./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:24:29,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:24:29,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:24:29,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:24:29,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:24:29,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:24:29,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:24:29,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:24:29,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:24:29,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:24:29,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:24:29,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:24:29,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:24:29,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:24:29,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:24:29,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:24:29,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:24:29,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:24:29,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:24:29,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:24:29,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:24:29,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:24:29,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:24:29,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:24:29,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:24:29,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:24:29,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:24:29,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:24:29,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:24:29,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:24:29,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:24:29,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:24:29,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:24:29,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:24:29,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:24:29,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:24:29,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:24:29,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:24:29,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:24:29,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:24:29,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:24:29,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:24:29,632 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:24:29,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:24:29,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:24:29,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:24:29,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:24:29,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:24:29,635 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:24:29,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:24:29,635 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:24:29,636 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:24:29,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:24:29,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:24:29,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:24:29,637 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:24:29,638 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:24:29,638 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:24:29,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:24:29,638 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:24:29,639 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:24:29,639 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:24:29,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:24:29,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:24:29,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:24:29,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:24:29,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:24:29,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:24:29,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:24:29,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:24:29,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:24:29,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-10-28 09:24:29,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:24:29,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:24:29,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:24:29,961 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:24:29,962 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:24:29,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-properties/simple-2.i [2021-10-28 09:24:30,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data/8bcb98b9b/5fdcd6aacb754fe88f097278879d9b31/FLAG4859e98be [2021-10-28 09:24:30,594 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:24:30,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/sv-benchmarks/c/list-properties/simple-2.i [2021-10-28 09:24:30,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data/8bcb98b9b/5fdcd6aacb754fe88f097278879d9b31/FLAG4859e98be [2021-10-28 09:24:30,939 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data/8bcb98b9b/5fdcd6aacb754fe88f097278879d9b31 [2021-10-28 09:24:30,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:24:30,945 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:24:30,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:24:30,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:24:30,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:24:30,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:24:30" (1/1) ... [2021-10-28 09:24:30,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2225a04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:30, skipping insertion in model container [2021-10-28 09:24:30,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:24:30" (1/1) ... [2021-10-28 09:24:30,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:24:31,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:24:31,312 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_7f253e04-d7a6-4aca-9a59-20dd964be6e7/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-28 09:24:31,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:24:31,323 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:24:31,366 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_7f253e04-d7a6-4aca-9a59-20dd964be6e7/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-28 09:24:31,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:24:31,402 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:24:31,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31 WrapperNode [2021-10-28 09:24:31,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:24:31,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:24:31,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:24:31,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:24:31,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (1/1) ... [2021-10-28 09:24:31,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (1/1) ... [2021-10-28 09:24:31,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (1/1) ... [2021-10-28 09:24:31,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (1/1) ... [2021-10-28 09:24:31,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (1/1) ... [2021-10-28 09:24:31,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (1/1) ... [2021-10-28 09:24:31,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (1/1) ... [2021-10-28 09:24:31,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:24:31,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:24:31,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:24:31,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:24:31,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (1/1) ... [2021-10-28 09:24:31,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:24:31,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:31,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:24:31,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:24:31,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:24:31,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:24:31,533 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:24:31,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:24:31,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:24:31,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:24:31,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:24:31,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:24:31,534 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 09:24:31,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:24:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:24:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:24:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:24:31,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:24:31,536 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:24:31,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:24:31,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:24:31,536 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:24:31,536 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:24:31,536 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:24:31,537 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:24:31,537 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:24:31,537 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:24:31,537 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:24:31,537 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:24:31,537 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:24:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:24:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:24:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:24:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:24:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:24:31,538 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:24:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:24:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:24:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:24:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:24:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:24:31,539 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:24:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:24:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:24:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:24:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:24:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:24:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:24:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:24:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:24:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:24:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:24:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:24:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:24:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:24:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:24:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:24:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:24:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:24:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:24:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:24:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:24:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:24:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:24:31,543 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:24:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:24:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:24:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:24:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:24:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:24:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:24:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:24:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:24:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:24:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:24:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:24:31,545 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:24:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:24:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:24:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:24:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:24:31,546 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:24:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:24:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:24:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:24:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:24:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:24:31,547 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:24:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:24:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:24:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:24:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:24:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:24:31,548 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:24:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:24:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:24:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:24:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:24:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:24:31,549 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:24:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:24:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:24:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:24:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:24:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:24:31,550 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:24:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:24:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:24:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:24:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:24:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:24:31,551 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:24:31,552 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:24:31,552 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:24:31,552 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:24:31,552 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:24:31,552 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:24:31,553 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:24:31,553 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:24:31,553 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:24:31,553 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:24:31,553 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:24:31,553 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 09:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:24:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:24:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:24:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:24:31,810 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 09:24:32,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:24:32,009 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 09:24:32,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:32 BoogieIcfgContainer [2021-10-28 09:24:32,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:24:32,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:24:32,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:24:32,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:24:32,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:24:30" (1/3) ... [2021-10-28 09:24:32,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b7201f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:24:32, skipping insertion in model container [2021-10-28 09:24:32,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:31" (2/3) ... [2021-10-28 09:24:32,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b7201f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:24:32, skipping insertion in model container [2021-10-28 09:24:32,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:32" (3/3) ... [2021-10-28 09:24:32,036 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-10-28 09:24:32,043 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:24:32,044 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-28 09:24:32,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:24:32,089 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:24:32,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-10-28 09:24:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:24:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:24:32,111 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:32,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:32,112 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash 875395723, now seen corresponding path program 1 times [2021-10-28 09:24:32,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:32,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337953280] [2021-10-28 09:24:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:32,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:32,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:32,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:32,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337953280] [2021-10-28 09:24:32,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337953280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:32,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:32,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:24:32,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956065305] [2021-10-28 09:24:32,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:24:32,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:32,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:24:32,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:24:32,456 INFO L87 Difference]: Start difference. First operand has 50 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:32,546 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-10-28 09:24:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:24:32,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:24:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:32,554 INFO L225 Difference]: With dead ends: 50 [2021-10-28 09:24:32,555 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 09:24:32,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:24:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 09:24:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-28 09:24:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-10-28 09:24:32,588 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 10 [2021-10-28 09:24:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:32,589 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-10-28 09:24:32,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-10-28 09:24:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:24:32,590 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:32,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:32,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:24:32,590 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1367438898, now seen corresponding path program 1 times [2021-10-28 09:24:32,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:32,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469847084] [2021-10-28 09:24:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:32,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:32,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:32,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:32,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469847084] [2021-10-28 09:24:32,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469847084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:32,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:32,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:24:32,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106516043] [2021-10-28 09:24:32,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:24:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:24:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:24:32,688 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:32,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:32,831 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-10-28 09:24:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:24:32,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:24:32,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:32,834 INFO L225 Difference]: With dead ends: 51 [2021-10-28 09:24:32,834 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:24:32,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:24:32,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:24:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-10-28 09:24:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.6) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-10-28 09:24:32,841 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 11 [2021-10-28 09:24:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:32,841 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-10-28 09:24:32,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-10-28 09:24:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:24:32,842 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:32,842 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:32,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:24:32,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1367438899, now seen corresponding path program 1 times [2021-10-28 09:24:32,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:32,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715253642] [2021-10-28 09:24:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:32,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:32,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:32,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:32,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715253642] [2021-10-28 09:24:32,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715253642] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:32,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:32,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:24:32,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134666915] [2021-10-28 09:24:32,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:24:32,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:32,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:24:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:24:32,997 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:33,115 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-10-28 09:24:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:24:33,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:24:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:33,117 INFO L225 Difference]: With dead ends: 60 [2021-10-28 09:24:33,117 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:24:33,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:24:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:24:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2021-10-28 09:24:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 48 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-10-28 09:24:33,132 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2021-10-28 09:24:33,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-10-28 09:24:33,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-10-28 09:24:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:24:33,134 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:33,134 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:33,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:24:33,134 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:33,139 INFO L85 PathProgramCache]: Analyzing trace with hash 707569559, now seen corresponding path program 1 times [2021-10-28 09:24:33,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:33,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638231688] [2021-10-28 09:24:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:33,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:33,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:33,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638231688] [2021-10-28 09:24:33,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638231688] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:33,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:33,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:24:33,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025456033] [2021-10-28 09:24:33,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:24:33,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:33,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:24:33,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:24:33,256 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:33,338 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-10-28 09:24:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:24:33,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 09:24:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:33,363 INFO L225 Difference]: With dead ends: 57 [2021-10-28 09:24:33,363 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 09:24:33,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:24:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 09:24:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-10-28 09:24:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-10-28 09:24:33,385 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 16 [2021-10-28 09:24:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:33,385 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-10-28 09:24:33,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-10-28 09:24:33,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:24:33,386 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:33,386 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:33,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:24:33,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash 459860759, now seen corresponding path program 1 times [2021-10-28 09:24:33,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:33,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997893159] [2021-10-28 09:24:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:33,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:33,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:33,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997893159] [2021-10-28 09:24:33,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997893159] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:33,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:33,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:24:33,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359094718] [2021-10-28 09:24:33,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:24:33,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:24:33,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:24:33,574 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:33,740 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-10-28 09:24:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:24:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 09:24:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:33,745 INFO L225 Difference]: With dead ends: 89 [2021-10-28 09:24:33,745 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 09:24:33,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:24:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 09:24:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2021-10-28 09:24:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 52 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-10-28 09:24:33,769 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 17 [2021-10-28 09:24:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:33,770 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-10-28 09:24:33,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-10-28 09:24:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:24:33,771 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:33,771 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:33,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:24:33,772 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash 976099109, now seen corresponding path program 1 times [2021-10-28 09:24:33,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:33,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160319548] [2021-10-28 09:24:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:33,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:33,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:33,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:33,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160319548] [2021-10-28 09:24:33,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160319548] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:33,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:33,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:24:33,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986846461] [2021-10-28 09:24:33,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:24:33,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:24:33,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:24:33,875 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:34,045 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-10-28 09:24:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:24:34,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:24:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:34,047 INFO L225 Difference]: With dead ends: 68 [2021-10-28 09:24:34,048 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 09:24:34,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:24:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 09:24:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2021-10-28 09:24:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-10-28 09:24:34,061 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 19 [2021-10-28 09:24:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:34,061 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-10-28 09:24:34,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-10-28 09:24:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:24:34,065 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:34,065 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:34,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:24:34,065 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:34,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash 976099110, now seen corresponding path program 1 times [2021-10-28 09:24:34,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:34,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791545295] [2021-10-28 09:24:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:34,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:34,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:34,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791545295] [2021-10-28 09:24:34,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791545295] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:34,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:34,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:24:34,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196334067] [2021-10-28 09:24:34,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:24:34,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:34,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:24:34,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:24:34,249 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:34,463 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-10-28 09:24:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:24:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:24:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:34,465 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:24:34,465 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:24:34,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:24:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:24:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2021-10-28 09:24:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-10-28 09:24:34,476 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 19 [2021-10-28 09:24:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:34,476 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-10-28 09:24:34,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-10-28 09:24:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:24:34,478 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:34,478 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:34,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:24:34,478 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1228946458, now seen corresponding path program 1 times [2021-10-28 09:24:34,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:34,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761506848] [2021-10-28 09:24:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:34,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:34,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:34,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:34,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761506848] [2021-10-28 09:24:34,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761506848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:34,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048504220] [2021-10-28 09:24:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:34,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:34,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:34,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:34,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:24:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:34,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:24:34,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:34,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:24:34,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:24:35,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-28 09:24:35,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-28 09:24:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:35,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048504220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:35,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:35,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-10-28 09:24:35,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912673077] [2021-10-28 09:24:35,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:24:35,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:35,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:24:35,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:24:35,087 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:35,298 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-10-28 09:24:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:24:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 09:24:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:35,299 INFO L225 Difference]: With dead ends: 59 [2021-10-28 09:24:35,299 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 09:24:35,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:24:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 09:24:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-10-28 09:24:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.205128205128205) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-10-28 09:24:35,302 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 20 [2021-10-28 09:24:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:35,302 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-10-28 09:24:35,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-10-28 09:24:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:24:35,303 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:35,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:35,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:35,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:35,504 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 557364199, now seen corresponding path program 1 times [2021-10-28 09:24:35,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:35,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379853487] [2021-10-28 09:24:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:35,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:24:35,518 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:24:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:24:35,559 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:24:35,559 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:24:35,560 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr15ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:24:35,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:24:35,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:24:35,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:24:35,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:24:35,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:24:35,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:24:35,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:24:35,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:24:35,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 09:24:35,565 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 09:24:35,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 09:24:35,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 09:24:35,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:24:35,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 09:24:35,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 09:24:35,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:24:35,579 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:35,585 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:24:35,605 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 09:24:35,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:24:35 BoogieIcfgContainer [2021-10-28 09:24:35,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:24:35,628 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:24:35,628 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:24:35,628 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:24:35,629 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:32" (3/4) ... [2021-10-28 09:24:35,633 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:24:35,634 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:24:35,635 INFO L168 Benchmark]: Toolchain (without parser) took 4689.14 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 59.8 MB in the beginning and 96.1 MB in the end (delta: -36.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:24:35,635 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 100.7 MB. Free memory is still 77.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:24:35,636 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.67 ms. Allocated memory is still 100.7 MB. Free memory was 59.6 MB in the beginning and 68.8 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:35,637 INFO L168 Benchmark]: Boogie Preprocessor took 51.98 ms. Allocated memory is still 100.7 MB. Free memory was 68.8 MB in the beginning and 66.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:35,638 INFO L168 Benchmark]: RCFGBuilder took 567.48 ms. Allocated memory is still 100.7 MB. Free memory was 66.2 MB in the beginning and 45.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:35,638 INFO L168 Benchmark]: TraceAbstraction took 3602.17 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 45.2 MB in the beginning and 96.1 MB in the end (delta: -50.9 MB). Peak memory consumption was 33.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:35,638 INFO L168 Benchmark]: Witness Printer took 5.74 ms. Allocated memory is still 123.7 MB. Free memory is still 96.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:24:35,640 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 100.7 MB. Free memory is still 77.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 455.67 ms. Allocated memory is still 100.7 MB. Free memory was 59.6 MB in the beginning and 68.8 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.98 ms. Allocated memory is still 100.7 MB. Free memory was 68.8 MB in the beginning and 66.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 567.48 ms. Allocated memory is still 100.7 MB. Free memory was 66.2 MB in the beginning and 45.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3602.17 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 45.2 MB in the beginning and 96.1 MB in the end (delta: -50.9 MB). Peak memory consumption was 33.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.74 ms. Allocated memory is still 123.7 MB. Free memory is still 96.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={-1:0}, p={-1:0}] [L544] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L545] p = a VAL [a={-1:0}, p={-1:0}] [L546] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L547] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 69 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 233 SDtfs, 410 SDslu, 407 SDs, 0 SdLazy, 902 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=5, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 861 SizeOfPredicates, 8 NumberOfNonLiveVariables, 125 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 09:24:35,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:24:38,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:24:38,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:24:38,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:24:38,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:24:38,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:24:38,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:24:38,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:24:38,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:24:38,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:24:38,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:24:38,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:24:38,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:24:38,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:24:38,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:24:38,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:24:38,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:24:38,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:24:38,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:24:38,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:24:38,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:24:38,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:24:38,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:24:38,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:24:38,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:24:38,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:24:38,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:24:38,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:24:38,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:24:38,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:24:38,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:24:38,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:24:38,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:24:38,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:24:38,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:24:38,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:24:38,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:24:38,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:24:38,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:24:38,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:24:38,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:24:38,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 09:24:38,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:24:38,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:24:38,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:24:38,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:24:38,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:24:38,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:24:38,208 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:24:38,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:24:38,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:24:38,209 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:24:38,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:24:38,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:24:38,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:24:38,210 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:24:38,211 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:24:38,211 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:24:38,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:24:38,211 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:24:38,211 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 09:24:38,212 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 09:24:38,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:24:38,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:24:38,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:24:38,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:24:38,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:24:38,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:24:38,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:24:38,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:24:38,214 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 09:24:38,214 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 09:24:38,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:24:38,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 09:24:38,215 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-10-28 09:24:38,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:24:38,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:24:38,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:24:38,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:24:38,606 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:24:38,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-properties/simple-2.i [2021-10-28 09:24:38,672 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data/24088430b/7c66715d6d19484e8da910d96e68db48/FLAG0af04dea7 [2021-10-28 09:24:39,162 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:24:39,162 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/sv-benchmarks/c/list-properties/simple-2.i [2021-10-28 09:24:39,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data/24088430b/7c66715d6d19484e8da910d96e68db48/FLAG0af04dea7 [2021-10-28 09:24:39,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/data/24088430b/7c66715d6d19484e8da910d96e68db48 [2021-10-28 09:24:39,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:24:39,508 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:24:39,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:24:39,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:24:39,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:24:39,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:24:39" (1/1) ... [2021-10-28 09:24:39,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac435d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:39, skipping insertion in model container [2021-10-28 09:24:39,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:24:39" (1/1) ... [2021-10-28 09:24:39,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:24:39,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:24:39,949 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_7f253e04-d7a6-4aca-9a59-20dd964be6e7/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-28 09:24:39,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:24:39,974 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:24:40,044 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_7f253e04-d7a6-4aca-9a59-20dd964be6e7/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-28 09:24:40,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:24:40,090 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:24:40,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40 WrapperNode [2021-10-28 09:24:40,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:24:40,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:24:40,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:24:40,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:24:40,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (1/1) ... [2021-10-28 09:24:40,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (1/1) ... [2021-10-28 09:24:40,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (1/1) ... [2021-10-28 09:24:40,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (1/1) ... [2021-10-28 09:24:40,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (1/1) ... [2021-10-28 09:24:40,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (1/1) ... [2021-10-28 09:24:40,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (1/1) ... [2021-10-28 09:24:40,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:24:40,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:24:40,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:24:40,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:24:40,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (1/1) ... [2021-10-28 09:24:40,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:24:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:40,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:24:40,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:24:40,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:24:40,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:24:40,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 09:24:40,258 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:24:40,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:24:40,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:24:40,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:24:40,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:24:40,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:24:40,259 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 09:24:40,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:24:40,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:24:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:24:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:24:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:24:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:24:40,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:24:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:24:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:24:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:24:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:24:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:24:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:24:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:24:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:24:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:24:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:24:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:24:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:24:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:24:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:24:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:24:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:24:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:24:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:24:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:24:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:24:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:24:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:24:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:24:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:24:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:24:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:24:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:24:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:24:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:24:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:24:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:24:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:24:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:24:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:24:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:24:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:24:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:24:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:24:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:24:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:24:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:24:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:24:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:24:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:24:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:24:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:24:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:24:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:24:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:24:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:24:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:24:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:24:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:24:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:24:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:24:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:24:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:24:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:24:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:24:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:24:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:24:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:24:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:24:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:24:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:24:40,272 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:24:40,272 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:24:40,272 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:24:40,272 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:24:40,272 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:24:40,272 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:24:40,273 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:24:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:24:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:24:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:24:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:24:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:24:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:24:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:24:40,274 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:24:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:24:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:24:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:24:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:24:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:24:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:24:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:24:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:24:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:24:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:24:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:24:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:24:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:24:40,276 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:24:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:24:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:24:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 09:24:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:24:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:24:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 09:24:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:24:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:24:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 09:24:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:24:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 09:24:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:24:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 09:24:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 09:24:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 09:24:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:24:40,721 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 09:24:40,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:24:40,987 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 09:24:40,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:40 BoogieIcfgContainer [2021-10-28 09:24:40,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:24:40,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:24:40,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:24:40,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:24:40,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:24:39" (1/3) ... [2021-10-28 09:24:40,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa39d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:24:40, skipping insertion in model container [2021-10-28 09:24:40,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:24:40" (2/3) ... [2021-10-28 09:24:40,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa39d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:24:40, skipping insertion in model container [2021-10-28 09:24:40,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:40" (3/3) ... [2021-10-28 09:24:40,998 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-10-28 09:24:41,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:24:41,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-28 09:24:41,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:24:41,062 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:24:41,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-10-28 09:24:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:24:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:24:41,080 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:41,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:41,081 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1701322882, now seen corresponding path program 1 times [2021-10-28 09:24:41,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:24:41,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157542766] [2021-10-28 09:24:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:41,097 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:24:41,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:24:41,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:24:41,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 09:24:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:24:41,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:41,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:24:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:41,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:24:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:41,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:24:41,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157542766] [2021-10-28 09:24:41,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157542766] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:41,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:41,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 09:24:41,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220306218] [2021-10-28 09:24:41,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:24:41,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:24:41,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:24:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:24:41,547 INFO L87 Difference]: Start difference. First operand has 49 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:41,769 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-10-28 09:24:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:24:41,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:24:41,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:41,777 INFO L225 Difference]: With dead ends: 57 [2021-10-28 09:24:41,790 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 09:24:41,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:24:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 09:24:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-10-28 09:24:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-10-28 09:24:41,821 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 10 [2021-10-28 09:24:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:41,822 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-10-28 09:24:41,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-10-28 09:24:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:24:41,823 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:41,824 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:41,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:42,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:24:42,036 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1701322883, now seen corresponding path program 1 times [2021-10-28 09:24:42,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:24:42,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144678013] [2021-10-28 09:24:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:42,045 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:24:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:24:42,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:24:42,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 09:24:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:24:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:42,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:24:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:42,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:24:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:42,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:24:42,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144678013] [2021-10-28 09:24:42,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144678013] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:42,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:42,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-28 09:24:42,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50319358] [2021-10-28 09:24:42,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:24:42,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:24:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:24:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:24:42,525 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:42,824 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-10-28 09:24:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:24:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:24:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:42,826 INFO L225 Difference]: With dead ends: 58 [2021-10-28 09:24:42,826 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 09:24:42,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:24:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 09:24:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2021-10-28 09:24:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.457142857142857) internal successors, (51), 46 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-10-28 09:24:42,834 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 10 [2021-10-28 09:24:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:42,834 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-10-28 09:24:42,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-10-28 09:24:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:24:42,835 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:42,835 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:42,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:43,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:24:43,051 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:43,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash 932559388, now seen corresponding path program 1 times [2021-10-28 09:24:43,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:24:43,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609284188] [2021-10-28 09:24:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:43,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:24:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:24:43,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:24:43,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 09:24:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:24:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:43,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:24:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:43,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:24:43,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609284188] [2021-10-28 09:24:43,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609284188] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:43,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:43,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 09:24:43,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145192941] [2021-10-28 09:24:43,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:24:43,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:24:43,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:24:43,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:24:43,375 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:43,544 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-10-28 09:24:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:24:43,545 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 09:24:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:43,546 INFO L225 Difference]: With dead ends: 55 [2021-10-28 09:24:43,546 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 09:24:43,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:24:43,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 09:24:43,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2021-10-28 09:24:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-10-28 09:24:43,552 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 15 [2021-10-28 09:24:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:43,552 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-10-28 09:24:43,553 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-10-28 09:24:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:24:43,553 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:43,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:43,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:43,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:24:43,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1155389113, now seen corresponding path program 1 times [2021-10-28 09:24:43,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:24:43,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007211292] [2021-10-28 09:24:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:43,762 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:24:43,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:24:43,766 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:24:43,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 09:24:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:43,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:24:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:44,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:24:44,093 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 09:24:44,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 09:24:44,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:24:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:44,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:24:44,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2021-10-28 09:24:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:44,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:24:44,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007211292] [2021-10-28 09:24:44,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007211292] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:44,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:44,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-28 09:24:44,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641529807] [2021-10-28 09:24:44,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:24:44,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:24:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:24:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:24:44,342 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:44,725 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2021-10-28 09:24:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:24:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 09:24:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:44,727 INFO L225 Difference]: With dead ends: 86 [2021-10-28 09:24:44,727 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 09:24:44,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:24:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 09:24:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-10-28 09:24:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-10-28 09:24:44,734 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 16 [2021-10-28 09:24:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:44,734 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-10-28 09:24:44,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-10-28 09:24:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:24:44,735 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:44,736 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:44,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-28 09:24:44,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:24:44,955 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash -718408589, now seen corresponding path program 1 times [2021-10-28 09:24:44,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:24:44,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456034420] [2021-10-28 09:24:44,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:44,960 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:24:44,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:24:44,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:24:44,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 09:24:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:45,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:24:45,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:45,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:24:45,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:24:45,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 09:24:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:45,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:24:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:45,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:24:45,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456034420] [2021-10-28 09:24:45,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456034420] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:45,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:45,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 09:24:45,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214567918] [2021-10-28 09:24:45,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:24:45,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:24:45,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:24:45,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:24:45,380 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:45,700 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-10-28 09:24:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:24:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 09:24:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:45,702 INFO L225 Difference]: With dead ends: 66 [2021-10-28 09:24:45,702 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 09:24:45,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:24:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 09:24:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-10-28 09:24:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-10-28 09:24:45,708 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 17 [2021-10-28 09:24:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:45,708 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-10-28 09:24:45,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-10-28 09:24:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:24:45,709 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:45,709 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:45,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:45,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:24:45,911 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash -718408588, now seen corresponding path program 1 times [2021-10-28 09:24:45,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:24:45,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009483317] [2021-10-28 09:24:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:45,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:24:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:24:45,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:24:45,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 09:24:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:24:46,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:46,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:24:46,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:24:46,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-28 09:24:46,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-10-28 09:24:46,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-10-28 09:24:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:46,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:24:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:46,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:24:46,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009483317] [2021-10-28 09:24:46,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009483317] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:24:46,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:24:46,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-28 09:24:46,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64932223] [2021-10-28 09:24:46,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:24:46,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:24:46,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:24:46,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:24:46,633 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:47,452 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-28 09:24:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:24:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 09:24:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:47,457 INFO L225 Difference]: With dead ends: 62 [2021-10-28 09:24:47,457 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 09:24:47,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:24:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 09:24:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-10-28 09:24:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 38 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-28 09:24:47,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 17 [2021-10-28 09:24:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:47,463 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-28 09:24:47,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-28 09:24:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:24:47,464 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:47,464 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:47,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:47,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:24:47,674 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash -324277973, now seen corresponding path program 1 times [2021-10-28 09:24:47,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:24:47,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084547124] [2021-10-28 09:24:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:47,678 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:24:47,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:24:47,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:24:47,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 09:24:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:24:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:47,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:24:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:24:48,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-28 09:24:48,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-28 09:24:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:48,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:24:48,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-28 09:24:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:48,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:24:48,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084547124] [2021-10-28 09:24:48,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084547124] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 09:24:48,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:48,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-10-28 09:24:48,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120985399] [2021-10-28 09:24:48,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:24:48,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:24:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:24:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:24:48,254 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:48,902 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-10-28 09:24:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:24:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:24:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:48,903 INFO L225 Difference]: With dead ends: 57 [2021-10-28 09:24:48,903 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 09:24:48,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:24:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 09:24:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2021-10-28 09:24:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-28 09:24:48,908 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 19 [2021-10-28 09:24:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:48,908 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-28 09:24:48,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-28 09:24:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:24:48,910 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:48,910 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:48,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:49,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:24:49,118 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 09:24:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:49,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1462683817, now seen corresponding path program 1 times [2021-10-28 09:24:49,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:24:49,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982417892] [2021-10-28 09:24:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:49,119 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:24:49,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:24:49,120 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:24:49,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 09:24:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:24:49,303 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:24:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:24:49,363 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 09:24:49,363 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:24:49,364 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr15ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:24:49,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:24:49,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:24:49,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:24:49,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:24:49,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:24:49,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:24:49,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:24:49,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:24:49,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 09:24:49,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 09:24:49,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 09:24:49,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 09:24:49,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:24:49,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 09:24:49,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 09:24:49,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:49,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:24:49,594 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:49,605 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:24:49,627 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 09:24:49,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:24:49 BoogieIcfgContainer [2021-10-28 09:24:49,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:24:49,643 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:24:49,643 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:24:49,643 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:24:49,644 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:24:40" (3/4) ... [2021-10-28 09:24:49,647 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:24:49,647 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:24:49,648 INFO L168 Benchmark]: Toolchain (without parser) took 10138.98 ms. Allocated memory was 69.2 MB in the beginning and 88.1 MB in the end (delta: 18.9 MB). Free memory was 46.0 MB in the beginning and 54.6 MB in the end (delta: -8.6 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:49,648 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 52.4 MB. Free memory is still 32.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:24:49,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 579.19 ms. Allocated memory is still 69.2 MB. Free memory was 45.8 MB in the beginning and 45.3 MB in the end (delta: 520.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:49,649 INFO L168 Benchmark]: Boogie Preprocessor took 76.73 ms. Allocated memory is still 69.2 MB. Free memory was 45.3 MB in the beginning and 42.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:49,649 INFO L168 Benchmark]: RCFGBuilder took 820.86 ms. Allocated memory is still 69.2 MB. Free memory was 42.2 MB in the beginning and 38.6 MB in the end (delta: 3.6 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:49,650 INFO L168 Benchmark]: TraceAbstraction took 8650.50 ms. Allocated memory was 69.2 MB in the beginning and 88.1 MB in the end (delta: 18.9 MB). Free memory was 38.3 MB in the beginning and 55.3 MB in the end (delta: -17.0 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:49,652 INFO L168 Benchmark]: Witness Printer took 3.81 ms. Allocated memory is still 88.1 MB. Free memory is still 54.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:24:49,653 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 52.4 MB. Free memory is still 32.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 579.19 ms. Allocated memory is still 69.2 MB. Free memory was 45.8 MB in the beginning and 45.3 MB in the end (delta: 520.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.73 ms. Allocated memory is still 69.2 MB. Free memory was 45.3 MB in the beginning and 42.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 820.86 ms. Allocated memory is still 69.2 MB. Free memory was 42.2 MB in the beginning and 38.6 MB in the end (delta: 3.6 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8650.50 ms. Allocated memory was 69.2 MB in the beginning and 88.1 MB in the end (delta: 18.9 MB). Free memory was 38.3 MB in the beginning and 55.3 MB in the end (delta: -17.0 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.81 ms. Allocated memory is still 88.1 MB. Free memory is still 54.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={1:0}] [L534] List t; [L535] List p = a; VAL [a={1:0}, p={1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={1:0}, p={1:0}] [L544] p->n = 0 VAL [a={1:0}, p={1:0}] [L545] p = a VAL [a={1:0}, p={1:0}] [L546] COND TRUE p!=0 VAL [a={1:0}, p={1:0}] [L547] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={1:0}, p={1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 74 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 8.5s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 191 SDtfs, 381 SDslu, 443 SDs, 0 SdLazy, 627 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 221 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=4, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 97 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 194 ConstructedInterpolants, 1 QuantifiedInterpolants, 994 SizeOfPredicates, 32 NumberOfNonLiveVariables, 561 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 09:24:49,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f253e04-d7a6-4aca-9a59-20dd964be6e7/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...