./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c --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_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/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_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/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_1b694bfc-c754-4401-a9ec-e18705ba1f6b/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 60fa12f4a8e344f82de5faf31b8f2cbfbaaacd93 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:32:19,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:32:19,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:32:19,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:32:19,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:32:19,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:32:19,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:32:19,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:32:19,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:32:19,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:32:19,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:32:19,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:32:19,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:32:19,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:32:19,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:32:19,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:32:19,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:32:19,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:32:19,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:32:19,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:32:19,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:32:19,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:32:19,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:32:19,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:32:19,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:32:19,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:32:19,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:32:19,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:32:19,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:32:19,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:32:19,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:32:19,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:32:19,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:32:19,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:32:19,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:32:19,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:32:19,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:32:19,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:32:19,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:32:19,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:32:19,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:32:19,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:32:19,212 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:32:19,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:32:19,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:32:19,214 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:32:19,214 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:32:19,220 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:32:19,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:32:19,220 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:32:19,220 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:32:19,221 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:32:19,222 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:32:19,222 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:32:19,222 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:32:19,222 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:32:19,223 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:32:19,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:32:19,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:32:19,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:32:19,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:32:19,224 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:32:19,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:32:19,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:32:19,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:32:19,225 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:32:19,225 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:32:19,225 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:32:19,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:32:19,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:32:19,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:32:19,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:32:19,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:32:19,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:32:19,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:19,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:32:19,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:32:19,229 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:32:19,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:32:19,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:32:19,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:32:19,230 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_1b694bfc-c754-4401-a9ec-e18705ba1f6b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60fa12f4a8e344f82de5faf31b8f2cbfbaaacd93 [2021-10-11 02:32:19,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:19,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:19,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:19,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:19,526 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:19,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c [2021-10-11 02:32:19,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/data/509bde064/18fc5677af7c43acb23c1b8cccbe2845/FLAG816111fa6 [2021-10-11 02:32:20,108 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:20,109 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c [2021-10-11 02:32:20,115 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/data/509bde064/18fc5677af7c43acb23c1b8cccbe2845/FLAG816111fa6 [2021-10-11 02:32:20,506 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/data/509bde064/18fc5677af7c43acb23c1b8cccbe2845 [2021-10-11 02:32:20,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:20,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:20,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:20,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:20,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:20,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a360955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20, skipping insertion in model container [2021-10-11 02:32:20,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:20,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:20,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:20,706 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:20,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:20,735 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:20,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20 WrapperNode [2021-10-11 02:32:20,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:20,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:20,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:20,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:20,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:20,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:20,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:20,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:20,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... [2021-10-11 02:32:20,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:20,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:20,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:20,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:20,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/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 02:32:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:32:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:20,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:32:21,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:21,173 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:32:21,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:21 BoogieIcfgContainer [2021-10-11 02:32:21,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:21,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:21,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:21,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:21,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:20" (1/3) ... [2021-10-11 02:32:21,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752b2b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:21, skipping insertion in model container [2021-10-11 02:32:21,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:20" (2/3) ... [2021-10-11 02:32:21,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752b2b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:21, skipping insertion in model container [2021-10-11 02:32:21,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:21" (3/3) ... [2021-10-11 02:32:21,184 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers1-2.c [2021-10-11 02:32:21,199 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:21,203 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-10-11 02:32:21,215 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-11 02:32:21,237 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:21,237 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:32:21,237 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:21,237 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:21,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:21,238 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:21,238 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:21,238 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 02:32:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:32:21,274 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:21,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:32:21,280 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 72397, now seen corresponding path program 1 times [2021-10-11 02:32:21,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:21,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880861622] [2021-10-11 02:32:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:21,540 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 02:32:21,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880861622] [2021-10-11 02:32:21,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:21,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:21,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407642269] [2021-10-11 02:32:21,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:21,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:21,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:21,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:21,565 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2021-10-11 02:32:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:21,594 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-10-11 02:32:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:21,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:32:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:21,604 INFO L225 Difference]: With dead ends: 11 [2021-10-11 02:32:21,614 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:32:21,618 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 02:32:21,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:32:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:32:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:32:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 02:32:21,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2021-10-11 02:32:21,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:21,651 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 02:32:21,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 02:32:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:32:21,652 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:21,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:32:21,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:32:21,654 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:21,658 INFO L82 PathProgramCache]: Analyzing trace with hash 72398, now seen corresponding path program 1 times [2021-10-11 02:32:21,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:21,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072997213] [2021-10-11 02:32:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:21,761 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 02:32:21,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072997213] [2021-10-11 02:32:21,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:21,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:21,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182457305] [2021-10-11 02:32:21,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:21,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:21,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:21,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:21,769 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2021-10-11 02:32:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:21,802 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:32:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:21,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:32:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:21,804 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:32:21,805 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:32:21,806 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 02:32:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:32:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 02:32:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:32:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-11 02:32:21,812 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2021-10-11 02:32:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:21,813 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-11 02:32:21,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-11 02:32:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:32:21,814 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:21,814 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:32:21,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:32:21,816 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:21,817 INFO L82 PathProgramCache]: Analyzing trace with hash 69607475, now seen corresponding path program 1 times [2021-10-11 02:32:21,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:21,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883150560] [2021-10-11 02:32:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:21,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883150560] [2021-10-11 02:32:21,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868419722] [2021-10-11 02:32:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/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 02:32:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:32:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:22,094 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:32:22,095 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2021-10-11 02:32:22,103 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:32:22,138 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2021-10-11 02:32:22,148 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 02:32:22,148 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2021-10-11 02:32:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:22,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:22,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [462553926] [2021-10-11 02:32:22,266 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:32:22,266 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:22,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:22,277 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:22,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:23,011 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:23,507 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-10-11 02:32:23,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:23,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:23,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:32:23,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999664699] [2021-10-11 02:32:23,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:32:23,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:23,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:32:23,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:32:23,571 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2021-10-11 02:32:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:23,676 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-10-11 02:32:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:32:23,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:32:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:23,680 INFO L225 Difference]: With dead ends: 30 [2021-10-11 02:32:23,680 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:32:23,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:32:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:32:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2021-10-11 02:32:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:32:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-11 02:32:23,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 5 [2021-10-11 02:32:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:23,689 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-11 02:32:23,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:32:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-11 02:32:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:32:23,691 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:23,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-11 02:32:23,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:32:23,919 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash -791850794, now seen corresponding path program 1 times [2021-10-11 02:32:23,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:23,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061125870] [2021-10-11 02:32:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:32:23,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061125870] [2021-10-11 02:32:23,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:23,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:23,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277487348] [2021-10-11 02:32:23,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:23,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:23,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:23,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:23,956 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2021-10-11 02:32:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:23,971 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-10-11 02:32:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:23,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-10-11 02:32:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:23,973 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:32:23,974 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:32:23,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:32:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-10-11 02:32:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:32:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-11 02:32:23,979 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-10-11 02:32:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:23,979 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-11 02:32:23,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-11 02:32:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:32:23,980 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:23,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-11 02:32:23,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-11 02:32:23,981 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -791851485, now seen corresponding path program 1 times [2021-10-11 02:32:23,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:23,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385793684] [2021-10-11 02:32:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:24,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385793684] [2021-10-11 02:32:24,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206288214] [2021-10-11 02:32:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/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 02:32:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:24,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:32:24,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:24,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:24,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882903512] [2021-10-11 02:32:24,129 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:32:24,129 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:24,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:24,130 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:24,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:24,440 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:24,824 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-10-11 02:32:25,032 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2021-10-11 02:32:25,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:25,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4] total 11 [2021-10-11 02:32:25,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621854143] [2021-10-11 02:32:25,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:25,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:25,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:25,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:32:25,065 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2021-10-11 02:32:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:25,114 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-11 02:32:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:25,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:32:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:25,115 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:32:25,115 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:32:25,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:32:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:32:25,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:32:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:32:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-11 02:32:25,119 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2021-10-11 02:32:25,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:25,119 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-11 02:32:25,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:25,119 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-11 02:32:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:32:25,120 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:25,120 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:25,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-11 02:32:25,331 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash -760047734, now seen corresponding path program 1 times [2021-10-11 02:32:25,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:25,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86807393] [2021-10-11 02:32:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:32:25,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86807393] [2021-10-11 02:32:25,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231925911] [2021-10-11 02:32:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:32:25,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:32:25,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:32:25,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:32:25,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [4] total 5 [2021-10-11 02:32:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894259309] [2021-10-11 02:32:25,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:25,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:25,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:25,459 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2021-10-11 02:32:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:25,465 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-10-11 02:32:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:25,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-10-11 02:32:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:25,466 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:32:25,467 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:32:25,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:32:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-11 02:32:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:32:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-11 02:32:25,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2021-10-11 02:32:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:25,475 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-11 02:32:25,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-11 02:32:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:32:25,476 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:25,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:32:25,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-11 02:32:25,690 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash -760048425, now seen corresponding path program 1 times [2021-10-11 02:32:25,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:25,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420140543] [2021-10-11 02:32:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:32:25,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420140543] [2021-10-11 02:32:25,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163090698] [2021-10-11 02:32:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:25,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:32:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:32:25,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:32:25,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843867740] [2021-10-11 02:32:25,870 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:32:25,870 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:25,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:25,871 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:25,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:26,314 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:26,710 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-10-11 02:32:26,989 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-10-11 02:32:27,022 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:27,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:27,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-10-11 02:32:27,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419245319] [2021-10-11 02:32:27,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:32:27,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:27,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:32:27,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:32:27,024 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 9 states. [2021-10-11 02:32:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:27,061 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-11 02:32:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:32:27,062 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2021-10-11 02:32:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:27,062 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:32:27,062 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:32:27,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:32:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:32:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-10-11 02:32:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:32:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-11 02:32:27,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2021-10-11 02:32:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:27,065 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-11 02:32:27,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:32:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-10-11 02:32:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:32:27,066 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:27,066 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-10-11 02:32:27,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:27,287 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash 992727266, now seen corresponding path program 2 times [2021-10-11 02:32:27,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:27,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465366678] [2021-10-11 02:32:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:27,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465366678] [2021-10-11 02:32:27,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809813502] [2021-10-11 02:32:27,372 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_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:27,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:32:27,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:32:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-11 02:32:27,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-11 02:32:27,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:32:27,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2021-10-11 02:32:27,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113243435] [2021-10-11 02:32:27,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:27,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:27,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:32:27,574 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2021-10-11 02:32:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:27,593 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-10-11 02:32:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:32:27,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-10-11 02:32:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:27,594 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:32:27,594 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:32:27,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:32:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:32:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:32:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:32:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-11 02:32:27,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2021-10-11 02:32:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:27,598 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-11 02:32:27,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-11 02:32:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:32:27,598 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:27,599 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1] [2021-10-11 02:32:27,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:27,818 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:27,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:27,819 INFO L82 PathProgramCache]: Analyzing trace with hash -943284157, now seen corresponding path program 2 times [2021-10-11 02:32:27,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:27,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053054409] [2021-10-11 02:32:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:32:27,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053054409] [2021-10-11 02:32:27,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645313697] [2021-10-11 02:32:27,903 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_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:27,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:32:27,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:27,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:32:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:32:28,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-11 02:32:28,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2142026560] [2021-10-11 02:32:28,156 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:32:28,156 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:28,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:28,157 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:28,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:28,566 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:29,018 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-10-11 02:32:29,323 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-10-11 02:32:29,379 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:29,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:29,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2021-10-11 02:32:29,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213845813] [2021-10-11 02:32:29,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-10-11 02:32:29,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:29,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-11 02:32:29,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:32:29,380 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 17 states. [2021-10-11 02:32:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:29,717 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-11 02:32:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-11 02:32:29,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-10-11 02:32:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:29,719 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:32:29,719 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 02:32:29,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2021-10-11 02:32:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 02:32:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-10-11 02:32:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:32:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-11 02:32:29,722 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2021-10-11 02:32:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:29,723 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-11 02:32:29,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-10-11 02:32:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-11 02:32:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:32:29,723 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:29,723 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1] [2021-10-11 02:32:29,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:29,924 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash 753108029, now seen corresponding path program 1 times [2021-10-11 02:32:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:29,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546010547] [2021-10-11 02:32:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-11 02:32:29,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546010547] [2021-10-11 02:32:29,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:29,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:29,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874691881] [2021-10-11 02:32:29,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:29,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:29,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:29,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:29,951 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2021-10-11 02:32:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:29,965 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-11 02:32:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:29,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-10-11 02:32:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:29,966 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:32:29,967 INFO L226 Difference]: Without dead ends: 27 [2021-10-11 02:32:29,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-11 02:32:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-11 02:32:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:32:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-11 02:32:29,970 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2021-10-11 02:32:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:29,970 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-11 02:32:29,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-11 02:32:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 02:32:29,971 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:29,971 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 1, 1, 1] [2021-10-11 02:32:29,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-10-11 02:32:29,971 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:29,972 INFO L82 PathProgramCache]: Analyzing trace with hash -193347302, now seen corresponding path program 3 times [2021-10-11 02:32:29,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:29,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740295032] [2021-10-11 02:32:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-11 02:32:30,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740295032] [2021-10-11 02:32:30,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821322150] [2021-10-11 02:32:30,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:30,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:32:30,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:30,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-11 02:32:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:30,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:30,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708930347] [2021-10-11 02:32:30,841 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:32:30,841 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:30,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:30,842 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:30,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:31,222 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:31,804 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-10-11 02:32:32,109 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-10-11 02:32:32,294 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:32,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:32,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2021-10-11 02:32:32,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333437751] [2021-10-11 02:32:32,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-10-11 02:32:32,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:32,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-11 02:32:32,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-10-11 02:32:32,296 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 33 states. [2021-10-11 02:32:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:33,319 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-10-11 02:32:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-11 02:32:33,320 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 26 [2021-10-11 02:32:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:33,321 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:32:33,321 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 02:32:33,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=602, Invalid=2478, Unknown=0, NotChecked=0, Total=3080 [2021-10-11 02:32:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 02:32:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-10-11 02:32:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-10-11 02:32:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-10-11 02:32:33,327 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2021-10-11 02:32:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:33,327 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-10-11 02:32:33,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-10-11 02:32:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-10-11 02:32:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-11 02:32:33,328 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:33,328 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 8, 8, 1, 1, 1] [2021-10-11 02:32:33,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-10-11 02:32:33,543 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash 516543565, now seen corresponding path program 4 times [2021-10-11 02:32:33,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:33,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918509849] [2021-10-11 02:32:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-10-11 02:32:33,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918509849] [2021-10-11 02:32:33,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284798234] [2021-10-11 02:32:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:32:33,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-10-11 02:32:33,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-10-11 02:32:33,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216013339] [2021-10-11 02:32:33,865 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:32:33,866 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:33,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:33,866 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:33,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:34,262 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:34,685 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-10-11 02:32:34,928 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-10-11 02:32:35,137 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:35,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:35,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-10-11 02:32:35,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131454291] [2021-10-11 02:32:35,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:32:35,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:32:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:32:35,139 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 13 states. [2021-10-11 02:32:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:35,190 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-10-11 02:32:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:32:35,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2021-10-11 02:32:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:35,191 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:32:35,191 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:32:35,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:32:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:32:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-11 02:32:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 02:32:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-11 02:32:35,195 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-10-11 02:32:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:35,196 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-11 02:32:35,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:32:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-11 02:32:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-11 02:32:35,197 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:35,197 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2021-10-11 02:32:35,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-10-11 02:32:35,398 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:35,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2127880957, now seen corresponding path program 5 times [2021-10-11 02:32:35,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:35,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921572859] [2021-10-11 02:32:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 91 proven. 19 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-11 02:32:35,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921572859] [2021-10-11 02:32:35,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682417079] [2021-10-11 02:32:35,634 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_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:35,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:32:35,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:32:35,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-11 02:32:35,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-11 02:32:36,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:32:36,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 5] total 22 [2021-10-11 02:32:36,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566631818] [2021-10-11 02:32:36,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:32:36,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:32:36,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:32:36,013 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 6 states. [2021-10-11 02:32:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:36,079 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-10-11 02:32:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:32:36,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2021-10-11 02:32:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:36,082 INFO L225 Difference]: With dead ends: 44 [2021-10-11 02:32:36,082 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:32:36,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:32:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:32:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:32:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:32:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:32:36,083 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2021-10-11 02:32:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:36,084 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:32:36,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:32:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:32:36,084 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:32:36,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:36,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:32:36 BoogieIcfgContainer [2021-10-11 02:32:36,311 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:32:36,312 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:32:36,312 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:32:36,312 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:32:36,313 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:21" (3/4) ... [2021-10-11 02:32:36,317 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:32:36,327 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-11 02:32:36,327 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:32:36,327 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:32:36,328 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:32:36,353 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b694bfc-c754-4401-a9ec-e18705ba1f6b/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:32:36,354 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:32:36,354 INFO L168 Benchmark]: Toolchain (without parser) took 15844.35 ms. Allocated memory was 115.3 MB in the beginning and 262.1 MB in the end (delta: 146.8 MB). Free memory was 81.6 MB in the beginning and 130.8 MB in the end (delta: -49.1 MB). Peak memory consumption was 97.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,355 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 115.3 MB. Free memory was 86.1 MB in the beginning and 86.1 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:36,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.44 ms. Allocated memory is still 115.3 MB. Free memory was 81.3 MB in the beginning and 92.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.17 ms. Allocated memory is still 115.3 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,356 INFO L168 Benchmark]: Boogie Preprocessor took 24.71 ms. Allocated memory is still 115.3 MB. Free memory was 91.1 MB in the beginning and 90.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:36,356 INFO L168 Benchmark]: RCFGBuilder took 378.50 ms. Allocated memory is still 115.3 MB. Free memory was 90.0 MB in the beginning and 71.6 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,357 INFO L168 Benchmark]: TraceAbstraction took 15134.03 ms. Allocated memory was 115.3 MB in the beginning and 262.1 MB in the end (delta: 146.8 MB). Free memory was 71.6 MB in the beginning and 132.8 MB in the end (delta: -61.2 MB). Peak memory consumption was 88.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,357 INFO L168 Benchmark]: Witness Printer took 41.95 ms. Allocated memory is still 262.1 MB. Free memory was 132.8 MB in the beginning and 130.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:36,359 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 115.3 MB. Free memory was 86.1 MB in the beginning and 86.1 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 224.44 ms. Allocated memory is still 115.3 MB. Free memory was 81.3 MB in the beginning and 92.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.17 ms. Allocated memory is still 115.3 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.71 ms. Allocated memory is still 115.3 MB. Free memory was 91.1 MB in the beginning and 90.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 378.50 ms. Allocated memory is still 115.3 MB. Free memory was 90.0 MB in the beginning and 71.6 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15134.03 ms. Allocated memory was 115.3 MB in the beginning and 262.1 MB in the end (delta: 146.8 MB). Free memory was 71.6 MB in the beginning and 132.8 MB in the end (delta: -61.2 MB). Peak memory consumption was 88.2 MB. Max. memory is 16.1 GB. * Witness Printer took 41.95 ms. Allocated memory is still 262.1 MB. Free memory was 132.8 MB in the beginning and 130.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.0s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 227 SDslu, 67 SDs, 0 SdLazy, 576 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 347 SyntacticMatches, 25 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=12, 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, 13 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 378 NumberOfCodeBlocks, 325 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 519 ConstructedInterpolants, 0 QuantifiedInterpolants, 93284 SizeOfPredicates, 32 NumberOfNonLiveVariables, 689 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 31 InterpolantComputations, 8 PerfectInterpolantSequences, 1202/1639 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 311, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME[ms]: 178, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 12, TOOLS_QUANTIFIERELIM_TIME[ms]: 174, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 66, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 26, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 47, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 62, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 8, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 9, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 172, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 172, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 2, DAG_COMPRESSION_PROCESSED_NODES: 52, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...