./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs --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 20a70402cc893fb2c7adec21ca8a267adc3c5cbb ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:09:18,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:09:18,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:09:18,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:09:18,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:09:18,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:09:18,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:09:18,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:09:18,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:09:18,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:09:18,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:09:18,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:09:18,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:09:18,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:09:18,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:09:18,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:09:18,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:09:18,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:09:18,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:09:18,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:09:18,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:09:18,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:09:18,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:09:18,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:09:18,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:09:18,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:09:18,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:09:18,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:09:18,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:09:18,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:09:18,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:09:18,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:09:18,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:09:18,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:09:18,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:09:18,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:09:18,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:09:18,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:09:18,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:09:18,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:09:18,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:09:18,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 03:09:18,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:09:18,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:09:18,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:09:18,474 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:09:18,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:09:18,474 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:09:18,474 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:09:18,475 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:09:18,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:09:18,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:09:18,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:09:18,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:09:18,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:09:18,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:09:18,476 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:09:18,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:09:18,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:09:18,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:09:18,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:09:18,478 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:09:18,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:09:18,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:09:18,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:09:18,479 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:09:18,479 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:09:18,479 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:09:18,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:09:18,480 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:09:18,480 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:09:18,480 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:09:18,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:09:18,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:09:18,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:18,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:09:18,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:09:18,481 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:09:18,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:09:18,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:09:18,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:09:18,482 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_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20a70402cc893fb2c7adec21ca8a267adc3c5cbb [2021-10-16 03:09:18,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:09:18,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:09:18,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:09:18,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:09:18,800 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:09:18,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/locks/test_locks_9.c [2021-10-16 03:09:18,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/data/97f01c75a/df8b9a71247240d39f43c77aadbe57f1/FLAGc74170568 [2021-10-16 03:09:19,474 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:09:19,479 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/sv-benchmarks/c/locks/test_locks_9.c [2021-10-16 03:09:19,499 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/data/97f01c75a/df8b9a71247240d39f43c77aadbe57f1/FLAGc74170568 [2021-10-16 03:09:19,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/data/97f01c75a/df8b9a71247240d39f43c77aadbe57f1 [2021-10-16 03:09:19,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:09:19,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:09:19,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:19,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:09:19,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:09:19,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:19" (1/1) ... [2021-10-16 03:09:19,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611b1d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:19, skipping insertion in model container [2021-10-16 03:09:19,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:09:19" (1/1) ... [2021-10-16 03:09:19,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:09:19,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:09:20,081 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_3788a649-1f5a-4c5f-8d7e-a50d255e590a/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-10-16 03:09:20,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:20,094 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:09:20,118 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_3788a649-1f5a-4c5f-8d7e-a50d255e590a/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-10-16 03:09:20,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:09:20,131 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:09:20,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20 WrapperNode [2021-10-16 03:09:20,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:09:20,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:20,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:09:20,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:09:20,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:09:20,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:09:20,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:09:20,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:09:20,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:09:20,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:09:20,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:09:20,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:09:20,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (1/1) ... [2021-10-16 03:09:20,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:09:20,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:09:20,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:09:20,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:09:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:09:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:09:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:09:20,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:09:20,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:09:20,860 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-16 03:09:20,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:20 BoogieIcfgContainer [2021-10-16 03:09:20,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:09:20,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:09:20,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:09:20,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:09:20,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:09:19" (1/3) ... [2021-10-16 03:09:20,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9f7f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:20, skipping insertion in model container [2021-10-16 03:09:20,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:09:20" (2/3) ... [2021-10-16 03:09:20,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9f7f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:09:20, skipping insertion in model container [2021-10-16 03:09:20,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:20" (3/3) ... [2021-10-16 03:09:20,879 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2021-10-16 03:09:20,890 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:09:20,891 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 03:09:20,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:09:20,965 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, mConcurrency=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 [2021-10-16 03:09:20,966 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 03:09:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 26 states have internal predecessors, (46), 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) [2021-10-16 03:09:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 03:09:20,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:20,991 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 03:09:20,992 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash 6504784, now seen corresponding path program 1 times [2021-10-16 03:09:21,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:21,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218734181] [2021-10-16 03:09:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:21,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:21,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:21,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218734181] [2021-10-16 03:09:21,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218734181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:21,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:21,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:09:21,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424551402] [2021-10-16 03:09:21,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:09:21,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:21,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:09:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:09:21,276 INFO L87 Difference]: Start difference. First operand has 27 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 26 states have internal predecessors, (46), 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) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-16 03:09:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:21,293 INFO L93 Difference]: Finished difference Result 27 states and 44 transitions. [2021-10-16 03:09:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:09:21,294 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-16 03:09:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:21,309 INFO L225 Difference]: With dead ends: 27 [2021-10-16 03:09:21,310 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 03:09:21,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:09:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 03:09:21,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-16 03:09:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 25 states have internal predecessors, (43), 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) [2021-10-16 03:09:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 43 transitions. [2021-10-16 03:09:21,352 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 43 transitions. Word has length 4 [2021-10-16 03:09:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:21,353 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 43 transitions. [2021-10-16 03:09:21,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-16 03:09:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 43 transitions. [2021-10-16 03:09:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:09:21,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:21,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 03:09:21,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:09:21,356 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:21,362 INFO L82 PathProgramCache]: Analyzing trace with hash 196133148, now seen corresponding path program 1 times [2021-10-16 03:09:21,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:21,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969627965] [2021-10-16 03:09:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:21,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:21,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:21,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969627965] [2021-10-16 03:09:21,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969627965] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:21,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:21,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 03:09:21,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887994018] [2021-10-16 03:09:21,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:09:21,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:09:21,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:09:21,432 INFO L87 Difference]: Start difference. First operand 26 states and 43 transitions. Second operand has 3 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) [2021-10-16 03:09:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:21,437 INFO L93 Difference]: Finished difference Result 25 states and 42 transitions. [2021-10-16 03:09:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:09:21,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2021-10-16 03:09:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:21,439 INFO L225 Difference]: With dead ends: 25 [2021-10-16 03:09:21,439 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 03:09:21,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:09:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 03:09:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-16 03:09:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 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) [2021-10-16 03:09:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 40 transitions. [2021-10-16 03:09:21,445 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 40 transitions. Word has length 5 [2021-10-16 03:09:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:21,446 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 40 transitions. [2021-10-16 03:09:21,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2021-10-16 03:09:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 40 transitions. [2021-10-16 03:09:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:09:21,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:21,447 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:09:21,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:09:21,448 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1790632122, now seen corresponding path program 1 times [2021-10-16 03:09:21,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:21,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933782739] [2021-10-16 03:09:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:21,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:21,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:21,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933782739] [2021-10-16 03:09:21,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933782739] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:21,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:21,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:21,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973681221] [2021-10-16 03:09:21,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:21,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,519 INFO L87 Difference]: Start difference. First operand 23 states and 40 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-10-16 03:09:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:21,547 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2021-10-16 03:09:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2021-10-16 03:09:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:21,549 INFO L225 Difference]: With dead ends: 43 [2021-10-16 03:09:21,549 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 03:09:21,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 03:09:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2021-10-16 03:09:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 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) [2021-10-16 03:09:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 39 transitions. [2021-10-16 03:09:21,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 39 transitions. Word has length 6 [2021-10-16 03:09:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 39 transitions. [2021-10-16 03:09:21,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-10-16 03:09:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 39 transitions. [2021-10-16 03:09:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:09:21,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:21,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:21,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 03:09:21,557 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash -324765394, now seen corresponding path program 1 times [2021-10-16 03:09:21,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:21,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160774469] [2021-10-16 03:09:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:21,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:21,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160774469] [2021-10-16 03:09:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160774469] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:21,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:21,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:21,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227047663] [2021-10-16 03:09:21,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:21,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,640 INFO L87 Difference]: Start difference. First operand 23 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-10-16 03:09:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:21,679 INFO L93 Difference]: Finished difference Result 41 states and 69 transitions. [2021-10-16 03:09:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-10-16 03:09:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:21,682 INFO L225 Difference]: With dead ends: 41 [2021-10-16 03:09:21,683 INFO L226 Difference]: Without dead ends: 41 [2021-10-16 03:09:21,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-16 03:09:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2021-10-16 03:09:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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) [2021-10-16 03:09:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 38 transitions. [2021-10-16 03:09:21,694 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 38 transitions. Word has length 7 [2021-10-16 03:09:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:21,695 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 38 transitions. [2021-10-16 03:09:21,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-10-16 03:09:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 38 transitions. [2021-10-16 03:09:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:09:21,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:21,698 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:21,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 03:09:21,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1477578609, now seen corresponding path program 1 times [2021-10-16 03:09:21,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:21,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837685493] [2021-10-16 03:09:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:21,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:21,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:21,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837685493] [2021-10-16 03:09:21,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837685493] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:21,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:21,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:21,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898053709] [2021-10-16 03:09:21,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:21,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:21,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,801 INFO L87 Difference]: Start difference. First operand 23 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-16 03:09:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:21,832 INFO L93 Difference]: Finished difference Result 39 states and 64 transitions. [2021-10-16 03:09:21,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:21,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-10-16 03:09:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:21,834 INFO L225 Difference]: With dead ends: 39 [2021-10-16 03:09:21,835 INFO L226 Difference]: Without dead ends: 39 [2021-10-16 03:09:21,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-16 03:09:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2021-10-16 03:09:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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) [2021-10-16 03:09:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 37 transitions. [2021-10-16 03:09:21,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 37 transitions. Word has length 8 [2021-10-16 03:09:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:21,844 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 37 transitions. [2021-10-16 03:09:21,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-16 03:09:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 37 transitions. [2021-10-16 03:09:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:09:21,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:21,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:21,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 03:09:21,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:21,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1439917731, now seen corresponding path program 1 times [2021-10-16 03:09:21,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:21,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063795625] [2021-10-16 03:09:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:21,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:21,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:21,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063795625] [2021-10-16 03:09:21,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063795625] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:21,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:21,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:21,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032772359] [2021-10-16 03:09:21,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:21,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:21,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,913 INFO L87 Difference]: Start difference. First operand 23 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 03:09:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:21,931 INFO L93 Difference]: Finished difference Result 37 states and 59 transitions. [2021-10-16 03:09:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:21,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-10-16 03:09:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:21,933 INFO L225 Difference]: With dead ends: 37 [2021-10-16 03:09:21,933 INFO L226 Difference]: Without dead ends: 37 [2021-10-16 03:09:21,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-16 03:09:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2021-10-16 03:09:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2021-10-16 03:09:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 36 transitions. [2021-10-16 03:09:21,938 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 36 transitions. Word has length 9 [2021-10-16 03:09:21,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:21,938 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 36 transitions. [2021-10-16 03:09:21,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 03:09:21,939 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 36 transitions. [2021-10-16 03:09:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 03:09:21,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:21,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:21,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 03:09:21,940 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:21,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1687991396, now seen corresponding path program 1 times [2021-10-16 03:09:21,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:21,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678938557] [2021-10-16 03:09:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:21,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:21,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:21,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678938557] [2021-10-16 03:09:21,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678938557] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:21,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:21,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:21,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884390724] [2021-10-16 03:09:21,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:21,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:21,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:21,990 INFO L87 Difference]: Start difference. First operand 23 states and 36 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-10-16 03:09:22,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:22,012 INFO L93 Difference]: Finished difference Result 35 states and 54 transitions. [2021-10-16 03:09:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:22,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2021-10-16 03:09:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:22,014 INFO L225 Difference]: With dead ends: 35 [2021-10-16 03:09:22,014 INFO L226 Difference]: Without dead ends: 35 [2021-10-16 03:09:22,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-16 03:09:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-10-16 03:09:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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) [2021-10-16 03:09:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 35 transitions. [2021-10-16 03:09:22,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 35 transitions. Word has length 10 [2021-10-16 03:09:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:22,031 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 35 transitions. [2021-10-16 03:09:22,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-10-16 03:09:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 35 transitions. [2021-10-16 03:09:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:09:22,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:22,032 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:22,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 03:09:22,033 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:22,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:22,033 INFO L82 PathProgramCache]: Analyzing trace with hash 788340760, now seen corresponding path program 1 times [2021-10-16 03:09:22,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:22,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151633717] [2021-10-16 03:09:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:22,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:22,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:22,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151633717] [2021-10-16 03:09:22,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151633717] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:22,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:22,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:22,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908968895] [2021-10-16 03:09:22,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:22,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,109 INFO L87 Difference]: Start difference. First operand 23 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-16 03:09:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:22,128 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2021-10-16 03:09:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:22,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2021-10-16 03:09:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:22,130 INFO L225 Difference]: With dead ends: 33 [2021-10-16 03:09:22,130 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 03:09:22,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 03:09:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-10-16 03:09:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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) [2021-10-16 03:09:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2021-10-16 03:09:22,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 11 [2021-10-16 03:09:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:22,135 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2021-10-16 03:09:22,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-16 03:09:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2021-10-16 03:09:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 03:09:22,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:22,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:22,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 03:09:22,137 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1331024839, now seen corresponding path program 1 times [2021-10-16 03:09:22,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:22,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404851754] [2021-10-16 03:09:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:22,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:22,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:22,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404851754] [2021-10-16 03:09:22,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404851754] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:22,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:22,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:22,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417725950] [2021-10-16 03:09:22,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:22,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,181 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-10-16 03:09:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:22,197 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2021-10-16 03:09:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:22,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2021-10-16 03:09:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:22,199 INFO L225 Difference]: With dead ends: 31 [2021-10-16 03:09:22,199 INFO L226 Difference]: Without dead ends: 31 [2021-10-16 03:09:22,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-16 03:09:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-16 03:09:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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) [2021-10-16 03:09:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2021-10-16 03:09:22,203 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 12 [2021-10-16 03:09:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:22,203 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2021-10-16 03:09:22,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2021-10-16 03:09:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2021-10-16 03:09:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 03:09:22,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:22,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:22,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 03:09:22,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1688118669, now seen corresponding path program 1 times [2021-10-16 03:09:22,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:22,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006627450] [2021-10-16 03:09:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:22,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:22,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:22,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006627450] [2021-10-16 03:09:22,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006627450] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:22,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:22,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:22,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116116051] [2021-10-16 03:09:22,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:22,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,248 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-10-16 03:09:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:22,263 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-10-16 03:09:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:22,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 [2021-10-16 03:09:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:22,265 INFO L225 Difference]: With dead ends: 29 [2021-10-16 03:09:22,265 INFO L226 Difference]: Without dead ends: 29 [2021-10-16 03:09:22,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-16 03:09:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-10-16 03:09:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 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) [2021-10-16 03:09:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2021-10-16 03:09:22,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2021-10-16 03:09:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:22,269 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2021-10-16 03:09:22,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-10-16 03:09:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2021-10-16 03:09:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:09:22,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:09:22,271 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:09:22,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 03:09:22,271 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:09:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:09:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 792287246, now seen corresponding path program 1 times [2021-10-16 03:09:22,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:09:22,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792710143] [2021-10-16 03:09:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:09:22,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:09:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:09:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:09:22,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:09:22,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792710143] [2021-10-16 03:09:22,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792710143] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:09:22,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:09:22,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 03:09:22,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775944381] [2021-10-16 03:09:22,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:09:22,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:09:22,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:09:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,313 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-16 03:09:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:09:22,327 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2021-10-16 03:09:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:09:22,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-10-16 03:09:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:09:22,328 INFO L225 Difference]: With dead ends: 23 [2021-10-16 03:09:22,328 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 03:09:22,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:09:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 03:09:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 03:09:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-16 03:09:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 03:09:22,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-16 03:09:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:09:22,330 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 03:09:22,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-16 03:09:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 03:09:22,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 03:09:22,334 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:09:22,335 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:09:22,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 03:09:22,340 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:09:22,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:09:22 BoogieIcfgContainer [2021-10-16 03:09:22,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:09:22,344 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:09:22,344 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:09:22,345 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:09:22,345 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:09:20" (3/4) ... [2021-10-16 03:09:22,349 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 03:09:22,362 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-16 03:09:22,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-16 03:09:22,364 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-16 03:09:22,364 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 03:09:22,424 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:09:22,424 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:09:22,426 INFO L168 Benchmark]: Toolchain (without parser) took 2574.28 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 87.2 MB in the beginning and 102.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 38.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:22,427 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 117.4 MB. Free memory is still 72.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:09:22,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.33 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 86.9 MB in the beginning and 144.8 MB in the end (delta: -58.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:22,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.41 ms. Allocated memory is still 172.0 MB. Free memory was 144.2 MB in the beginning and 143.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:09:22,429 INFO L168 Benchmark]: Boogie Preprocessor took 26.52 ms. Allocated memory is still 172.0 MB. Free memory was 143.1 MB in the beginning and 141.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:22,430 INFO L168 Benchmark]: RCFGBuilder took 668.32 ms. Allocated memory is still 172.0 MB. Free memory was 141.5 MB in the beginning and 122.1 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:22,430 INFO L168 Benchmark]: TraceAbstraction took 1474.25 ms. Allocated memory is still 172.0 MB. Free memory was 121.2 MB in the beginning and 106.6 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:22,431 INFO L168 Benchmark]: Witness Printer took 80.59 ms. Allocated memory is still 172.0 MB. Free memory was 106.6 MB in the beginning and 102.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:09:22,433 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 117.4 MB. Free memory is still 72.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.33 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 86.9 MB in the beginning and 144.8 MB in the end (delta: -58.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.41 ms. Allocated memory is still 172.0 MB. Free memory was 144.2 MB in the beginning and 143.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.52 ms. Allocated memory is still 172.0 MB. Free memory was 143.1 MB in the beginning and 141.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 668.32 ms. Allocated memory is still 172.0 MB. Free memory was 141.5 MB in the beginning and 122.1 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1474.25 ms. Allocated memory is still 172.0 MB. Free memory was 121.2 MB in the beginning and 106.6 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 80.59 ms. Allocated memory is still 172.0 MB. Free memory was 106.6 MB in the beginning and 102.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 149]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1390.5ms, OverallIterations: 11, TraceHistogramMax: 1, EmptinessCheckTime: 19.3ms, AutomataDifference: 310.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 382 SDtfs, 289 SDslu, 434 SDs, 0 SdLazy, 89 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 117.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.8ms AutomataMinimizationTime, 11 MinimizatonAttempts, 104 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 30.8ms SsaConstructionTime, 177.1ms SatisfiabilityAnalysisTime, 481.0ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-16 03:09:22,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3788a649-1f5a-4c5f-8d7e-a50d255e590a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...