./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF --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 cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:27:19,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:27:19,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:27:20,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:27:20,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:27:20,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:27:20,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:27:20,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:27:20,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:27:20,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:27:20,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:27:20,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:27:20,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:27:20,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:27:20,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:27:20,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:27:20,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:27:20,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:27:20,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:27:20,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:27:20,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:27:20,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:27:20,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:27:20,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:27:20,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:27:20,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:27:20,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:27:20,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:27:20,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:27:20,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:27:20,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:27:20,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:27:20,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:27:20,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:27:20,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:27:20,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:27:20,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:27:20,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:27:20,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:27:20,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:27:20,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:27:20,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-13 02:27:20,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:27:20,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:27:20,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:27:20,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:27:20,185 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:27:20,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:27:20,185 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:27:20,185 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:27:20,186 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:27:20,186 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:27:20,186 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:27:20,186 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:27:20,187 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:27:20,187 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:27:20,187 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:27:20,187 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:27:20,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 02:27:20,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 02:27:20,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:27:20,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:27:20,189 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 02:27:20,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:27:20,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:27:20,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:27:20,190 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 02:27:20,190 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 02:27:20,191 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 02:27:20,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:27:20,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:27:20,191 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:27:20,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:27:20,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:27:20,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:27:20,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:27:20,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:27:20,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:27:20,193 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:27:20,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:27:20,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:27:20,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:27:20,194 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_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c [2021-11-13 02:27:20,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:27:20,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:27:20,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:27:20,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:27:20,485 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:27:20,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2021-11-13 02:27:20,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/data/411491b6d/8f97a416976d471c9908e29c079e0367/FLAG5db2d6c45 [2021-11-13 02:27:21,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:27:21,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2021-11-13 02:27:21,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/data/411491b6d/8f97a416976d471c9908e29c079e0367/FLAG5db2d6c45 [2021-11-13 02:27:21,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/data/411491b6d/8f97a416976d471c9908e29c079e0367 [2021-11-13 02:27:21,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:27:21,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:27:21,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:27:21,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:27:21,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:27:21,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:21,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e76a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21, skipping insertion in model container [2021-11-13 02:27:21,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:21,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:27:21,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:27:21,828 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/sv-benchmarks/c/list-ext-properties/simple-ext_1.i[23274,23287] [2021-11-13 02:27:21,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:27:21,851 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:27:21,929 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/sv-benchmarks/c/list-ext-properties/simple-ext_1.i[23274,23287] [2021-11-13 02:27:21,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:27:21,979 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:27:21,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21 WrapperNode [2021-11-13 02:27:21,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:27:21,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:27:21,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:27:21,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:27:21,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:27:22,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:27:22,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:27:22,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:27:22,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:27:22,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:27:22,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:27:22,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:27:22,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (1/1) ... [2021-11-13 02:27:22,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:27:22,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:22,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:27:22,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:27:22,198 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-13 02:27:22,199 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-13 02:27:22,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 02:27:22,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 02:27:22,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:27:22,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:27:22,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:27:22,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:27:22,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:27:22,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:27:22,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:27:22,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:27:22,358 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-13 02:27:22,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:27:22,751 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 02:27:22,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:22 BoogieIcfgContainer [2021-11-13 02:27:22,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:27:22,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:27:22,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:27:22,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:27:22,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:27:21" (1/3) ... [2021-11-13 02:27:22,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9b5536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:22, skipping insertion in model container [2021-11-13 02:27:22,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:21" (2/3) ... [2021-11-13 02:27:22,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9b5536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:22, skipping insertion in model container [2021-11-13 02:27:22,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:22" (3/3) ... [2021-11-13 02:27:22,781 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-ext_1.i [2021-11-13 02:27:22,792 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:27:22,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-13 02:27:22,850 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:27:22,858 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:27:22,859 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-13 02:27:22,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-13 02:27:22,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:22,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-13 02:27:22,886 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash 144472609, now seen corresponding path program 1 times [2021-11-13 02:27:22,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:22,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543120662] [2021-11-13 02:27:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:22,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:23,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:23,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543120662] [2021-11-13 02:27:23,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543120662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:23,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:23,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:23,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46741835] [2021-11-13 02:27:23,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:23,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:27:23,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:23,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:27:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:27:23,161 INFO L87 Difference]: Start difference. First operand has 48 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:23,227 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-13 02:27:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:27:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-13 02:27:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:23,239 INFO L225 Difference]: With dead ends: 48 [2021-11-13 02:27:23,239 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 02:27:23,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:27:23,246 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.39ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:23,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 10 Unknown, 0 Unchecked, 1.35ms Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 44.39ms Time] [2021-11-13 02:27:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 02:27:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-13 02:27:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-11-13 02:27:23,297 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 5 [2021-11-13 02:27:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:23,298 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-11-13 02:27:23,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-11-13 02:27:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 02:27:23,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:23,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 02:27:23,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:27:23,301 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:23,305 INFO L85 PathProgramCache]: Analyzing trace with hash 183758781, now seen corresponding path program 1 times [2021-11-13 02:27:23,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:23,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124559544] [2021-11-13 02:27:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:23,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:23,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:23,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124559544] [2021-11-13 02:27:23,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124559544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:23,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:23,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:23,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127367179] [2021-11-13 02:27:23,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:23,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:27:23,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:27:23,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:23,449 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:23,619 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-13 02:27:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:27:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-13 02:27:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:23,622 INFO L225 Difference]: With dead ends: 57 [2021-11-13 02:27:23,622 INFO L226 Difference]: Without dead ends: 57 [2021-11-13 02:27:23,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:23,629 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.74ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.12ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:23,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 15 Invalid, 79 Unknown, 0 Unchecked, 8.74ms Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 128.12ms Time] [2021-11-13 02:27:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-13 02:27:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-11-13 02:27:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-11-13 02:27:23,654 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 6 [2021-11-13 02:27:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:23,655 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-11-13 02:27:23,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-11-13 02:27:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 02:27:23,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:23,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 02:27:23,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:27:23,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:23,661 INFO L85 PathProgramCache]: Analyzing trace with hash 183758782, now seen corresponding path program 1 times [2021-11-13 02:27:23,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:23,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086567701] [2021-11-13 02:27:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:23,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:23,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:23,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086567701] [2021-11-13 02:27:23,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086567701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:23,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:23,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:23,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675973724] [2021-11-13 02:27:23,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:23,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:27:23,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:27:23,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:23,775 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:23,897 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-13 02:27:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:27:23,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-13 02:27:23,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:23,898 INFO L225 Difference]: With dead ends: 60 [2021-11-13 02:27:23,898 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 02:27:23,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:23,900 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:23,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 19 Invalid, 78 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 99.77ms Time] [2021-11-13 02:27:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 02:27:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-13 02:27:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-13 02:27:23,925 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 6 [2021-11-13 02:27:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:23,925 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-13 02:27:23,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-13 02:27:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 02:27:23,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:23,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:23,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:27:23,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1946737033, now seen corresponding path program 1 times [2021-11-13 02:27:23,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:23,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499178879] [2021-11-13 02:27:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:23,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:24,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:24,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499178879] [2021-11-13 02:27:24,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499178879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:24,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:24,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:27:24,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536492165] [2021-11-13 02:27:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:24,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:27:24,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:27:24,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:24,032 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:24,106 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-11-13 02:27:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:27:24,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-13 02:27:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:24,107 INFO L225 Difference]: With dead ends: 58 [2021-11-13 02:27:24,108 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 02:27:24,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:24,120 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.18ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:24,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 30 Invalid, 54 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 65.18ms Time] [2021-11-13 02:27:24,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 02:27:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-11-13 02:27:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-11-13 02:27:24,131 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 10 [2021-11-13 02:27:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:24,131 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-11-13 02:27:24,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-11-13 02:27:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 02:27:24,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:24,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:24,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:27:24,133 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash -221270335, now seen corresponding path program 1 times [2021-11-13 02:27:24,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:24,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45776664] [2021-11-13 02:27:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:24,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:24,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:24,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45776664] [2021-11-13 02:27:24,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45776664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:24,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:24,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:27:24,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552700177] [2021-11-13 02:27:24,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:24,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:27:24,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:24,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:27:24,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:27:24,365 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:24,690 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-11-13 02:27:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:27:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 02:27:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:24,692 INFO L225 Difference]: With dead ends: 59 [2021-11-13 02:27:24,692 INFO L226 Difference]: Without dead ends: 59 [2021-11-13 02:27:24,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:27:24,694 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.13ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:24,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 68 Invalid, 161 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 159.13ms Time] [2021-11-13 02:27:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-13 02:27:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-13 02:27:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.5) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-13 02:27:24,700 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 11 [2021-11-13 02:27:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:24,700 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-13 02:27:24,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-13 02:27:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:27:24,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:24,701 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:24,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:27:24,702 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:24,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1198442593, now seen corresponding path program 1 times [2021-11-13 02:27:24,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:24,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22914407] [2021-11-13 02:27:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:24,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:24,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:24,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22914407] [2021-11-13 02:27:24,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22914407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:24,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:24,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:27:24,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241288664] [2021-11-13 02:27:24,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:24,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:27:24,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:27:24,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:24,807 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:24,947 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-11-13 02:27:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:27:24,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 02:27:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:24,950 INFO L225 Difference]: With dead ends: 66 [2021-11-13 02:27:24,950 INFO L226 Difference]: Without dead ends: 66 [2021-11-13 02:27:24,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:27:24,952 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:24,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 52 Invalid, 121 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 108.61ms Time] [2021-11-13 02:27:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-13 02:27:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-11-13 02:27:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.45) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-11-13 02:27:24,962 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 12 [2021-11-13 02:27:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:24,962 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-11-13 02:27:24,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-11-13 02:27:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:27:24,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:24,966 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:24,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:27:24,967 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:24,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1198442592, now seen corresponding path program 1 times [2021-11-13 02:27:24,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:24,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913978962] [2021-11-13 02:27:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:24,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:25,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:25,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913978962] [2021-11-13 02:27:25,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913978962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:25,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:25,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:27:25,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534874936] [2021-11-13 02:27:25,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:25,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:27:25,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:27:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:25,092 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:25,270 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-13 02:27:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:27:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 02:27:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:25,272 INFO L225 Difference]: With dead ends: 61 [2021-11-13 02:27:25,273 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 02:27:25,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:27:25,274 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.17ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:25,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 67 Invalid, 121 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 122.17ms Time] [2021-11-13 02:27:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 02:27:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2021-11-13 02:27:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-13 02:27:25,291 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 12 [2021-11-13 02:27:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:25,292 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-13 02:27:25,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-13 02:27:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 02:27:25,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:25,294 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:25,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 02:27:25,295 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:25,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:25,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2107766282, now seen corresponding path program 1 times [2021-11-13 02:27:25,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:25,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038253477] [2021-11-13 02:27:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:25,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:25,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:25,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038253477] [2021-11-13 02:27:25,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038253477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:25,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791268705] [2021-11-13 02:27:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:25,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:25,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:25,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:27:25,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:27:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 02:27:25,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:25,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-13 02:27:25,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-13 02:27:26,147 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-13 02:27:26,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2021-11-13 02:27:26,163 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-13 02:27:26,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-13 02:27:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:26,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:26,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-11-13 02:27:26,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2021-11-13 02:27:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:26,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791268705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:27:26,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199927458] [2021-11-13 02:27:26,589 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-13 02:27:26,589 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:27:26,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:27:26,599 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:27:26,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:27:26,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,641 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 02:27:26,645 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-13 02:27:26,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-11-13 02:27:26,665 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_42|], 10=[|v_#valid_50|]} [2021-11-13 02:27:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 02:27:26,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:27:26,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:27:26,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:26,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 02:27:26,736 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:27:26,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:27:26,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:26,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,750 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-13 02:27:26,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:110, output treesize:97 [2021-11-13 02:27:26,780 INFO L180 QuantifierPusher]: treesize reduction 9, result has 94.5 percent of original size [2021-11-13 02:27:26,785 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,788 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-13 02:27:26,801 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-11-13 02:27:26,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-11-13 02:27:26,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,823 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,824 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-13 02:27:26,825 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,826 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-11-13 02:27:26,828 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,829 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-13 02:27:26,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 166 [2021-11-13 02:27:26,845 INFO L446 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_29|, |v_#memory_$Pointer$.offset_29|], 6=[|v_#memory_int_23|]} [2021-11-13 02:27:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-13 02:27:26,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:27:26,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:27:26,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:26,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-13 02:27:26,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,876 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:27:26,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-13 02:27:26,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:26,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-13 02:27:26,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 02:27:26,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 02:27:26,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:26,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,924 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-13 02:27:26,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,926 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:162, output treesize:128 [2021-11-13 02:27:26,939 INFO L180 QuantifierPusher]: treesize reduction 12, result has 93.8 percent of original size [2021-11-13 02:27:26,943 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-13 02:27:26,945 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,945 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-13 02:27:26,946 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:27:26,947 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-13 02:27:26,953 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.3 percent of original size 174 [2021-11-13 02:27:26,957 INFO L446 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_30|, |v_#memory_$Pointer$.offset_30|], 12=[|v_#memory_int_24|]} [2021-11-13 02:27:26,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:27:26,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:27:26,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:27:26,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:26,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:27:26,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,987 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:27:26,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:26,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-13 02:27:26,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:27:26,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:27,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:27,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:27,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:27,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-11-13 02:27:27,045 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:27,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 02:27:27,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:27,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 02:27:27,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-13 02:27:27,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:27,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:27,065 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-13 02:27:27,068 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-11-13 02:27:27,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:27:27,069 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:173, output treesize:143 [2021-11-13 02:27:27,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:27,088 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-13 02:27:27,098 INFO L180 QuantifierPusher]: treesize reduction 12, result has 94.3 percent of original size [2021-11-13 02:27:27,107 INFO L185 QuantifierPusher]: treesize reduction 12, result has 92.8 percent of original size 155 [2021-11-13 02:27:27,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:27,128 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-13 02:27:27,140 INFO L180 QuantifierPusher]: treesize reduction 12, result has 94.3 percent of original size [2021-11-13 02:27:27,149 INFO L185 QuantifierPusher]: treesize reduction 12, result has 93.1 percent of original size 161 [2021-11-13 02:27:27,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:27,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:27,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:27,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:27:27,247 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:27:29,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1199927458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:29,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:27:29,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7, 7] total 20 [2021-11-13 02:27:29,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422756301] [2021-11-13 02:27:29,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:29,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:27:29,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:29,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:27:29,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:27:29,399 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:29,654 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-11-13 02:27:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:27:29,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 02:27:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:29,655 INFO L225 Difference]: With dead ends: 57 [2021-11-13 02:27:29,655 INFO L226 Difference]: Without dead ends: 57 [2021-11-13 02:27:29,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:27:29,657 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 247.29ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:29,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 126 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [17 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 247.29ms Time] [2021-11-13 02:27:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-13 02:27:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2021-11-13 02:27:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.368421052631579) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-13 02:27:29,661 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 13 [2021-11-13 02:27:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:29,661 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-13 02:27:29,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-13 02:27:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 02:27:29,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:29,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:29,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:27:29,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 02:27:29,868 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash 103470743, now seen corresponding path program 1 times [2021-11-13 02:27:29,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:29,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885495334] [2021-11-13 02:27:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:29,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:27:29,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:29,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885495334] [2021-11-13 02:27:29,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885495334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:29,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:29,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:29,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031578793] [2021-11-13 02:27:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:29,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:27:29,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:27:29,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:29,915 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:29,979 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-13 02:27:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:27:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-13 02:27:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:29,980 INFO L225 Difference]: With dead ends: 57 [2021-11-13 02:27:29,980 INFO L226 Difference]: Without dead ends: 57 [2021-11-13 02:27:29,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:29,984 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.45ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:29,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 52.45ms Time] [2021-11-13 02:27:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-13 02:27:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-11-13 02:27:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-13 02:27:29,994 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 16 [2021-11-13 02:27:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:29,994 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-13 02:27:29,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:27:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-13 02:27:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 02:27:29,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:29,997 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:29,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 02:27:29,997 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-13 02:27:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash -384957409, now seen corresponding path program 1 times [2021-11-13 02:27:29,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:29,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746402573] [2021-11-13 02:27:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:29,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:30,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:30,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746402573] [2021-11-13 02:27:30,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746402573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:30,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325663272] [2021-11-13 02:27:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:30,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:30,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:27:30,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f3e8ce-5468-485c-b3fa-34554834be94/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:27:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 02:27:30,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:30,439 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 02:27:30,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 02:27:30,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 02:27:30,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:27:30,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-13 02:27:30,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 02:27:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-13 02:27:30,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-13 02:27:30,656 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 02:27:30,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-11-13 02:27:30,731 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-13 02:27:30,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2021-11-13 02:27:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:30,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:30,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:30,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-11-13 02:27:37,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:27:37,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-13 02:27:42,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1452 treesize of output 1436 [2021-11-13 02:27:42,729 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-13 02:27:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1436 treesize of output 1435