./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b9dfe2826dbd43b76a93fbf593c8a07947a4c894 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 15:41:56,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 15:41:56,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 15:41:56,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 15:41:56,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 15:41:56,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 15:41:56,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 15:41:56,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 15:41:56,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 15:41:56,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 15:41:56,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 15:41:56,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 15:41:56,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 15:41:56,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 15:41:56,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 15:41:56,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 15:41:56,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 15:41:56,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 15:41:56,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 15:41:56,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 15:41:56,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 15:41:56,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 15:41:56,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 15:41:56,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 15:41:56,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 15:41:56,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 15:41:56,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 15:41:56,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 15:41:56,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 15:41:56,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 15:41:56,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 15:41:56,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 15:41:56,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 15:41:56,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 15:41:56,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 15:41:56,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 15:41:56,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 15:41:56,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 15:41:56,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 15:41:56,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 15:41:56,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 15:41:56,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2020-12-09 15:41:56,848 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 15:41:56,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 15:41:56,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 15:41:56,850 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 15:41:56,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 15:41:56,850 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 15:41:56,850 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 15:41:56,850 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 15:41:56,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 15:41:56,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 15:41:56,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 15:41:56,851 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 15:41:56,851 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 15:41:56,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 15:41:56,851 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 15:41:56,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 15:41:56,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 15:41:56,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 15:41:56,852 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 15:41:56,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 15:41:56,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 15:41:56,852 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 15:41:56,852 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 15:41:56,853 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 15:41:56,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 15:41:56,853 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 15:41:56,853 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 15:41:56,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 15:41:56,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 15:41:56,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:41:56,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 15:41:56,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 15:41:56,854 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 15:41:56,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 15:41:56,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 15:41:56,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 15:41:56,855 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_4a9af726-d9be-4597-b561-d9cad5d54a6d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9dfe2826dbd43b76a93fbf593c8a07947a4c894 [2020-12-09 15:41:57,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 15:41:57,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 15:41:57,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 15:41:57,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 15:41:57,077 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 15:41:57,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2020-12-09 15:41:57,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/data/16863a871/a34c5d7902d54708ae7fcdad56f4923c/FLAG284f2ecc4 [2020-12-09 15:41:57,466 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 15:41:57,466 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2020-12-09 15:41:57,472 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/data/16863a871/a34c5d7902d54708ae7fcdad56f4923c/FLAG284f2ecc4 [2020-12-09 15:41:57,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/data/16863a871/a34c5d7902d54708ae7fcdad56f4923c [2020-12-09 15:41:57,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 15:41:57,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 15:41:57,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 15:41:57,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 15:41:57,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 15:41:57,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a617597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57, skipping insertion in model container [2020-12-09 15:41:57,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 15:41:57,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 15:41:57,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:41:57,601 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 15:41:57,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:41:57,627 INFO L208 MainTranslator]: Completed translation [2020-12-09 15:41:57,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57 WrapperNode [2020-12-09 15:41:57,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 15:41:57,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 15:41:57,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 15:41:57,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 15:41:57,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 15:41:57,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 15:41:57,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 15:41:57,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 15:41:57,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... [2020-12-09 15:41:57,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 15:41:57,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 15:41:57,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 15:41:57,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 15:41:57,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:41:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 15:41:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 15:41:57,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 15:41:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 15:41:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 15:41:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 15:41:57,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 15:41:57,969 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 15:41:57,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:41:57 BoogieIcfgContainer [2020-12-09 15:41:57,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 15:41:57,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 15:41:57,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 15:41:57,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 15:41:57,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:41:57" (1/3) ... [2020-12-09 15:41:57,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bc96f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:41:57, skipping insertion in model container [2020-12-09 15:41:57,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:41:57" (2/3) ... [2020-12-09 15:41:57,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bc96f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:41:57, skipping insertion in model container [2020-12-09 15:41:57,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:41:57" (3/3) ... [2020-12-09 15:41:57,979 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2020-12-09 15:41:57,994 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 15:41:57,997 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-09 15:41:58,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-09 15:41:58,027 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 15:41:58,027 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 15:41:58,027 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 15:41:58,027 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 15:41:58,027 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 15:41:58,027 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 15:41:58,028 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 15:41:58,028 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 15:41:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-09 15:41:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 15:41:58,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:41:58,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 15:41:58,047 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:41:58,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:41:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash 88734, now seen corresponding path program 1 times [2020-12-09 15:41:58,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:41:58,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384165999] [2020-12-09 15:41:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:41:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:58,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384165999] [2020-12-09 15:41:58,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:41:58,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 15:41:58,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080215703] [2020-12-09 15:41:58,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:41:58,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:41:58,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:41:58,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:41:58,182 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-09 15:41:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:41:58,218 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-09 15:41:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:41:58,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 15:41:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:41:58,224 INFO L225 Difference]: With dead ends: 18 [2020-12-09 15:41:58,224 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 15:41:58,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:41:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 15:41:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 15:41:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 15:41:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-09 15:41:58,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 3 [2020-12-09 15:41:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:41:58,251 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-09 15:41:58,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:41:58,251 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-09 15:41:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 15:41:58,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:41:58,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 15:41:58,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 15:41:58,252 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:41:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:41:58,252 INFO L82 PathProgramCache]: Analyzing trace with hash 88735, now seen corresponding path program 1 times [2020-12-09 15:41:58,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:41:58,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539389453] [2020-12-09 15:41:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:41:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:58,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539389453] [2020-12-09 15:41:58,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:41:58,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 15:41:58,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439512547] [2020-12-09 15:41:58,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:41:58,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:41:58,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:41:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:41:58,295 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-12-09 15:41:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:41:58,318 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-09 15:41:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:41:58,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 15:41:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:41:58,319 INFO L225 Difference]: With dead ends: 19 [2020-12-09 15:41:58,319 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 15:41:58,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:41:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 15:41:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 15:41:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 15:41:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 15:41:58,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 3 [2020-12-09 15:41:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:41:58,324 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 15:41:58,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:41:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 15:41:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 15:41:58,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:41:58,324 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 15:41:58,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 15:41:58,325 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:41:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:41:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash 85326552, now seen corresponding path program 1 times [2020-12-09 15:41:58,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:41:58,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588738104] [2020-12-09 15:41:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:41:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:58,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588738104] [2020-12-09 15:41:58,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122871376] [2020-12-09 15:41:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:41:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 15:41:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:41:58,452 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-09 15:41:58,453 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 15:41:58,459 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 15:41:58,460 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 15:41:58,460 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-09 15:41:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:58,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:41:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:58,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891003498] [2020-12-09 15:41:58,522 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 15:41:58,523 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:41:58,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:41:58,529 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:41:58,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:41:58,799 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:41:58,938 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:41:58,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:41:58,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 15:41:58,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110065095] [2020-12-09 15:41:58,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:41:58,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:41:58,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:41:58,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 15:41:58,939 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2020-12-09 15:41:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:41:59,009 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-12-09 15:41:59,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:41:59,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 15:41:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:41:59,010 INFO L225 Difference]: With dead ends: 47 [2020-12-09 15:41:59,010 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 15:41:59,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 15:41:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 15:41:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2020-12-09 15:41:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 15:41:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-09 15:41:59,014 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 5 [2020-12-09 15:41:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:41:59,015 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-09 15:41:59,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:41:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-09 15:41:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 15:41:59,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:41:59,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 15:41:59,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 15:41:59,217 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:41:59,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:41:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1149568740, now seen corresponding path program 1 times [2020-12-09 15:41:59,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:41:59,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469668197] [2020-12-09 15:41:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:41:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 15:41:59,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469668197] [2020-12-09 15:41:59,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:41:59,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 15:41:59,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738521282] [2020-12-09 15:41:59,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:41:59,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:41:59,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:41:59,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:41:59,355 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2020-12-09 15:41:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:41:59,401 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-12-09 15:41:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:41:59,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 15:41:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:41:59,404 INFO L225 Difference]: With dead ends: 33 [2020-12-09 15:41:59,404 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 15:41:59,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:41:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 15:41:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-09 15:41:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 15:41:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-09 15:41:59,410 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 9 [2020-12-09 15:41:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:41:59,410 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-09 15:41:59,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:41:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-09 15:41:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 15:41:59,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:41:59,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:41:59,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-09 15:41:59,411 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:41:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:41:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash 929151335, now seen corresponding path program 1 times [2020-12-09 15:41:59,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:41:59,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951272772] [2020-12-09 15:41:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:41:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 15:41:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951272772] [2020-12-09 15:41:59,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:41:59,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:41:59,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458276222] [2020-12-09 15:41:59,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:41:59,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:41:59,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:41:59,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:41:59,438 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-12-09 15:41:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:41:59,465 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-09 15:41:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:41:59,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 15:41:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:41:59,466 INFO L225 Difference]: With dead ends: 35 [2020-12-09 15:41:59,466 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 15:41:59,466 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 [2020-12-09 15:41:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 15:41:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-09 15:41:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 15:41:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-12-09 15:41:59,468 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 11 [2020-12-09 15:41:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:41:59,469 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-12-09 15:41:59,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:41:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-12-09 15:41:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 15:41:59,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:41:59,469 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 15:41:59,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-09 15:41:59,469 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:41:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:41:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash -691331581, now seen corresponding path program 2 times [2020-12-09 15:41:59,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:41:59,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322851124] [2020-12-09 15:41:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:41:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:59,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322851124] [2020-12-09 15:41:59,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:41:59,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 15:41:59,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882958775] [2020-12-09 15:41:59,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 15:41:59,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:41:59,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 15:41:59,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-09 15:41:59,567 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 8 states. [2020-12-09 15:41:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:41:59,610 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-12-09 15:41:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 15:41:59,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 15:41:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:41:59,611 INFO L225 Difference]: With dead ends: 31 [2020-12-09 15:41:59,611 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 15:41:59,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-09 15:41:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 15:41:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-12-09 15:41:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 15:41:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-09 15:41:59,615 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2020-12-09 15:41:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:41:59,615 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-09 15:41:59,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 15:41:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-09 15:41:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 15:41:59,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:41:59,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:41:59,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-09 15:41:59,616 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:41:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:41:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1265835680, now seen corresponding path program 1 times [2020-12-09 15:41:59,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:41:59,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338774706] [2020-12-09 15:41:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:41:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:59,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338774706] [2020-12-09 15:41:59,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187723890] [2020-12-09 15:41:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:41:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:41:59,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 15:41:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:41:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:59,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:41:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:41:59,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [319955418] [2020-12-09 15:41:59,727 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 15:41:59,728 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:41:59,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:41:59,728 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:41:59,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:41:59,936 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:42:00,225 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:42:00,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:42:00,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-09 15:42:00,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077515406] [2020-12-09 15:42:00,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 15:42:00,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:42:00,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 15:42:00,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-12-09 15:42:00,226 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-12-09 15:42:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:42:00,244 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-09 15:42:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 15:42:00,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 15:42:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:42:00,245 INFO L225 Difference]: With dead ends: 34 [2020-12-09 15:42:00,245 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 15:42:00,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-12-09 15:42:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 15:42:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 15:42:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 15:42:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-09 15:42:00,247 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2020-12-09 15:42:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:42:00,247 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-09 15:42:00,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 15:42:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-09 15:42:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 15:42:00,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:42:00,248 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:42:00,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:42:00,449 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:42:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:42:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash -843141508, now seen corresponding path program 2 times [2020-12-09 15:42:00,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:42:00,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030303669] [2020-12-09 15:42:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:42:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:42:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:42:00,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030303669] [2020-12-09 15:42:00,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789668890] [2020-12-09 15:42:00,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:42:00,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 15:42:00,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:42:00,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 15:42:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:42:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 15:42:00,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:42:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 15:42:00,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 15:42:00,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-12-09 15:42:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992179962] [2020-12-09 15:42:00,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:42:00,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:42:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:42:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 15:42:00,615 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-12-09 15:42:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:42:00,642 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-12-09 15:42:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:42:00,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-09 15:42:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:42:00,643 INFO L225 Difference]: With dead ends: 33 [2020-12-09 15:42:00,643 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 15:42:00,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-09 15:42:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 15:42:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 15:42:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 15:42:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-09 15:42:00,645 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2020-12-09 15:42:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:42:00,645 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-09 15:42:00,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:42:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-09 15:42:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 15:42:00,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:42:00,646 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 15:42:00,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-09 15:42:00,847 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:42:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:42:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1491197133, now seen corresponding path program 1 times [2020-12-09 15:42:00,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:42:00,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522822849] [2020-12-09 15:42:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:42:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:42:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:42:00,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522822849] [2020-12-09 15:42:00,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405961491] [2020-12-09 15:42:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/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 [2020-12-09 15:42:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:42:01,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 15:42:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:42:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:42:01,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:42:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:42:01,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119204922] [2020-12-09 15:42:01,149 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 15:42:01,149 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:42:01,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:42:01,149 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:42:01,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:42:01,419 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:42:01,735 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:42:01,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:42:01,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2020-12-09 15:42:01,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527357147] [2020-12-09 15:42:01,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 15:42:01,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:42:01,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 15:42:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-12-09 15:42:01,736 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 16 states. [2020-12-09 15:42:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:42:01,773 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-12-09 15:42:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 15:42:01,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-12-09 15:42:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:42:01,774 INFO L225 Difference]: With dead ends: 47 [2020-12-09 15:42:01,774 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 15:42:01,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-12-09 15:42:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 15:42:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-09 15:42:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-09 15:42:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-09 15:42:01,777 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 22 [2020-12-09 15:42:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:42:01,777 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-09 15:42:01,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 15:42:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-09 15:42:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-09 15:42:01,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:42:01,778 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 15:42:01,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-09 15:42:01,980 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:42:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:42:01,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1389769989, now seen corresponding path program 2 times [2020-12-09 15:42:01,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:42:01,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429735724] [2020-12-09 15:42:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:42:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:42:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:42:02,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429735724] [2020-12-09 15:42:02,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934802846] [2020-12-09 15:42:02,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/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 [2020-12-09 15:42:02,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 15:42:02,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:42:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 15:42:02,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:42:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-09 15:42:02,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:42:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-09 15:42:02,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 15:42:02,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 4] total 24 [2020-12-09 15:42:02,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112347020] [2020-12-09 15:42:02,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:42:02,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:42:02,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:42:02,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-12-09 15:42:02,474 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2020-12-09 15:42:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:42:02,531 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-12-09 15:42:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 15:42:02,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-12-09 15:42:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:42:02,532 INFO L225 Difference]: With dead ends: 47 [2020-12-09 15:42:02,532 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 15:42:02,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2020-12-09 15:42:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 15:42:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 15:42:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 15:42:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 15:42:02,532 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-12-09 15:42:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:42:02,532 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 15:42:02,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:42:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 15:42:02,533 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 15:42:02,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:42:02,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 03:42:02 BoogieIcfgContainer [2020-12-09 15:42:02,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 15:42:02,745 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 15:42:02,745 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 15:42:02,746 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 15:42:02,747 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:41:57" (3/4) ... [2020-12-09 15:42:02,754 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 15:42:02,773 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-09 15:42:02,774 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 15:42:02,774 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 15:42:02,804 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4a9af726-d9be-4597-b561-d9cad5d54a6d/bin/utaipan/witness.graphml [2020-12-09 15:42:02,805 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 15:42:02,805 INFO L168 Benchmark]: Toolchain (without parser) took 5321.40 ms. Allocated memory was 94.4 MB in the beginning and 138.4 MB in the end (delta: 44.0 MB). Free memory was 54.2 MB in the beginning and 87.5 MB in the end (delta: -33.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-12-09 15:42:02,806 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 70.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:42:02,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.03 ms. Allocated memory is still 94.4 MB. Free memory was 54.1 MB in the beginning and 69.3 MB in the end (delta: -15.2 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:42:02,806 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.79 ms. Allocated memory is still 94.4 MB. Free memory was 69.3 MB in the beginning and 67.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:42:02,807 INFO L168 Benchmark]: Boogie Preprocessor took 18.92 ms. Allocated memory is still 94.4 MB. Free memory was 67.6 MB in the beginning and 66.6 MB in the end (delta: 985.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:42:02,807 INFO L168 Benchmark]: RCFGBuilder took 298.25 ms. Allocated memory is still 94.4 MB. Free memory was 66.6 MB in the beginning and 61.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 15:42:02,807 INFO L168 Benchmark]: TraceAbstraction took 4771.17 ms. Allocated memory was 94.4 MB in the beginning and 138.4 MB in the end (delta: 44.0 MB). Free memory was 60.7 MB in the beginning and 90.3 MB in the end (delta: -29.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2020-12-09 15:42:02,808 INFO L168 Benchmark]: Witness Printer took 59.52 ms. Allocated memory is still 138.4 MB. Free memory was 90.3 MB in the beginning and 87.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:42:02,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 70.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 143.03 ms. Allocated memory is still 94.4 MB. Free memory was 54.1 MB in the beginning and 69.3 MB in the end (delta: -15.2 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.79 ms. Allocated memory is still 94.4 MB. Free memory was 69.3 MB in the beginning and 67.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.92 ms. Allocated memory is still 94.4 MB. Free memory was 67.6 MB in the beginning and 66.6 MB in the end (delta: 985.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 298.25 ms. Allocated memory is still 94.4 MB. Free memory was 66.6 MB in the beginning and 61.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4771.17 ms. Allocated memory was 94.4 MB in the beginning and 138.4 MB in the end (delta: 44.0 MB). Free memory was 60.7 MB in the beginning and 90.3 MB in the end (delta: -29.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * Witness Printer took 59.52 ms. Allocated memory is still 138.4 MB. Free memory was 90.3 MB in the beginning and 87.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 10, TraceHistogramMax: 14, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 209 SDslu, 158 SDs, 0 SdLazy, 264 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 182 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 231 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 308 ConstructedInterpolants, 1 QuantifiedInterpolants, 73846 SizeOfPredicates, 1 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 507/868 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...