69.0 MB. Max. memory is 16.1 GB. * Witness Printer took 57.91 ms. Allocated memory is still 251.7 MB. Free memory was 136.6 MB in the beginning and 133.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.8s, OverallIterations: 17, TraceHistogramMax: 9, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 646 SDslu, 253 SDs, 0 SdLazy, 764 SolverSat, 139 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 654 GetRequests, 458 SyntacticMatches, 6 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 286 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 451 NumberOfCodeBlocks, 373 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 621 ConstructedInterpolants, 11 QuantifiedInterpolants, 145677 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1142 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 939/1181 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]: 1774, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 18, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 44, TOOLS_POST_TIME[ms]: 788, 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: 44, TOOLS_QUANTIFIERELIM_TIME[ms]: 764, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 130, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 77, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME[ms]: 535, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 313, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 27, DOMAIN_ISBOTTOM_APPLICATIONS: 18, DOMAIN_ISBOTTOM_TIME[ms]: 58, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1049, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1049, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, 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]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 139, DAG_COMPRESSION_RETAINED_NODES: 54, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...