./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext.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_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD --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 75539a96800eea0d91d3dad14f0ad356c5f8079fa4f6dcf5bbfcb193296a44a8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD --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 75539a96800eea0d91d3dad14f0ad356c5f8079fa4f6dcf5bbfcb193296a44a8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 22:54:59,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:54:59,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:54:59,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:54:59,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:54:59,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:54:59,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:54:59,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:54:59,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:54:59,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:54:59,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:54:59,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:54:59,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:54:59,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:54:59,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:54:59,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:54:59,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:54:59,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:54:59,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:54:59,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:54:59,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:54:59,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:54:59,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:54:59,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:54:59,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:54:59,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:54:59,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:54:59,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:54:59,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:54:59,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:54:59,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:54:59,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:54:59,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:54:59,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:54:59,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:54:59,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:54:59,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:54:59,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:54:59,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:54:59,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:54:59,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:54:59,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:54:59,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:54:59,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:54:59,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:54:59,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:54:59,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:54:59,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:54:59,302 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:54:59,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:54:59,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:54:59,303 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:54:59,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:54:59,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:54:59,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:54:59,305 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:54:59,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:54:59,305 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:54:59,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:54:59,306 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:54:59,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:54:59,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:54:59,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:54:59,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:54:59,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:54:59,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:54:59,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:54:59,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:54:59,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:54:59,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:54:59,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:54:59,311 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_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75539a96800eea0d91d3dad14f0ad356c5f8079fa4f6dcf5bbfcb193296a44a8 [2021-10-28 22:54:59,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:54:59,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:54:59,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:54:59,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:54:59,734 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:54:59,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-ext-properties/list-ext.i [2021-10-28 22:54:59,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data/f8156a52a/6d8109a95d5840e4a9533ab20dd91b12/FLAG3de630cca [2021-10-28 22:55:00,589 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:55:00,590 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/sv-benchmarks/c/list-ext-properties/list-ext.i [2021-10-28 22:55:00,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data/f8156a52a/6d8109a95d5840e4a9533ab20dd91b12/FLAG3de630cca [2021-10-28 22:55:00,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data/f8156a52a/6d8109a95d5840e4a9533ab20dd91b12 [2021-10-28 22:55:00,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:55:00,849 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:55:00,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:55:00,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:55:00,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:55:00,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:55:00" (1/1) ... [2021-10-28 22:55:00,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42711da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:00, skipping insertion in model container [2021-10-28 22:55:00,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:55:00" (1/1) ... [2021-10-28 22:55:00,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:55:00,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:55:01,337 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_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/sv-benchmarks/c/list-ext-properties/list-ext.i[23551,23564] [2021-10-28 22:55:01,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:55:01,372 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:55:01,442 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_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/sv-benchmarks/c/list-ext-properties/list-ext.i[23551,23564] [2021-10-28 22:55:01,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:55:01,481 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:55:01,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01 WrapperNode [2021-10-28 22:55:01,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:55:01,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:55:01,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:55:01,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:55:01,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (1/1) ... [2021-10-28 22:55:01,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (1/1) ... [2021-10-28 22:55:01,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (1/1) ... [2021-10-28 22:55:01,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (1/1) ... [2021-10-28 22:55:01,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (1/1) ... [2021-10-28 22:55:01,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (1/1) ... [2021-10-28 22:55:01,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (1/1) ... [2021-10-28 22:55:01,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:55:01,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:55:01,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:55:01,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:55:01,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (1/1) ... [2021-10-28 22:55:01,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:55:01,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:01,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:55:01,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:55:01,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:55:01,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:55:01,686 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:55:01,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:55:01,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:55:01,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 22:55:01,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 22:55:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 22:55:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 22:55:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:55:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:55:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:55:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:55:01,699 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:55:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:55:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:55:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:55:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:55:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:55:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:55:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:55:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:55:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:55:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:55:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:55:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:55:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:55:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:55:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:55:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:55:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:55:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 22:55:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 22:55:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 22:55:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:55:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:55:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:55:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:55:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:55:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:55:01,704 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:55:01,704 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:55:01,704 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:55:01,705 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:55:01,705 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:55:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:55:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:55:01,706 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:55:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:55:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:55:01,707 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:55:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:55:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:55:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:55:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:55:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:55:01,708 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:55:01,709 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:55:01,709 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:55:01,709 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:55:01,709 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:55:01,710 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:55:01,711 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:55:01,712 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:55:01,712 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:55:01,713 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:55:01,713 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:55:01,713 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:55:01,714 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:55:01,714 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:55:01,714 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:55:01,714 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:55:01,714 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:55:01,714 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:55:01,714 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:55:01,716 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:55:01,716 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:55:01,716 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:55:01,716 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:55:01,716 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:55:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:55:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:55:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:55:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:55:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:55:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:55:01,717 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:55:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:55:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:55:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:55:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:55:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:55:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:55:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:55:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:55:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:55:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:55:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:55:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:55:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:55:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:55:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:55:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:55:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:55:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:55:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:55:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:55:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:55:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:55:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:55:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:55:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:55:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:55:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:55:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:55:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:55:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:55:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:55:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:55:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 22:55:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:55:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:55:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:55:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:55:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:55:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:55:01,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:55:01,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:55:01,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:55:01,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:55:02,157 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 22:55:02,538 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:55:02,538 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-28 22:55:02,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:02 BoogieIcfgContainer [2021-10-28 22:55:02,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:55:02,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:55:02,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:55:02,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:55:02,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:55:00" (1/3) ... [2021-10-28 22:55:02,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df7ad5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:55:02, skipping insertion in model container [2021-10-28 22:55:02,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:01" (2/3) ... [2021-10-28 22:55:02,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df7ad5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:55:02, skipping insertion in model container [2021-10-28 22:55:02,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:02" (3/3) ... [2021-10-28 22:55:02,552 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext.i [2021-10-28 22:55:02,559 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:55:02,559 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-10-28 22:55:02,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:55:02,642 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 22:55:02,643 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-10-28 22:55:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 92 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:55:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:55:02,680 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:02,681 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:02,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash -234092837, now seen corresponding path program 1 times [2021-10-28 22:55:02,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:02,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237160439] [2021-10-28 22:55:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:02,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:02,949 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 22:55:02,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:02,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237160439] [2021-10-28 22:55:02,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237160439] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:02,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:02,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:55:02,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382623217] [2021-10-28 22:55:02,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 22:55:02,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 22:55:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 22:55:02,992 INFO L87 Difference]: Start difference. First operand has 98 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 92 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 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 2.6666666666666665) internal successors, (8), 2 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 22:55:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:03,277 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-10-28 22:55:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 22:55:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 22:55:03,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:03,289 INFO L225 Difference]: With dead ends: 98 [2021-10-28 22:55:03,289 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 22:55:03,291 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 22:55:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 22:55:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-28 22:55:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 86 states have internal predecessors, (93), 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 22:55:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-10-28 22:55:03,336 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 11 [2021-10-28 22:55:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:03,336 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-10-28 22:55:03,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 22:55:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-10-28 22:55:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:55:03,337 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:03,338 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:03,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:55:03,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:03,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1332069837, now seen corresponding path program 1 times [2021-10-28 22:55:03,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:03,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420534599] [2021-10-28 22:55:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:03,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:03,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:03,477 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 22:55:03,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:03,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420534599] [2021-10-28 22:55:03,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420534599] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:03,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:03,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:55:03,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51129870] [2021-10-28 22:55:03,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:55:03,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:55:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:55:03,482 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 22:55:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:03,831 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-10-28 22:55:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:55:03,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-10-28 22:55:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:03,839 INFO L225 Difference]: With dead ends: 111 [2021-10-28 22:55:03,839 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 22:55:03,840 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 22:55:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 22:55:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-10-28 22:55:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 87 states have internal predecessors, (104), 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 22:55:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2021-10-28 22:55:03,866 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 12 [2021-10-28 22:55:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:03,866 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2021-10-28 22:55:03,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 22:55:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2021-10-28 22:55:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:55:03,868 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:03,868 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:03,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:55:03,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1332069838, now seen corresponding path program 1 times [2021-10-28 22:55:03,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:03,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422290235] [2021-10-28 22:55:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:03,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:04,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:04,109 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 22:55:04,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:04,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422290235] [2021-10-28 22:55:04,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422290235] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:04,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:04,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:55:04,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727572405] [2021-10-28 22:55:04,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:55:04,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:04,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:55:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:55:04,113 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 22:55:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:04,419 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-10-28 22:55:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:55:04,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-10-28 22:55:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:04,421 INFO L225 Difference]: With dead ends: 128 [2021-10-28 22:55:04,421 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 22:55:04,422 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 22:55:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 22:55:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-10-28 22:55:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 107 states have internal predecessors, (122), 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 22:55:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-10-28 22:55:04,432 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 12 [2021-10-28 22:55:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:04,433 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-10-28 22:55:04,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 22:55:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-10-28 22:55:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:55:04,434 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:04,434 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:04,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:55:04,435 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:04,436 INFO L85 PathProgramCache]: Analyzing trace with hash 296118254, now seen corresponding path program 1 times [2021-10-28 22:55:04,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:04,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082780636] [2021-10-28 22:55:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:04,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:04,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:04,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:04,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082780636] [2021-10-28 22:55:04,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082780636] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:04,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:04,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:55:04,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005894036] [2021-10-28 22:55:04,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:55:04,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:04,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:55:04,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:55:04,547 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 22:55:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:05,024 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2021-10-28 22:55:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:55:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-10-28 22:55:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:05,027 INFO L225 Difference]: With dead ends: 156 [2021-10-28 22:55:05,028 INFO L226 Difference]: Without dead ends: 156 [2021-10-28 22:55:05,028 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 22:55:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-28 22:55:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 115. [2021-10-28 22:55:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 86 states have (on average 1.5116279069767442) internal successors, (130), 111 states have internal predecessors, (130), 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 22:55:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2021-10-28 22:55:05,039 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 21 [2021-10-28 22:55:05,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:05,040 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2021-10-28 22:55:05,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 22:55:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2021-10-28 22:55:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:55:05,042 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:05,042 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:05,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:55:05,043 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash 296118255, now seen corresponding path program 1 times [2021-10-28 22:55:05,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:05,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720904332] [2021-10-28 22:55:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:05,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:05,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:05,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:05,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720904332] [2021-10-28 22:55:05,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720904332] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:05,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:05,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:55:05,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519266303] [2021-10-28 22:55:05,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:55:05,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:05,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:55:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:55:05,191 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 22:55:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:05,674 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2021-10-28 22:55:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:55:05,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-10-28 22:55:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:05,676 INFO L225 Difference]: With dead ends: 159 [2021-10-28 22:55:05,677 INFO L226 Difference]: Without dead ends: 159 [2021-10-28 22:55:05,677 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 22:55:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-28 22:55:05,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 99. [2021-10-28 22:55:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.4794520547945205) internal successors, (108), 95 states have internal predecessors, (108), 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 22:55:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-10-28 22:55:05,685 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 21 [2021-10-28 22:55:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:05,685 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-10-28 22:55:05,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 22:55:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-10-28 22:55:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 22:55:05,696 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:05,696 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, 1] [2021-10-28 22:55:05,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 22:55:05,697 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1432577259, now seen corresponding path program 1 times [2021-10-28 22:55:05,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:05,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398638502] [2021-10-28 22:55:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:05,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:05,887 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 22:55:05,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:05,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398638502] [2021-10-28 22:55:05,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398638502] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:05,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:05,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 22:55:05,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101390782] [2021-10-28 22:55:05,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:55:05,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:55:05,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:55:05,891 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22:55:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:06,182 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2021-10-28 22:55:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:55:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22 [2021-10-28 22:55:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:06,185 INFO L225 Difference]: With dead ends: 191 [2021-10-28 22:55:06,185 INFO L226 Difference]: Without dead ends: 191 [2021-10-28 22:55:06,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:06,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-28 22:55:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-10-28 22:55:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 106 states have internal predecessors, (123), 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 22:55:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-10-28 22:55:06,207 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 22 [2021-10-28 22:55:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:06,207 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-10-28 22:55:06,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22:55:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-10-28 22:55:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:55:06,212 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:06,212 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:06,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 22:55:06,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1350239013, now seen corresponding path program 1 times [2021-10-28 22:55:06,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:06,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137929225] [2021-10-28 22:55:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:06,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:06,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:06,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:06,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137929225] [2021-10-28 22:55:06,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137929225] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:06,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:06,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:55:06,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931955674] [2021-10-28 22:55:06,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:55:06,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:55:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:55:06,365 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 22:55:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:06,734 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2021-10-28 22:55:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:55:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 24 [2021-10-28 22:55:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:06,736 INFO L225 Difference]: With dead ends: 138 [2021-10-28 22:55:06,736 INFO L226 Difference]: Without dead ends: 138 [2021-10-28 22:55:06,737 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 22:55:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-28 22:55:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2021-10-28 22:55:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 104 states have internal predecessors, (121), 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 22:55:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-10-28 22:55:06,754 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 24 [2021-10-28 22:55:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:06,755 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-10-28 22:55:06,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 22:55:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-10-28 22:55:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:55:06,759 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:06,760 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:06,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 22:55:06,760 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:06,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1350239012, now seen corresponding path program 1 times [2021-10-28 22:55:06,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:06,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340334851] [2021-10-28 22:55:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:06,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:06,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:06,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340334851] [2021-10-28 22:55:06,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340334851] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:06,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:06,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:55:06,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161450724] [2021-10-28 22:55:06,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:55:06,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:55:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:55:06,881 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 22:55:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:07,335 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2021-10-28 22:55:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:55:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 24 [2021-10-28 22:55:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:07,337 INFO L225 Difference]: With dead ends: 136 [2021-10-28 22:55:07,337 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 22:55:07,337 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 22:55:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 22:55:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-10-28 22:55:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 89 states have internal predecessors, (104), 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 22:55:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-10-28 22:55:07,343 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 24 [2021-10-28 22:55:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:07,343 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-10-28 22:55:07,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 22:55:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-10-28 22:55:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 22:55:07,345 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:07,345 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, 1, 1, 1] [2021-10-28 22:55:07,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 22:55:07,345 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2025386131, now seen corresponding path program 1 times [2021-10-28 22:55:07,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:07,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527966284] [2021-10-28 22:55:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:07,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:55:07,364 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 22:55:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:55:07,418 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 22:55:07,418 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 22:55:07,419 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:55:07,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:55:07,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:55:07,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 22:55:07,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 22:55:07,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 22:55:07,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 22:55:07,424 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 22:55:07,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 22:55:07,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 22:55:07,425 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 22:55:07,426 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 22:55:07,426 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 22:55:07,426 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 22:55:07,427 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 22:55:07,427 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 22:55:07,427 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 22:55:07,427 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 22:55:07,428 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 22:55:07,428 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 22:55:07,428 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 22:55:07,429 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 22:55:07,429 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 22:55:07,429 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 22:55:07,429 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 22:55:07,429 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 22:55:07,430 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 22:55:07,430 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 22:55:07,430 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 22:55:07,430 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 22:55:07,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-28 22:55:07,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:07,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:07,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:07,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:07,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:07,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:07,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:55:07,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 22:55:07,437 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:07,440 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:55:07,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:55:07 BoogieIcfgContainer [2021-10-28 22:55:07,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:55:07,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:55:07,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:55:07,488 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:55:07,488 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:02" (3/4) ... [2021-10-28 22:55:07,492 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 22:55:07,492 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:55:07,495 INFO L168 Benchmark]: Toolchain (without parser) took 6643.60 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.2 MB in the beginning and 61.6 MB in the end (delta: 8.6 MB). Peak memory consumption was 30.6 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:07,495 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 83.9 MB. Free memory was 63.2 MB in the beginning and 63.2 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:55:07,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 630.63 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 74.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:07,502 INFO L168 Benchmark]: Boogie Preprocessor took 88.34 ms. Allocated memory is still 104.9 MB. Free memory was 74.0 MB in the beginning and 71.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:07,502 INFO L168 Benchmark]: RCFGBuilder took 968.92 ms. Allocated memory is still 104.9 MB. Free memory was 71.2 MB in the beginning and 79.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:07,503 INFO L168 Benchmark]: TraceAbstraction took 4943.54 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 79.2 MB in the beginning and 61.6 MB in the end (delta: 17.6 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:07,504 INFO L168 Benchmark]: Witness Printer took 5.27 ms. Allocated memory is still 125.8 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:55:07,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 83.9 MB. Free memory was 63.2 MB in the beginning and 63.2 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 630.63 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 74.0 MB in the end (delta: -4.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 88.34 ms. Allocated memory is still 104.9 MB. Free memory was 74.0 MB in the beginning and 71.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 968.92 ms. Allocated memory is still 104.9 MB. Free memory was 71.2 MB in the beginning and 79.8 MB in the end (delta: -8.6 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4943.54 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 79.2 MB in the beginning and 61.6 MB in the end (delta: 17.6 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.27 ms. Allocated memory is still 125.8 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 568]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 568. Possible FailurePath: [L532] int i = 0; [L533] int y = 0; [L534] List a = (List) malloc(sizeof(struct node)); [L535] COND FALSE !(a == 0) VAL [a={-1:0}, i=0, y=0] [L536] List t; [L537] List p = a; VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L538] i < 10 && __VERIFIER_nondet_int() [L538] i < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, i < 10 && __VERIFIER_nondet_int()=0, p={-1:0}, y=0] [L538] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L546] y < 10 && __VERIFIER_nondet_int() [L546] y < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, p={-1:0}, y=0, y < 10 && __VERIFIER_nondet_int()=0] [L546] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L554] p->h = 3 VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L555] p->n = 0 VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L556] i = 0 [L557] y = 0 [L558] p = a VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L559] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L559] COND FALSE !(p->h == 1) [L563] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L563] COND FALSE !(p->h == 2) [L567] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L567] COND TRUE p->h != 3 || (i + y) < 20 [L568] reach_error() VAL [a={-1:0}, i=0, p={-1:0}, y=0] - 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: 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: 548]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 117 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 578 SDtfs, 865 SDslu, 1008 SDs, 0 SdLazy, 2288 SolverSat, 143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=4, InterpolantAutomatonStates: 56, 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, 292 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 171 NumberOfCodeBlocks, 171 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 700 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 17/17 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 22:55:07,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/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 22:55:10,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:55:10,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:55:10,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:55:10,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:55:10,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:55:10,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:55:10,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:55:10,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:55:10,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:55:10,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:55:10,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:55:10,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:55:10,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:55:10,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:55:10,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:55:10,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:55:10,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:55:10,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:55:10,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:55:10,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:55:10,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:55:10,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:55:10,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:55:10,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:55:10,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:55:10,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:55:10,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:55:10,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:55:10,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:55:10,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:55:10,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:55:10,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:55:10,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:55:10,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:55:10,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:55:10,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:55:10,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:55:10,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:55:10,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:55:10,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:55:10,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 22:55:10,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:55:10,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:55:10,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:55:10,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:55:10,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:55:10,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:55:10,719 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:55:10,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:55:10,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:55:10,721 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:55:10,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:55:10,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:55:10,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:55:10,722 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:55:10,722 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:55:10,722 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:55:10,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:55:10,723 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:55:10,723 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 22:55:10,724 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 22:55:10,726 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:55:10,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:55:10,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:55:10,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:55:10,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:55:10,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:55:10,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:55:10,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:55:10,731 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 22:55:10,731 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 22:55:10,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:55:10,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 22:55:10,732 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_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75539a96800eea0d91d3dad14f0ad356c5f8079fa4f6dcf5bbfcb193296a44a8 [2021-10-28 22:55:11,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:55:11,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:55:11,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:55:11,346 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:55:11,348 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:55:11,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-ext-properties/list-ext.i [2021-10-28 22:55:11,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data/6149a0a1b/eae4ea03a5a24a5596420bf79418dccd/FLAG966742293 [2021-10-28 22:55:12,225 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:55:12,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/sv-benchmarks/c/list-ext-properties/list-ext.i [2021-10-28 22:55:12,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data/6149a0a1b/eae4ea03a5a24a5596420bf79418dccd/FLAG966742293 [2021-10-28 22:55:12,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/data/6149a0a1b/eae4ea03a5a24a5596420bf79418dccd [2021-10-28 22:55:12,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:55:12,496 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:55:12,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:55:12,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:55:12,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:55:12,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:55:12" (1/1) ... [2021-10-28 22:55:12,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6291da46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:12, skipping insertion in model container [2021-10-28 22:55:12,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:55:12" (1/1) ... [2021-10-28 22:55:12,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:55:12,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:55:13,082 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_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/sv-benchmarks/c/list-ext-properties/list-ext.i[23551,23564] [2021-10-28 22:55:13,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:55:13,106 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:55:13,172 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_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/sv-benchmarks/c/list-ext-properties/list-ext.i[23551,23564] [2021-10-28 22:55:13,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:55:13,229 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:55:13,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13 WrapperNode [2021-10-28 22:55:13,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:55:13,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:55:13,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:55:13,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:55:13,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:55:13,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:55:13,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:55:13,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:55:13,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:55:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:13,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:55:13,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:55:13,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:55:13,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:55:13,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 22:55:13,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:55:13,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:55:13,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:55:13,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 22:55:13,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 22:55:13,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 22:55:13,485 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 22:55:13,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:55:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:55:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:55:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:55:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:55:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:55:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:55:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:55:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:55:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:55:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:55:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:55:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:55:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:55:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:55:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:55:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:55:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:55:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:55:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:55:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:55:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:55:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:55:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:55:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:55:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:55:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 22:55:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 22:55:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 22:55:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:55:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:55:13,493 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:55:13,493 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:55:13,494 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:55:13,494 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:55:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:55:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:55:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:55:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:55:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:55:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:55:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:55:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:55:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:55:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:55:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:55:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:55:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:55:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:55:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:55:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:55:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:55:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:55:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:55:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:55:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:55:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:55:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:55:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:55:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:55:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:55:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:55:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:55:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:55:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:55:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:55:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:55:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:55:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:55:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:55:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:55:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:55:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:55:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:55:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:55:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:55:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:55:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:55:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:55:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:55:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:55:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:55:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:55:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:55:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:55:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:55:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:55:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:55:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:55:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:55:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:55:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:55:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:55:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:55:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:55:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:55:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:55:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:55:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:55:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:55:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:55:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:55:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:55:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:55:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:55:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:55:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:55:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:55:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:55:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:55:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:55:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:55:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:55:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:55:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 22:55:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:55:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:55:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 22:55:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:55:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:55:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 22:55:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:55:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:55:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 22:55:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:55:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 22:55:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 22:55:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 22:55:13,894 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 22:55:14,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:55:14,430 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-28 22:55:14,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:14 BoogieIcfgContainer [2021-10-28 22:55:14,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:55:14,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:55:14,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:55:14,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:55:14,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:55:12" (1/3) ... [2021-10-28 22:55:14,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d121a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:55:14, skipping insertion in model container [2021-10-28 22:55:14,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13" (2/3) ... [2021-10-28 22:55:14,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d121a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:55:14, skipping insertion in model container [2021-10-28 22:55:14,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:14" (3/3) ... [2021-10-28 22:55:14,442 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext.i [2021-10-28 22:55:14,448 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:55:14,448 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-10-28 22:55:14,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:55:14,507 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 22:55:14,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-10-28 22:55:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:55:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 22:55:14,536 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:14,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:14,537 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1300184920, now seen corresponding path program 1 times [2021-10-28 22:55:14,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:14,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182657161] [2021-10-28 22:55:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:14,560 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:14,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:14,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:14,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 22:55:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 22:55:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:14,894 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 22:55:14,968 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 22:55:14,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:15,087 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 22:55:15,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:15,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182657161] [2021-10-28 22:55:15,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182657161] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:15,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:15,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 22:55:15,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044907502] [2021-10-28 22:55:15,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:55:15,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:55:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:15,126 INFO L87 Difference]: Start difference. First operand has 94 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 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 22:55:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:15,617 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-10-28 22:55:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:55:15,620 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 22:55:15,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:15,631 INFO L225 Difference]: With dead ends: 111 [2021-10-28 22:55:15,632 INFO L226 Difference]: Without dead ends: 103 [2021-10-28 22:55:15,634 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 22:55:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-28 22:55:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-10-28 22:55:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 79 states have internal predecessors, (92), 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 22:55:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2021-10-28 22:55:15,697 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 10 [2021-10-28 22:55:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:15,698 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2021-10-28 22:55:15,698 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 22:55:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2021-10-28 22:55:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 22:55:15,700 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:15,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:15,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:15,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:15,927 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1300184921, now seen corresponding path program 1 times [2021-10-28 22:55:15,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:15,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192408561] [2021-10-28 22:55:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:15,940 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:15,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:15,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 22:55:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:55:16,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:16,144 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 22:55:16,212 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 22:55:16,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:16,421 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 22:55:16,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:16,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192408561] [2021-10-28 22:55:16,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192408561] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:16,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:16,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-28 22:55:16,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652480766] [2021-10-28 22:55:16,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:55:16,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:16,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:55:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:55:16,426 INFO L87 Difference]: Start difference. First operand 83 states and 95 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 22:55:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:17,214 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2021-10-28 22:55:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:55:17,215 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 22:55:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:17,217 INFO L225 Difference]: With dead ends: 119 [2021-10-28 22:55:17,217 INFO L226 Difference]: Without dead ends: 119 [2021-10-28 22:55:17,218 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 22:55:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-28 22:55:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-10-28 22:55:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 97 states have internal predecessors, (107), 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 22:55:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-10-28 22:55:17,231 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 10 [2021-10-28 22:55:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:17,232 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-10-28 22:55:17,236 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 22:55:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-10-28 22:55:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:55:17,238 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:17,238 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:17,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:17,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:17,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1952159409, now seen corresponding path program 1 times [2021-10-28 22:55:17,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:17,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122527746] [2021-10-28 22:55:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:17,465 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:17,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:17,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 22:55:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:55:17,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:17,720 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 22:55:17,781 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 22:55:17,835 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 22:55:17,876 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 22:55:17,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:17,985 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 22:55:17,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:17,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122527746] [2021-10-28 22:55:17,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122527746] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:17,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:17,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 22:55:17,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635145118] [2021-10-28 22:55:17,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:55:17,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:55:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:55:17,997 INFO L87 Difference]: Start difference. First operand 101 states and 110 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 22:55:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:18,783 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2021-10-28 22:55:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:55:18,784 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 22:55:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:18,786 INFO L225 Difference]: With dead ends: 140 [2021-10-28 22:55:18,786 INFO L226 Difference]: Without dead ends: 140 [2021-10-28 22:55:18,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-28 22:55:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2021-10-28 22:55:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 99 states have internal predecessors, (112), 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 22:55:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-10-28 22:55:18,801 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 17 [2021-10-28 22:55:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:18,801 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-10-28 22:55:18,802 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 22:55:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-10-28 22:55:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:55:18,803 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:18,803 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:18,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:19,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:19,019 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1952159408, now seen corresponding path program 1 times [2021-10-28 22:55:19,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:19,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884089031] [2021-10-28 22:55:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:19,021 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:19,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:19,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:19,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 22:55:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:19,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:55:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:19,251 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 22:55:19,327 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 22:55:19,342 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 22:55:19,404 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 22:55:19,421 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 22:55:19,504 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 22:55:19,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:19,941 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 22:55:19,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:19,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884089031] [2021-10-28 22:55:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884089031] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:19,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:19,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-28 22:55:19,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591495197] [2021-10-28 22:55:19,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:55:19,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:55:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:55:19,947 INFO L87 Difference]: Start difference. First operand 103 states and 115 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 22:55:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:21,812 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2021-10-28 22:55:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:55:21,813 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 22:55:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:21,814 INFO L225 Difference]: With dead ends: 145 [2021-10-28 22:55:21,814 INFO L226 Difference]: Without dead ends: 145 [2021-10-28 22:55:21,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:55:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-28 22:55:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2021-10-28 22:55:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 87 states have internal predecessors, (96), 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 22:55:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-10-28 22:55:21,837 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 17 [2021-10-28 22:55:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:21,837 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-10-28 22:55:21,838 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 22:55:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-10-28 22:55:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 22:55:21,839 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:21,839 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:21,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-28 22:55:22,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:22,047 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:22,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2002045966, now seen corresponding path program 1 times [2021-10-28 22:55:22,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:22,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596115221] [2021-10-28 22:55:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:22,050 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:22,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:22,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 22:55:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:22,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:55:22,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:22,323 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 22:55:22,375 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 22:55:22,375 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 22:55:22,412 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 22:55:22,433 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 22:55:22,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:22,590 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 148 treesize of output 140 [2021-10-28 22:55:22,718 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 22:55:22,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:22,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596115221] [2021-10-28 22:55:22,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596115221] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:22,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:22,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-10-28 22:55:22,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690161132] [2021-10-28 22:55:22,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:55:22,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:55:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:55:22,723 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 22:55:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:23,675 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2021-10-28 22:55:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:55:23,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 18 [2021-10-28 22:55:23,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:23,678 INFO L225 Difference]: With dead ends: 192 [2021-10-28 22:55:23,678 INFO L226 Difference]: Without dead ends: 192 [2021-10-28 22:55:23,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:55:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-28 22:55:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 98. [2021-10-28 22:55:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 94 states have internal predecessors, (105), 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 22:55:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-10-28 22:55:23,689 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 18 [2021-10-28 22:55:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:23,689 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-10-28 22:55:23,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 22:55:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-10-28 22:55:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 22:55:23,691 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:23,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:23,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-28 22:55:23,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:23,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:23,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1259494057, now seen corresponding path program 1 times [2021-10-28 22:55:23,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:23,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146419398] [2021-10-28 22:55:23,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:23,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:23,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:23,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:23,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 22:55:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:24,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:55:24,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:24,134 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 22:55:24,170 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 22:55:24,182 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 13 treesize of output 9 [2021-10-28 22:55:24,231 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 22:55:24,240 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 22:55:24,309 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 22:55:24,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:24,703 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 22:55:24,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:24,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146419398] [2021-10-28 22:55:24,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146419398] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:24,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:24,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-28 22:55:24,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437658270] [2021-10-28 22:55:24,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:55:24,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:55:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:55:24,706 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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 22:55:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:26,469 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-10-28 22:55:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:55:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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 18 [2021-10-28 22:55:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:26,471 INFO L225 Difference]: With dead ends: 124 [2021-10-28 22:55:26,471 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 22:55:26,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:55:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 22:55:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2021-10-28 22:55:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 84 states have internal predecessors, (95), 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 22:55:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-10-28 22:55:26,481 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 18 [2021-10-28 22:55:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:26,481 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-10-28 22:55:26,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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 22:55:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-10-28 22:55:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 22:55:26,483 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:26,483 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:26,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:26,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:26,697 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:26,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1259494058, now seen corresponding path program 1 times [2021-10-28 22:55:26,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:26,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300103504] [2021-10-28 22:55:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:26,699 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:26,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:26,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 22:55:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:55:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:26,973 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 22:55:26,994 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 22:55:27,019 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 22:55:27,053 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 22:55:27,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:27,140 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 22:55:27,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:27,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300103504] [2021-10-28 22:55:27,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300103504] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:27,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:27,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 22:55:27,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586515309] [2021-10-28 22:55:27,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:55:27,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:55:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:55:27,143 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 22:55:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:27,701 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2021-10-28 22:55:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:55:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 18 [2021-10-28 22:55:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:27,703 INFO L225 Difference]: With dead ends: 113 [2021-10-28 22:55:27,703 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 22:55:27,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 22:55:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2021-10-28 22:55:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 79 states have internal predecessors, (89), 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 22:55:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-10-28 22:55:27,711 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 18 [2021-10-28 22:55:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:27,711 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-10-28 22:55:27,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 22:55:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-10-28 22:55:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 22:55:27,713 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:27,713 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 22:55:27,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:27,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:27,927 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-10-28 22:55:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:27,928 INFO L85 PathProgramCache]: Analyzing trace with hash 131545524, now seen corresponding path program 1 times [2021-10-28 22:55:27,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:27,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272096370] [2021-10-28 22:55:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:27,929 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:27,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:27,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:27,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 22:55:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:55:28,128 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 22:55:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:55:28,209 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 22:55:28,209 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 22:55:28,210 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:55:28,212 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:55:28,213 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:55:28,213 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 22:55:28,213 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 22:55:28,213 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 22:55:28,214 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 22:55:28,214 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 22:55:28,214 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 22:55:28,214 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 22:55:28,214 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 22:55:28,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 22:55:28,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 22:55:28,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 22:55:28,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 22:55:28,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 22:55:28,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 22:55:28,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 22:55:28,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 22:55:28,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 22:55:28,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 22:55:28,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 22:55:28,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 22:55:28,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 22:55:28,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 22:55:28,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 22:55:28,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 22:55:28,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 22:55:28,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 22:55:28,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 22:55:28,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-28 22:55:28,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:28,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:28,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:28,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:28,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:28,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:28,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:55:28,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:28,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:28,435 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:28,439 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:55:28,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:55:28 BoogieIcfgContainer [2021-10-28 22:55:28,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:55:28,485 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:55:28,485 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:55:28,486 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:55:28,486 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:14" (3/4) ... [2021-10-28 22:55:28,494 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 22:55:28,494 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:55:28,496 INFO L168 Benchmark]: Toolchain (without parser) took 15999.52 ms. Allocated memory was 56.6 MB in the beginning and 117.4 MB in the end (delta: 60.8 MB). Free memory was 33.2 MB in the beginning and 62.9 MB in the end (delta: -29.7 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:28,496 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory is still 37.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:55:28,501 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.64 ms. Allocated memory was 56.6 MB in the beginning and 90.2 MB in the end (delta: 33.6 MB). Free memory was 33.0 MB in the beginning and 65.7 MB in the end (delta: -32.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:28,502 INFO L168 Benchmark]: Boogie Preprocessor took 137.27 ms. Allocated memory is still 90.2 MB. Free memory was 65.7 MB in the beginning and 62.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:28,502 INFO L168 Benchmark]: RCFGBuilder took 1061.64 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 57.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:28,503 INFO L168 Benchmark]: TraceAbstraction took 14049.62 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 56.5 MB in the beginning and 62.9 MB in the end (delta: -6.4 MB). Peak memory consumption was 20.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:28,504 INFO L168 Benchmark]: Witness Printer took 9.14 ms. Allocated memory is still 117.4 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:55:28,507 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory is still 37.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 732.64 ms. Allocated memory was 56.6 MB in the beginning and 90.2 MB in the end (delta: 33.6 MB). Free memory was 33.0 MB in the beginning and 65.7 MB in the end (delta: -32.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 137.27 ms. Allocated memory is still 90.2 MB. Free memory was 65.7 MB in the beginning and 62.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1061.64 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 57.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14049.62 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 56.5 MB in the beginning and 62.9 MB in the end (delta: -6.4 MB). Peak memory consumption was 20.2 MB. Max. memory is 16.1 GB. * Witness Printer took 9.14 ms. Allocated memory is still 117.4 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 568]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 568. Possible FailurePath: [L532] int i = 0; [L533] int y = 0; [L534] List a = (List) malloc(sizeof(struct node)); [L535] COND FALSE !(a == 0) VAL [a={1:0}, i=0, y=0] [L536] List t; [L537] List p = a; VAL [a={1:0}, i=0, p={1:0}, y=0] [L538] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L546] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L554] p->h = 3 VAL [a={1:0}, i=0, p={1:0}, y=0] [L555] p->n = 0 VAL [a={1:0}, i=0, p={1:0}, y=0] [L556] i = 0 [L557] y = 0 [L558] p = a VAL [a={1:0}, i=0, p={1:0}, y=0] [L559] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L559] COND FALSE !(p->h == 1) [L563] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L563] COND FALSE !(p->h == 2) [L567] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L567] COND TRUE p->h != 3 || (i + y) < 20 [L568] reach_error() VAL [a={1:0}, i=0, p={1:0}, y=0] - 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: 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: 548]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 119 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 13.9s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 406 SDtfs, 1052 SDslu, 1045 SDs, 0 SdLazy, 1679 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=3, InterpolantAutomatonStates: 56, 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, 7 MinimizatonAttempts, 289 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 202 ConstructedInterpolants, 1 QuantifiedInterpolants, 1010 SizeOfPredicates, 31 NumberOfNonLiveVariables, 613 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 14/14 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 22:55:28,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e21ed2e7-6acd-43d2-95f0-782b5cb5aea0/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...