./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI --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 822411a57a10ce043cb0121fce52bdc7e9506783 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:27:13,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:13,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:13,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:13,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:13,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:13,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:13,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:13,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:13,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:13,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:13,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:13,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:13,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:13,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:13,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:13,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:13,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:13,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:13,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:13,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:13,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:13,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:13,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:13,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:13,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:13,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:13,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:13,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:13,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:13,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:13,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:13,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:13,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:13,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:13,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:13,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:13,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:13,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:13,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:13,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:13,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:27:13,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:13,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:13,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:13,795 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:13,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:13,795 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:13,796 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:13,796 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:13,796 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:13,796 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:13,797 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:13,798 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:13,798 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:13,798 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:13,799 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:13,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:27:13,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:27:13,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:13,801 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:27:13,801 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:27:13,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:13,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:27:13,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:13,802 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:27:13,802 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:27:13,802 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:27:13,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:13,803 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:27:13,803 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:27:13,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:13,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:13,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:13,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:13,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:13,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:13,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:13,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:13,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:13,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:13,806 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_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 822411a57a10ce043cb0121fce52bdc7e9506783 [2021-10-11 02:27:14,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:14,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:14,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:14,102 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:14,103 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:14,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2021-10-11 02:27:14,172 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/data/011a1b935/8ed1c729a6d44935b7bd0a0081b16caa/FLAG7e4270369 [2021-10-11 02:27:14,779 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:14,780 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2021-10-11 02:27:14,791 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/data/011a1b935/8ed1c729a6d44935b7bd0a0081b16caa/FLAG7e4270369 [2021-10-11 02:27:15,097 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/data/011a1b935/8ed1c729a6d44935b7bd0a0081b16caa [2021-10-11 02:27:15,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:15,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:15,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:15,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:15,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:15,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7320b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15, skipping insertion in model container [2021-10-11 02:27:15,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:15,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:15,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:15,490 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:15,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:15,608 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:15,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15 WrapperNode [2021-10-11 02:27:15,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:15,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:15,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:15,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:15,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:15,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:15,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:15,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:15,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... [2021-10-11 02:27:15,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:15,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:15,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:15,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:15,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:15,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:27:15,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:27:15,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:27:15,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:15,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:16,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:16,194 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:27:16,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:16 BoogieIcfgContainer [2021-10-11 02:27:16,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:16,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:16,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:16,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:16,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:15" (1/3) ... [2021-10-11 02:27:16,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e8586e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:16, skipping insertion in model container [2021-10-11 02:27:16,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:15" (2/3) ... [2021-10-11 02:27:16,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e8586e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:16, skipping insertion in model container [2021-10-11 02:27:16,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:16" (3/3) ... [2021-10-11 02:27:16,211 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cbzero-alloca-2.i [2021-10-11 02:27:16,243 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:16,247 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-10-11 02:27:16,259 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-11 02:27:16,294 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:16,294 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:27:16,294 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:16,295 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:16,295 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:16,295 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:16,295 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:16,295 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:27:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:27:16,316 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:16,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:27:16,318 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:27:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash 76485, now seen corresponding path program 1 times [2021-10-11 02:27:16,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:16,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805746576] [2021-10-11 02:27:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:16,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805746576] [2021-10-11 02:27:16,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:16,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:27:16,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665804848] [2021-10-11 02:27:16,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:16,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:16,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:16,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:16,497 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2021-10-11 02:27:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:16,529 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:27:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:16,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:27:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:16,539 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:27:16,539 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:27:16,541 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 [2021-10-11 02:27:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:27:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:27:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:27:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-11 02:27:16,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 3 [2021-10-11 02:27:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:16,572 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-11 02:27:16,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-11 02:27:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:27:16,573 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:16,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:27:16,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:16,573 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:27:16,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash 73547189, now seen corresponding path program 1 times [2021-10-11 02:27:16,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:16,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547512013] [2021-10-11 02:27:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:16,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547512013] [2021-10-11 02:27:16,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:16,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:16,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644693648] [2021-10-11 02:27:16,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:16,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:16,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:16,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:16,659 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2021-10-11 02:27:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:16,715 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-10-11 02:27:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:16,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-10-11 02:27:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:16,716 INFO L225 Difference]: With dead ends: 9 [2021-10-11 02:27:16,716 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:27:16,717 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 [2021-10-11 02:27:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:27:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:27:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:27:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-11 02:27:16,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-10-11 02:27:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:16,723 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-11 02:27:16,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-11 02:27:16,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:27:16,724 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:16,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:27:16,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:27:16,725 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:27:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash 73547190, now seen corresponding path program 1 times [2021-10-11 02:27:16,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:16,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815220655] [2021-10-11 02:27:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:16,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815220655] [2021-10-11 02:27:16,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:16,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:16,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742871770] [2021-10-11 02:27:16,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:27:16,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:27:16,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:16,918 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2021-10-11 02:27:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:16,967 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-11 02:27:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:27:16,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2021-10-11 02:27:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:16,969 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:27:16,969 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:27:16,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:27:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:27:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-10-11 02:27:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:27:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-11 02:27:16,973 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2021-10-11 02:27:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:16,973 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-11 02:27:16,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:27:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-11 02:27:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:27:16,974 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:16,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:27:16,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:27:16,974 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:27:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2015006103, now seen corresponding path program 1 times [2021-10-11 02:27:16,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:16,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076482219] [2021-10-11 02:27:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:17,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076482219] [2021-10-11 02:27:17,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:17,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:27:17,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32646069] [2021-10-11 02:27:17,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:27:17,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:17,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:27:17,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:17,096 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2021-10-11 02:27:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:17,149 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-10-11 02:27:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:27:17,150 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-10-11 02:27:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:17,152 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:27:17,152 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:27:17,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:27:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:27:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 02:27:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:27:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-11 02:27:17,157 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2021-10-11 02:27:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:17,158 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-11 02:27:17,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:27:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-11 02:27:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:27:17,159 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:17,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-11 02:27:17,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:27:17,161 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:27:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash 611367033, now seen corresponding path program 1 times [2021-10-11 02:27:17,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:17,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367675723] [2021-10-11 02:27:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:17,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367675723] [2021-10-11 02:27:17,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857052542] [2021-10-11 02:27:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:17,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-11 02:27:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:17,610 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 [2021-10-11 02:27:17,612 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:27:17,620 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:27:17,622 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:27:17,622 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2021-10-11 02:27:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:17,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:18,010 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:27:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:18,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723821212] [2021-10-11 02:27:18,276 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:27:18,276 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:27:18,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:27:18,286 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:27:18,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:27:18,812 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:27:19,065 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-10-11 02:27:19,391 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-10-11 02:27:19,394 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:27:19,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:27:19,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2021-10-11 02:27:19,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107776735] [2021-10-11 02:27:19,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-10-11 02:27:19,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-11 02:27:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-10-11 02:27:19,397 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2021-10-11 02:27:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:19,755 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-10-11 02:27:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:27:19,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 8 [2021-10-11 02:27:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:19,757 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:27:19,757 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:27:19,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-10-11 02:27:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:27:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 02:27:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:27:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-11 02:27:19,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2021-10-11 02:27:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:19,761 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-11 02:27:19,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-10-11 02:27:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-11 02:27:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:27:19,761 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:19,761 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:19,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:27:19,975 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:27:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1772507142, now seen corresponding path program 1 times [2021-10-11 02:27:19,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:19,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298192999] [2021-10-11 02:27:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:27:20,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298192999] [2021-10-11 02:27:20,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:20,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:20,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374502198] [2021-10-11 02:27:20,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:20,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:20,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:20,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:20,058 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2021-10-11 02:27:20,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:20,068 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-11 02:27:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:20,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 02:27:20,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:20,070 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:27:20,070 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:27:20,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:27:20,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 02:27:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:27:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-11 02:27:20,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-10-11 02:27:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:20,074 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-11 02:27:20,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-11 02:27:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:27:20,076 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:20,076 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2021-10-11 02:27:20,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-11 02:27:20,076 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2021-10-11 02:27:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1720671530, now seen corresponding path program 2 times [2021-10-11 02:27:20,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:20,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615558861] [2021-10-11 02:27:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615558861] [2021-10-11 02:27:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850185337] [2021-10-11 02:27:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:20,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:27:20,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:27:20,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-11 02:27:20,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:20,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:21,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599197885] [2021-10-11 02:27:21,757 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:27:21,758 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:27:21,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:27:21,758 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:27:21,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:27:22,056 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:27:22,267 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-10-11 02:27:22,611 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-10-11 02:27:22,612 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:27:22,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:27:22,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2021-10-11 02:27:22,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166582171] [2021-10-11 02:27:22,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-10-11 02:27:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-11 02:27:22,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-10-11 02:27:22,615 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 28 states. [2021-10-11 02:27:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:23,564 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-11 02:27:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-11 02:27:23,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2021-10-11 02:27:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:23,565 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:27:23,565 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:27:23,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=248, Invalid=1644, Unknown=0, NotChecked=0, Total=1892 [2021-10-11 02:27:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:27:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:27:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:27:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:27:23,568 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-10-11 02:27:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:23,568 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:27:23,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-10-11 02:27:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:27:23,568 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:27:23,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:27:23,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:23 BoogieIcfgContainer [2021-10-11 02:27:23,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:23,773 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:23,773 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:23,773 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:23,774 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:16" (3/4) ... [2021-10-11 02:27:23,779 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:27:23,791 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-11 02:27:23,791 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:27:23,791 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:27:23,830 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5104ccb-909d-4fe2-95fa-0fc6a8e17702/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:23,830 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:23,837 INFO L168 Benchmark]: Toolchain (without parser) took 8732.56 ms. Allocated memory was 100.7 MB in the beginning and 195.0 MB in the end (delta: 94.4 MB). Free memory was 69.5 MB in the beginning and 120.2 MB in the end (delta: -50.8 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:23,837 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 100.7 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:23,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 499.98 ms. Allocated memory is still 100.7 MB. Free memory was 69.3 MB in the beginning and 66.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:23,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.55 ms. Allocated memory is still 100.7 MB. Free memory was 66.2 MB in the beginning and 64.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:23,838 INFO L168 Benchmark]: Boogie Preprocessor took 47.73 ms. Allocated memory is still 100.7 MB. Free memory was 64.6 MB in the beginning and 63.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:23,839 INFO L168 Benchmark]: RCFGBuilder took 478.33 ms. Allocated memory is still 100.7 MB. Free memory was 63.4 MB in the beginning and 45.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:23,840 INFO L168 Benchmark]: TraceAbstraction took 7573.91 ms. Allocated memory was 100.7 MB in the beginning and 195.0 MB in the end (delta: 94.4 MB). Free memory was 45.4 MB in the beginning and 122.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:23,840 INFO L168 Benchmark]: Witness Printer took 60.46 ms. Allocated memory is still 195.0 MB. Free memory was 122.9 MB in the beginning and 120.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:23,848 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 100.7 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 499.98 ms. Allocated memory is still 100.7 MB. Free memory was 69.3 MB in the beginning and 66.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.55 ms. Allocated memory is still 100.7 MB. Free memory was 66.2 MB in the beginning and 64.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.73 ms. Allocated memory is still 100.7 MB. Free memory was 64.6 MB in the beginning and 63.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 478.33 ms. Allocated memory is still 100.7 MB. Free memory was 63.4 MB in the beginning and 45.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7573.91 ms. Allocated memory was 100.7 MB in the beginning and 195.0 MB in the end (delta: 94.4 MB). Free memory was 45.4 MB in the beginning and 122.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * Witness Printer took 60.46 ms. Allocated memory is still 195.0 MB. Free memory was 122.9 MB in the beginning and 120.2 MB in the end (delta: 2.6 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: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.4s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 45 SDslu, 84 SDs, 0 SdLazy, 281 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=5, 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, 7 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 9236 SizeOfPredicates, 32 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 2/38 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...