./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec2_product13.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec2_product13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a318d1932a4cf515b7769fbc74b3ae8791db0dd09e5b989a4577a3be2cae3270 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:35:59,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:35:59,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:35:59,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:35:59,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:35:59,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:35:59,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:35:59,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:35:59,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:35:59,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:35:59,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:35:59,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:35:59,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:35:59,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:35:59,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:35:59,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:35:59,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:35:59,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:35:59,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:35:59,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:35:59,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:35:59,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:35:59,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:35:59,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:35:59,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:35:59,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:35:59,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:35:59,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:35:59,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:35:59,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:35:59,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:35:59,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:35:59,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:35:59,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:35:59,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:35:59,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:35:59,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:35:59,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:35:59,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:35:59,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:35:59,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:35:59,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-11-18 19:35:59,743 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:35:59,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:35:59,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:35:59,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:35:59,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:35:59,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:35:59,748 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:35:59,748 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-18 19:35:59,748 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-18 19:35:59,749 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-18 19:35:59,750 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-18 19:35:59,750 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-18 19:35:59,750 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-18 19:35:59,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:35:59,751 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:35:59,751 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:35:59,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:35:59,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:35:59,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:35:59,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-18 19:35:59,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-18 19:35:59,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-18 19:35:59,752 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:35:59,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:35:59,754 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-18 19:35:59,754 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:35:59,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-18 19:35:59,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:35:59,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:35:59,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:35:59,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:35:59,757 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-18 19:35:59,757 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a318d1932a4cf515b7769fbc74b3ae8791db0dd09e5b989a4577a3be2cae3270 [2022-11-18 19:36:00,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:36:00,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:36:00,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:36:00,045 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:36:00,045 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:36:00,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/product-lines/minepump_spec2_product13.cil.c [2022-11-18 19:36:00,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/data/cef885e34/ede6fb00ed8a49058311a9f22cca6bbb/FLAG533386479 [2022-11-18 19:36:00,666 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:36:00,666 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/sv-benchmarks/c/product-lines/minepump_spec2_product13.cil.c [2022-11-18 19:36:00,681 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/data/cef885e34/ede6fb00ed8a49058311a9f22cca6bbb/FLAG533386479 [2022-11-18 19:36:00,933 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/data/cef885e34/ede6fb00ed8a49058311a9f22cca6bbb [2022-11-18 19:36:00,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:36:00,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:36:00,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:36:00,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:36:00,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:36:00,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:36:00" (1/1) ... [2022-11-18 19:36:00,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c4ecb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:00, skipping insertion in model container [2022-11-18 19:36:00,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:36:00" (1/1) ... [2022-11-18 19:36:00,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:36:01,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:36:01,254 WARN L234 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_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/sv-benchmarks/c/product-lines/minepump_spec2_product13.cil.c[2562,2575] [2022-11-18 19:36:01,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:36:01,331 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:36:01,347 WARN L234 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_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/sv-benchmarks/c/product-lines/minepump_spec2_product13.cil.c[2562,2575] [2022-11-18 19:36:01,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:36:01,423 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:36:01,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01 WrapperNode [2022-11-18 19:36:01,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:36:01,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:36:01,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:36:01,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:36:01,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,474 INFO L138 Inliner]: procedures = 52, calls = 95, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 319 [2022-11-18 19:36:01,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:36:01,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:36:01,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:36:01,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:36:01,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,505 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:36:01,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:36:01,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:36:01,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:36:01,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (1/1) ... [2022-11-18 19:36:01,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 19:36:01,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:36:01,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 19:36:01,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-18 19:36:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:36:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:36:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:36:01,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:36:01,721 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:36:01,723 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:36:01,980 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:36:01,988 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:36:01,988 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:36:01,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:36:01 BoogieIcfgContainer [2022-11-18 19:36:01,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:36:01,992 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-18 19:36:01,992 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-18 19:36:01,996 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-18 19:36:01,997 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 19:36:01,997 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 07:36:00" (1/3) ... [2022-11-18 19:36:01,998 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1de8d55e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 07:36:01, skipping insertion in model container [2022-11-18 19:36:01,999 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 19:36:01,999 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:36:01" (2/3) ... [2022-11-18 19:36:01,999 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1de8d55e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 07:36:01, skipping insertion in model container [2022-11-18 19:36:01,999 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 19:36:02,000 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:36:01" (3/3) ... [2022-11-18 19:36:02,001 INFO L332 chiAutomizerObserver]: Analyzing ICFG minepump_spec2_product13.cil.c [2022-11-18 19:36:02,088 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-18 19:36:02,098 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-18 19:36:02,099 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-18 19:36:02,099 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-18 19:36:02,099 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-18 19:36:02,100 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-18 19:36:02,100 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-18 19:36:02,100 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-18 19:36:02,120 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 100 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:02,161 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 62 [2022-11-18 19:36:02,161 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 19:36:02,161 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 19:36:02,168 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:02,168 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:02,168 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-18 19:36:02,169 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 100 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:02,181 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 62 [2022-11-18 19:36:02,182 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 19:36:02,185 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 19:36:02,186 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:02,186 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:02,192 INFO L748 eck$LassoCheckResult]: Stem: 88#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(31, 2);call #Ultimate.allocInit(12, 3);call #Ultimate.allocInit(30, 4);call #Ultimate.allocInit(9, 5);call #Ultimate.allocInit(21, 6);call #Ultimate.allocInit(30, 7);call #Ultimate.allocInit(9, 8);call #Ultimate.allocInit(21, 9);call #Ultimate.allocInit(30, 10);call #Ultimate.allocInit(9, 11);call #Ultimate.allocInit(25, 12);call #Ultimate.allocInit(30, 13);call #Ultimate.allocInit(9, 14);call #Ultimate.allocInit(25, 15);~head~0.base, ~head~0.offset := 0, 0;~methAndRunningLastTime~0 := 0;~methaneLevelCritical~0 := 0;~pumpRunning~0 := 0;~waterLevel~0 := 1;~systemActive~0 := 1;~cleanupTimeShifts~0 := 4; 34#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret50#1, main_~retValue_acc~9#1, main_~tmp~7#1;havoc main_~retValue_acc~9#1;havoc main_~tmp~7#1;assume { :begin_inline_select_helpers } true; 7#L677true assume { :end_inline_select_helpers } true;assume { :begin_inline_select_features } true; 41#L670true assume { :end_inline_select_features } true;assume { :begin_inline_valid_product } true;havoc valid_product_#res#1;havoc valid_product_~retValue_acc~6#1;havoc valid_product_~retValue_acc~6#1;valid_product_~retValue_acc~6#1 := 1;valid_product_#res#1 := valid_product_~retValue_acc~6#1; 67#L685true main_#t~ret50#1 := valid_product_#res#1;assume { :end_inline_valid_product } true;main_~tmp~7#1 := main_#t~ret50#1;havoc main_#t~ret50#1; 61#L893true assume 0 != main_~tmp~7#1;assume { :begin_inline_setup } true; 42#L869true assume { :end_inline_setup } true;assume { :begin_inline_runTest } true;assume { :begin_inline___utac_acc__Specification2_spec__1 } true;~methAndRunningLastTime~0 := 0; 17#L777true assume { :end_inline___utac_acc__Specification2_spec__1 } true;assume { :begin_inline_test } true;havoc test_#t~nondet4#1, test_#t~nondet5#1, test_#t~nondet6#1, test_#t~nondet7#1, test_~splverifierCounter~0#1, test_~tmp~0#1, test_~tmp___0~0#1, test_~tmp___1~0#1, test_~tmp___2~0#1;havoc test_~splverifierCounter~0#1;havoc test_~tmp~0#1;havoc test_~tmp___0~0#1;havoc test_~tmp___1~0#1;havoc test_~tmp___2~0#1;test_~splverifierCounter~0#1 := 0; 100#L64-2true [2022-11-18 19:36:02,193 INFO L750 eck$LassoCheckResult]: Loop: 100#L64-2true assume !false; 101#L65true assume test_~splverifierCounter~0#1 < 4; 29#L66true test_~tmp~0#1 := test_#t~nondet4#1;havoc test_#t~nondet4#1; 54#L74true assume !(0 != test_~tmp~0#1); 81#L74-2true test_~tmp___0~0#1 := test_#t~nondet5#1;havoc test_#t~nondet5#1; 86#L84true assume !(0 != test_~tmp___0~0#1); 19#L84-2true test_~tmp___2~0#1 := test_#t~nondet6#1;havoc test_#t~nondet6#1; 87#L94true assume 0 != test_~tmp___2~0#1; 78#L100-2true assume { :begin_inline_timeShift } true; 77#L143true assume !(0 != ~pumpRunning~0); 10#L143-2true assume !(0 != ~systemActive~0); 8#L150-1true assume { :begin_inline___utac_acc__Specification2_spec__2 } true;havoc __utac_acc__Specification2_spec__2_#t~ret48#1, __utac_acc__Specification2_spec__2_#t~ret49#1, __utac_acc__Specification2_spec__2_~tmp~6#1, __utac_acc__Specification2_spec__2_~tmp___0~1#1;havoc __utac_acc__Specification2_spec__2_~tmp~6#1;havoc __utac_acc__Specification2_spec__2_~tmp___0~1#1;assume { :begin_inline_isMethaneLevelCritical } true;havoc isMethaneLevelCritical_#res#1;havoc isMethaneLevelCritical_~retValue_acc~7#1;havoc isMethaneLevelCritical_~retValue_acc~7#1;isMethaneLevelCritical_~retValue_acc~7#1 := ~methaneLevelCritical~0;isMethaneLevelCritical_#res#1 := isMethaneLevelCritical_~retValue_acc~7#1; 28#L734-1true __utac_acc__Specification2_spec__2_#t~ret48#1 := isMethaneLevelCritical_#res#1;assume { :end_inline_isMethaneLevelCritical } true;__utac_acc__Specification2_spec__2_~tmp~6#1 := __utac_acc__Specification2_spec__2_#t~ret48#1;havoc __utac_acc__Specification2_spec__2_#t~ret48#1; 98#L788true assume !(0 != __utac_acc__Specification2_spec__2_~tmp~6#1);~methAndRunningLastTime~0 := 0; 74#L788-1true assume { :end_inline___utac_acc__Specification2_spec__2 } true; 70#L160true assume { :end_inline_timeShift } true; 100#L64-2true [2022-11-18 19:36:02,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash 87859946, now seen corresponding path program 1 times [2022-11-18 19:36:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:02,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619316453] [2022-11-18 19:36:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:02,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:02,345 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:36:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:02,411 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:36:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1631236618, now seen corresponding path program 1 times [2022-11-18 19:36:02,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:02,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127420654] [2022-11-18 19:36:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:02,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:02,447 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:36:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:02,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:36:02,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1468949235, now seen corresponding path program 1 times [2022-11-18 19:36:02,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:02,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389748366] [2022-11-18 19:36:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:02,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:02,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389748366] [2022-11-18 19:36:02,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389748366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:36:02,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:36:02,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:36:02,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129957777] [2022-11-18 19:36:02,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:36:02,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:36:02,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:36:02,908 INFO L87 Difference]: Start difference. First operand has 100 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:36:03,013 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-11-18 19:36:03,014 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 122 transitions. [2022-11-18 19:36:03,017 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 58 [2022-11-18 19:36:03,022 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 87 states and 112 transitions. [2022-11-18 19:36:03,023 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 87 [2022-11-18 19:36:03,024 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 87 [2022-11-18 19:36:03,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 112 transitions. [2022-11-18 19:36:03,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:36:03,025 INFO L218 hiAutomatonCegarLoop]: Abstraction has 87 states and 112 transitions. [2022-11-18 19:36:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states and 112 transitions. [2022-11-18 19:36:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-18 19:36:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 86 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2022-11-18 19:36:03,052 INFO L240 hiAutomatonCegarLoop]: Abstraction has 87 states and 112 transitions. [2022-11-18 19:36:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:36:03,060 INFO L428 stractBuchiCegarLoop]: Abstraction has 87 states and 112 transitions. [2022-11-18 19:36:03,061 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-18 19:36:03,061 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 112 transitions. [2022-11-18 19:36:03,062 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 58 [2022-11-18 19:36:03,062 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 19:36:03,063 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 19:36:03,063 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:03,063 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:03,064 INFO L748 eck$LassoCheckResult]: Stem: 297#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(31, 2);call #Ultimate.allocInit(12, 3);call #Ultimate.allocInit(30, 4);call #Ultimate.allocInit(9, 5);call #Ultimate.allocInit(21, 6);call #Ultimate.allocInit(30, 7);call #Ultimate.allocInit(9, 8);call #Ultimate.allocInit(21, 9);call #Ultimate.allocInit(30, 10);call #Ultimate.allocInit(9, 11);call #Ultimate.allocInit(25, 12);call #Ultimate.allocInit(30, 13);call #Ultimate.allocInit(9, 14);call #Ultimate.allocInit(25, 15);~head~0.base, ~head~0.offset := 0, 0;~methAndRunningLastTime~0 := 0;~methaneLevelCritical~0 := 0;~pumpRunning~0 := 0;~waterLevel~0 := 1;~systemActive~0 := 1;~cleanupTimeShifts~0 := 4; 293#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret50#1, main_~retValue_acc~9#1, main_~tmp~7#1;havoc main_~retValue_acc~9#1;havoc main_~tmp~7#1;assume { :begin_inline_select_helpers } true; 245#L677 assume { :end_inline_select_helpers } true;assume { :begin_inline_select_features } true; 246#L670 assume { :end_inline_select_features } true;assume { :begin_inline_valid_product } true;havoc valid_product_#res#1;havoc valid_product_~retValue_acc~6#1;havoc valid_product_~retValue_acc~6#1;valid_product_~retValue_acc~6#1 := 1;valid_product_#res#1 := valid_product_~retValue_acc~6#1; 263#L685 main_#t~ret50#1 := valid_product_#res#1;assume { :end_inline_valid_product } true;main_~tmp~7#1 := main_#t~ret50#1;havoc main_#t~ret50#1; 252#L893 assume 0 != main_~tmp~7#1;assume { :begin_inline_setup } true; 253#L869 assume { :end_inline_setup } true;assume { :begin_inline_runTest } true;assume { :begin_inline___utac_acc__Specification2_spec__1 } true;~methAndRunningLastTime~0 := 0; 274#L777 assume { :end_inline___utac_acc__Specification2_spec__1 } true;assume { :begin_inline_test } true;havoc test_#t~nondet4#1, test_#t~nondet5#1, test_#t~nondet6#1, test_#t~nondet7#1, test_~splverifierCounter~0#1, test_~tmp~0#1, test_~tmp___0~0#1, test_~tmp___1~0#1, test_~tmp___2~0#1;havoc test_~splverifierCounter~0#1;havoc test_~tmp~0#1;havoc test_~tmp___0~0#1;havoc test_~tmp___1~0#1;havoc test_~tmp___2~0#1;test_~splverifierCounter~0#1 := 0; 271#L64-2 [2022-11-18 19:36:03,064 INFO L750 eck$LassoCheckResult]: Loop: 271#L64-2 assume !false; 301#L65 assume test_~splverifierCounter~0#1 < 4; 287#L66 test_~tmp~0#1 := test_#t~nondet4#1;havoc test_#t~nondet4#1; 227#L74 assume !(0 != test_~tmp~0#1); 229#L74-2 test_~tmp___0~0#1 := test_#t~nondet5#1;havoc test_#t~nondet5#1; 292#L84 assume !(0 != test_~tmp___0~0#1); 240#L84-2 test_~tmp___2~0#1 := test_#t~nondet6#1;havoc test_#t~nondet6#1; 275#L94 assume 0 != test_~tmp___2~0#1; 285#L100-2 assume { :begin_inline_timeShift } true; 283#L143 assume !(0 != ~pumpRunning~0); 221#L143-2 assume 0 != ~systemActive~0;assume { :begin_inline_processEnvironment } true;havoc processEnvironment_#t~ret8#1, processEnvironment_~tmp~1#1;havoc processEnvironment_~tmp~1#1; 224#L175 assume !(0 != ~pumpRunning~0);assume { :begin_inline_processEnvironment__wrappee__methaneQuery } true; 226#L167-1 assume { :end_inline_processEnvironment__wrappee__methaneQuery } true; 249#L175-1 assume { :end_inline_processEnvironment } true; 243#L150-1 assume { :begin_inline___utac_acc__Specification2_spec__2 } true;havoc __utac_acc__Specification2_spec__2_#t~ret48#1, __utac_acc__Specification2_spec__2_#t~ret49#1, __utac_acc__Specification2_spec__2_~tmp~6#1, __utac_acc__Specification2_spec__2_~tmp___0~1#1;havoc __utac_acc__Specification2_spec__2_~tmp~6#1;havoc __utac_acc__Specification2_spec__2_~tmp___0~1#1;assume { :begin_inline_isMethaneLevelCritical } true;havoc isMethaneLevelCritical_#res#1;havoc isMethaneLevelCritical_~retValue_acc~7#1;havoc isMethaneLevelCritical_~retValue_acc~7#1;isMethaneLevelCritical_~retValue_acc~7#1 := ~methaneLevelCritical~0;isMethaneLevelCritical_#res#1 := isMethaneLevelCritical_~retValue_acc~7#1; 244#L734-1 __utac_acc__Specification2_spec__2_#t~ret48#1 := isMethaneLevelCritical_#res#1;assume { :end_inline_isMethaneLevelCritical } true;__utac_acc__Specification2_spec__2_~tmp~6#1 := __utac_acc__Specification2_spec__2_#t~ret48#1;havoc __utac_acc__Specification2_spec__2_#t~ret48#1; 286#L788 assume !(0 != __utac_acc__Specification2_spec__2_~tmp~6#1);~methAndRunningLastTime~0 := 0; 257#L788-1 assume { :end_inline___utac_acc__Specification2_spec__2 } true; 270#L160 assume { :end_inline_timeShift } true; 271#L64-2 [2022-11-18 19:36:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash 87859946, now seen corresponding path program 2 times [2022-11-18 19:36:03,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:03,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105789794] [2022-11-18 19:36:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:03,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:03,076 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:36:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:03,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:36:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash -395509013, now seen corresponding path program 1 times [2022-11-18 19:36:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:03,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178805672] [2022-11-18 19:36:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:03,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:03,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:36:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:03,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:36:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1034239330, now seen corresponding path program 1 times [2022-11-18 19:36:03,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:03,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810810135] [2022-11-18 19:36:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:03,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:03,118 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:36:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:03,132 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:36:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:04,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:36:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:36:04,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 07:36:04 BoogieIcfgContainer [2022-11-18 19:36:04,389 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-18 19:36:04,390 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 19:36:04,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 19:36:04,390 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 19:36:04,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:36:01" (3/4) ... [2022-11-18 19:36:04,393 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-11-18 19:36:04,437 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 19:36:04,437 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 19:36:04,438 INFO L158 Benchmark]: Toolchain (without parser) took 3500.03ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 105.4MB in the beginning and 122.6MB in the end (delta: -17.2MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2022-11-18 19:36:04,438 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 83.9MB. Free memory was 41.6MB in the beginning and 41.6MB in the end (delta: 43.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 19:36:04,439 INFO L158 Benchmark]: CACSL2BoogieTranslator took 483.29ms. Allocated memory is still 136.3MB. Free memory was 105.4MB in the beginning and 103.8MB in the end (delta: 1.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-18 19:36:04,439 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.28ms. Allocated memory is still 136.3MB. Free memory was 103.8MB in the beginning and 101.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 19:36:04,440 INFO L158 Benchmark]: Boogie Preprocessor took 46.87ms. Allocated memory is still 136.3MB. Free memory was 101.4MB in the beginning and 99.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 19:36:04,440 INFO L158 Benchmark]: RCFGBuilder took 468.27ms. Allocated memory is still 136.3MB. Free memory was 99.6MB in the beginning and 82.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-18 19:36:04,440 INFO L158 Benchmark]: BuchiAutomizer took 2397.50ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 82.5MB in the beginning and 124.7MB in the end (delta: -42.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 19:36:04,441 INFO L158 Benchmark]: Witness Printer took 47.62ms. Allocated memory is still 163.6MB. Free memory was 124.7MB in the beginning and 122.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 19:36:04,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 83.9MB. Free memory was 41.6MB in the beginning and 41.6MB in the end (delta: 43.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 483.29ms. Allocated memory is still 136.3MB. Free memory was 105.4MB in the beginning and 103.8MB in the end (delta: 1.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.28ms. Allocated memory is still 136.3MB. Free memory was 103.8MB in the beginning and 101.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.87ms. Allocated memory is still 136.3MB. Free memory was 101.4MB in the beginning and 99.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 468.27ms. Allocated memory is still 136.3MB. Free memory was 99.6MB in the beginning and 82.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * BuchiAutomizer took 2397.50ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 82.5MB in the beginning and 124.7MB in the end (delta: -42.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 47.62ms. Allocated memory is still 163.6MB. Free memory was 124.7MB in the beginning and 122.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 6 locations. The remainder module has 87 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.2s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 1.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 462 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 462 mSDsluCounter, 121 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8 IncrementalHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 117 mSDtfsCounter, 8 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 64]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L455] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L771] int methAndRunningLastTime ; [L692] int methaneLevelCritical = 0; [L135] int pumpRunning = 0; [L691] int waterLevel = 1; [L136] int systemActive = 1; [L810] int cleanupTimeShifts = 4; VAL [cleanupTimeShifts=4, head={0:0}, methAndRunningLastTime=0, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L884] int retValue_acc ; [L885] int tmp ; [L889] FCALL select_helpers() [L890] FCALL select_features() [L891] CALL, EXPR valid_product() [L681] int retValue_acc ; [L684] retValue_acc = 1 [L685] return (retValue_acc); VAL [\result=1, cleanupTimeShifts=4, head={0:0}, methAndRunningLastTime=0, methaneLevelCritical=0, pumpRunning=0, retValue_acc=1, systemActive=1, waterLevel=1] [L891] RET, EXPR valid_product() [L891] tmp = valid_product() [L893] COND TRUE \read(tmp) [L895] FCALL setup() [L896] CALL runTest() [L877] CALL __utac_acc__Specification2_spec__1() [L776] methAndRunningLastTime = 0 VAL [cleanupTimeShifts=4, head={0:0}, methAndRunningLastTime=0, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L877] RET __utac_acc__Specification2_spec__1() [L878] CALL test() [L55] int splverifierCounter ; [L56] int tmp ; [L57] int tmp___0 ; [L58] int tmp___1 ; [L59] int tmp___2 ; [L62] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methAndRunningLastTime=0, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] Loop: [L64] COND TRUE 1 [L66] COND TRUE splverifierCounter < 4 [L72] tmp = __VERIFIER_nondet_int() [L74] COND FALSE !(\read(tmp)) [L82] tmp___0 = __VERIFIER_nondet_int() [L84] COND FALSE !(\read(tmp___0)) [L92] tmp___2 = __VERIFIER_nondet_int() [L94] COND TRUE \read(tmp___2) [L107] CALL timeShift() [L143] COND FALSE !(\read(pumpRunning)) [L150] COND TRUE \read(systemActive) [L152] CALL processEnvironment() [L172] int tmp ; [L175] COND FALSE !(\read(pumpRunning)) [L190] FCALL processEnvironment__wrappee__methaneQuery() [L152] RET processEnvironment() [L158] CALL __utac_acc__Specification2_spec__2() [L781] int tmp ; [L782] int tmp___0 ; [L786] CALL, EXPR isMethaneLevelCritical() [L730] int retValue_acc ; [L733] retValue_acc = methaneLevelCritical [L734] return (retValue_acc); [L786] RET, EXPR isMethaneLevelCritical() [L786] tmp = isMethaneLevelCritical() [L788] COND FALSE !(\read(tmp)) [L804] methAndRunningLastTime = 0 [L158] RET __utac_acc__Specification2_spec__2() [L107] RET timeShift() End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 64]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L455] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L771] int methAndRunningLastTime ; [L692] int methaneLevelCritical = 0; [L135] int pumpRunning = 0; [L691] int waterLevel = 1; [L136] int systemActive = 1; [L810] int cleanupTimeShifts = 4; VAL [cleanupTimeShifts=4, head={0:0}, methAndRunningLastTime=0, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L884] int retValue_acc ; [L885] int tmp ; [L889] FCALL select_helpers() [L890] FCALL select_features() [L891] CALL, EXPR valid_product() [L681] int retValue_acc ; [L684] retValue_acc = 1 [L685] return (retValue_acc); VAL [\result=1, cleanupTimeShifts=4, head={0:0}, methAndRunningLastTime=0, methaneLevelCritical=0, pumpRunning=0, retValue_acc=1, systemActive=1, waterLevel=1] [L891] RET, EXPR valid_product() [L891] tmp = valid_product() [L893] COND TRUE \read(tmp) [L895] FCALL setup() [L896] CALL runTest() [L877] CALL __utac_acc__Specification2_spec__1() [L776] methAndRunningLastTime = 0 VAL [cleanupTimeShifts=4, head={0:0}, methAndRunningLastTime=0, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L877] RET __utac_acc__Specification2_spec__1() [L878] CALL test() [L55] int splverifierCounter ; [L56] int tmp ; [L57] int tmp___0 ; [L58] int tmp___1 ; [L59] int tmp___2 ; [L62] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methAndRunningLastTime=0, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] Loop: [L64] COND TRUE 1 [L66] COND TRUE splverifierCounter < 4 [L72] tmp = __VERIFIER_nondet_int() [L74] COND FALSE !(\read(tmp)) [L82] tmp___0 = __VERIFIER_nondet_int() [L84] COND FALSE !(\read(tmp___0)) [L92] tmp___2 = __VERIFIER_nondet_int() [L94] COND TRUE \read(tmp___2) [L107] CALL timeShift() [L143] COND FALSE !(\read(pumpRunning)) [L150] COND TRUE \read(systemActive) [L152] CALL processEnvironment() [L172] int tmp ; [L175] COND FALSE !(\read(pumpRunning)) [L190] FCALL processEnvironment__wrappee__methaneQuery() [L152] RET processEnvironment() [L158] CALL __utac_acc__Specification2_spec__2() [L781] int tmp ; [L782] int tmp___0 ; [L786] CALL, EXPR isMethaneLevelCritical() [L730] int retValue_acc ; [L733] retValue_acc = methaneLevelCritical [L734] return (retValue_acc); [L786] RET, EXPR isMethaneLevelCritical() [L786] tmp = isMethaneLevelCritical() [L788] COND FALSE !(\read(tmp)) [L804] methAndRunningLastTime = 0 [L158] RET __utac_acc__Specification2_spec__2() [L107] RET timeShift() End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2022-11-18 19:36:04,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d02c71a-a7c2-43f6-8631-bead5f2f9aa4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)