./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/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_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/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_40b56627-915e-46b4-860f-b48639e3e765/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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/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_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/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_40b56627-915e-46b4-860f-b48639e3e765/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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:52:52,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:52:52,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:52:52,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:52:52,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:52:52,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:52:52,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:52:52,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:52:52,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:52:52,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:52:52,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:52:52,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:52:52,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:52:52,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:52:52,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:52:52,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:52:52,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:52:52,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:52:52,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:52:52,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:52:52,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:52:52,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:52:52,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:52:52,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:52:52,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:52:52,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:52:52,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:52:52,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:52:52,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:52:52,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:52:52,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:52:52,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:52:52,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:52:52,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:52:52,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:52:52,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:52:52,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:52:52,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:52:52,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:52:52,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:52:52,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:52:52,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:52:52,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:52:52,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:52:52,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:52:52,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:52:52,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:52:52,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:52:52,261 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:52:52,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:52:52,262 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:52:52,262 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:52:52,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:52:52,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:52:52,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:52:52,263 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:52:52,263 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:52:52,264 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:52:52,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:52:52,264 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:52:52,264 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:52:52,264 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:52:52,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:52:52,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:52:52,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:52:52,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:52:52,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:52:52,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:52:52,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:52:52,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:52:52,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:52:52,267 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_40b56627-915e-46b4-860f-b48639e3e765/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-10-28 22:52:52,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:52:52,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:52:52,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:52:52,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:52:52,663 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:52:52,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-properties/simple-2.i [2021-10-28 22:52:52,759 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data/7f914b863/d496000582bb4eb0af80edd6043e4401/FLAGb12069d23 [2021-10-28 22:52:53,411 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:52:53,412 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/sv-benchmarks/c/list-properties/simple-2.i [2021-10-28 22:52:53,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data/7f914b863/d496000582bb4eb0af80edd6043e4401/FLAGb12069d23 [2021-10-28 22:52:53,632 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data/7f914b863/d496000582bb4eb0af80edd6043e4401 [2021-10-28 22:52:53,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:52:53,644 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:52:53,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:52:53,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:52:53,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:52:53,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:52:53" (1/1) ... [2021-10-28 22:52:53,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2fbaa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:53, skipping insertion in model container [2021-10-28 22:52:53,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:52:53" (1/1) ... [2021-10-28 22:52:53,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:52:53,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:52:54,173 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_40b56627-915e-46b4-860f-b48639e3e765/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-28 22:52:54,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:52:54,192 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:52:54,249 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_40b56627-915e-46b4-860f-b48639e3e765/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-28 22:52:54,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:52:54,294 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:52:54,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54 WrapperNode [2021-10-28 22:52:54,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:52:54,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:52:54,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:52:54,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:52:54,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (1/1) ... [2021-10-28 22:52:54,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (1/1) ... [2021-10-28 22:52:54,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (1/1) ... [2021-10-28 22:52:54,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (1/1) ... [2021-10-28 22:52:54,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (1/1) ... [2021-10-28 22:52:54,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (1/1) ... [2021-10-28 22:52:54,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (1/1) ... [2021-10-28 22:52:54,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:52:54,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:52:54,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:52:54,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:52:54,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (1/1) ... [2021-10-28 22:52:54,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:52:54,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:52:54,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:52:54,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:52:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:52:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:52:54,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:52:54,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:52:54,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:52:54,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 22:52:54,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 22:52:54,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 22:52:54,520 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 22:52:54,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:52:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:52:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:52:54,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:52:54,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:52:54,521 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:52:54,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:52:54,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:52:54,521 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:52:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:52:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:52:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:52:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:52:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:52:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:52:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:52:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:52:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:52:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:52:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:52:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:52:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:52:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:52:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:52:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:52:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:52:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 22:52:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 22:52:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 22:52:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:52:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:52:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:52:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:52:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:52:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:52:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:52:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:52:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:52:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:52:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:52:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:52:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:52:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:52:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:52:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:52:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:52:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:52:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:52:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:52:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:52:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:52:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:52:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:52:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:52:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:52:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:52:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:52:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:52:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:52:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:52:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:52:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:52:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:52:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:52:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:52:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:52:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:52:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:52:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:52:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:52:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:52:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:52:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:52:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:52:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:52:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:52:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:52:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:52:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:52:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:52:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:52:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:52:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:52:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:52:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:52:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:52:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:52:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:52:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:52:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:52:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:52:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:52:54,538 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:52:54,538 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:52:54,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:52:54,538 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:52:54,538 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:52:54,539 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:52:54,539 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:52:54,539 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:52:54,539 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:52:54,539 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:52:54,539 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:52:54,540 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:52:54,540 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:52:54,540 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:52:54,540 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:52:54,540 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:52:54,541 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:52:54,541 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:52:54,541 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:52:54,541 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:52:54,541 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:52:54,542 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:52:54,542 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 22:52:54,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:52:54,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:52:54,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:52:54,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:52:54,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:52:54,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:52:54,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:52:54,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:52:54,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:52:54,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:52:54,849 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 22:52:55,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:52:55,123 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 22:52:55,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:52:55 BoogieIcfgContainer [2021-10-28 22:52:55,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:52:55,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:52:55,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:52:55,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:52:55,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:52:53" (1/3) ... [2021-10-28 22:52:55,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399c620a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:52:55, skipping insertion in model container [2021-10-28 22:52:55,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:52:54" (2/3) ... [2021-10-28 22:52:55,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399c620a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:52:55, skipping insertion in model container [2021-10-28 22:52:55,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:52:55" (3/3) ... [2021-10-28 22:52:55,136 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-10-28 22:52:55,143 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:52:55,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-28 22:52:55,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:52:55,225 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 22:52:55,226 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-10-28 22:52:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:52:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 22:52:55,263 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:55,264 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:55,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:55,271 INFO L85 PathProgramCache]: Analyzing trace with hash 875395723, now seen corresponding path program 1 times [2021-10-28 22:52:55,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:55,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858859752] [2021-10-28 22:52:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:55,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:55,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:52:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:55,651 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 22:52:55,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:55,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858859752] [2021-10-28 22:52:55,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858859752] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:55,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:55,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:52:55,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438831030] [2021-10-28 22:52:55,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 22:52:55,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 22:52:55,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 22:52:55,702 INFO L87 Difference]: Start difference. First operand has 50 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:55,875 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-10-28 22:52:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 22:52:55,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 22:52:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:55,886 INFO L225 Difference]: With dead ends: 50 [2021-10-28 22:52:55,886 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 22:52:55,888 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 22:52:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 22:52:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-28 22:52:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-10-28 22:52:55,962 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 10 [2021-10-28 22:52:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:55,963 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-10-28 22:52:55,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-10-28 22:52:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:52:55,965 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:55,965 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:55,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:52:55,965 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1367438898, now seen corresponding path program 1 times [2021-10-28 22:52:55,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:55,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834807114] [2021-10-28 22:52:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:55,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:56,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:52:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:56,137 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 22:52:56,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:56,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834807114] [2021-10-28 22:52:56,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834807114] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:56,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:56,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:52:56,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378365260] [2021-10-28 22:52:56,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:52:56,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:56,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:52:56,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:52:56,142 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:56,280 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-10-28 22:52:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:52:56,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:52:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:56,282 INFO L225 Difference]: With dead ends: 51 [2021-10-28 22:52:56,282 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 22:52:56,283 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 22:52:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 22:52:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-10-28 22:52:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.6) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-10-28 22:52:56,291 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 11 [2021-10-28 22:52:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:56,292 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-10-28 22:52:56,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-10-28 22:52:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:52:56,293 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:56,294 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:56,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:52:56,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1367438899, now seen corresponding path program 1 times [2021-10-28 22:52:56,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:56,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363801649] [2021-10-28 22:52:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:56,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:52:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:56,411 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 22:52:56,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:56,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363801649] [2021-10-28 22:52:56,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363801649] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:56,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:56,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:52:56,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748852314] [2021-10-28 22:52:56,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:52:56,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:56,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:52:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:52:56,415 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:56,559 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-10-28 22:52:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:52:56,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:52:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:56,562 INFO L225 Difference]: With dead ends: 60 [2021-10-28 22:52:56,562 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 22:52:56,562 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 22:52:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 22:52:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2021-10-28 22:52:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 48 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-10-28 22:52:56,570 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2021-10-28 22:52:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:56,571 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-10-28 22:52:56,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-10-28 22:52:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 22:52:56,572 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:56,573 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:56,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:52:56,573 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash 707569559, now seen corresponding path program 1 times [2021-10-28 22:52:56,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:56,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530562052] [2021-10-28 22:52:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:56,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:56,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:52:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:56,663 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 22:52:56,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530562052] [2021-10-28 22:52:56,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530562052] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:56,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:56,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:52:56,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441099252] [2021-10-28 22:52:56,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:52:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:52:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:52:56,667 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:56,801 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-10-28 22:52:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:52:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 22:52:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:56,806 INFO L225 Difference]: With dead ends: 57 [2021-10-28 22:52:56,806 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 22:52:56,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:52:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 22:52:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-10-28 22:52:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-10-28 22:52:56,830 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 16 [2021-10-28 22:52:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:56,830 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-10-28 22:52:56,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-10-28 22:52:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:52:56,832 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:56,832 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:56,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:52:56,833 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 459860759, now seen corresponding path program 1 times [2021-10-28 22:52:56,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:56,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364091337] [2021-10-28 22:52:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:56,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:57,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:52:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:57,027 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 22:52:57,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:57,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364091337] [2021-10-28 22:52:57,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364091337] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:57,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:57,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 22:52:57,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667529590] [2021-10-28 22:52:57,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:52:57,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:52:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:52:57,031 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:57,292 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-10-28 22:52:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:52:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 22:52:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:57,299 INFO L225 Difference]: With dead ends: 89 [2021-10-28 22:52:57,299 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 22:52:57,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:52:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 22:52:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2021-10-28 22:52:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 52 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-10-28 22:52:57,315 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 17 [2021-10-28 22:52:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:57,315 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-10-28 22:52:57,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-10-28 22:52:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:52:57,317 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:57,317 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:57,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 22:52:57,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash 976099109, now seen corresponding path program 1 times [2021-10-28 22:52:57,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:57,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931120785] [2021-10-28 22:52:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:57,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:57,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:52:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:57,491 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 22:52:57,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:57,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931120785] [2021-10-28 22:52:57,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931120785] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:57,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:57,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:52:57,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861769290] [2021-10-28 22:52:57,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:52:57,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:52:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:52:57,495 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:57,744 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-10-28 22:52:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:52:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 22:52:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:57,746 INFO L225 Difference]: With dead ends: 68 [2021-10-28 22:52:57,746 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 22:52:57,747 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 22:52:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 22:52:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2021-10-28 22:52:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-10-28 22:52:57,755 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 19 [2021-10-28 22:52:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:57,756 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-10-28 22:52:57,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-10-28 22:52:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:52:57,758 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:57,758 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:57,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 22:52:57,759 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash 976099110, now seen corresponding path program 1 times [2021-10-28 22:52:57,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:57,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899108211] [2021-10-28 22:52:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:57,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:57,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:52:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:57,947 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 22:52:57,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:57,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899108211] [2021-10-28 22:52:57,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899108211] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:52:57,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:52:57,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:52:57,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341472701] [2021-10-28 22:52:57,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:52:57,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:57,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:52:57,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:52:57,950 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:58,256 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-10-28 22:52:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:52:58,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 22:52:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:58,257 INFO L225 Difference]: With dead ends: 64 [2021-10-28 22:52:58,258 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 22:52:58,258 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 22:52:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 22:52:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2021-10-28 22:52:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-10-28 22:52:58,263 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 19 [2021-10-28 22:52:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-10-28 22:52:58,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-10-28 22:52:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 22:52:58,265 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:58,265 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:58,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 22:52:58,265 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1228946458, now seen corresponding path program 1 times [2021-10-28 22:52:58,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:58,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334008296] [2021-10-28 22:52:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:58,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:58,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:52:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:58,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:52:58,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334008296] [2021-10-28 22:52:58,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334008296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:52:58,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417607780] [2021-10-28 22:52:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:58,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:58,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:52:58,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:52:58,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:52:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:52:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 22:52:58,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:52:58,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 22:52:58,973 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 22:52:59,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-28 22:52:59,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-28 22:52:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:52:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417607780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:52:59,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:52:59,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-10-28 22:52:59,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259715983] [2021-10-28 22:52:59,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:52:59,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:59,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:52:59,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:52:59,196 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:59,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:52:59,461 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-10-28 22:52:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:52:59,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 22:52:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:52:59,463 INFO L225 Difference]: With dead ends: 59 [2021-10-28 22:52:59,463 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 22:52:59,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:52:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 22:52:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-10-28 22:52:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.205128205128205) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-10-28 22:52:59,469 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 20 [2021-10-28 22:52:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:52:59,469 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-10-28 22:52:59,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:52:59,470 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-10-28 22:52:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:52:59,471 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:52:59,477 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:59,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:52:59,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:52:59,691 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:52:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:52:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash 557364199, now seen corresponding path program 1 times [2021-10-28 22:52:59,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:52:59,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603498883] [2021-10-28 22:52:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:52:59,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:52:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:52:59,722 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 22:52:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:52:59,804 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 22:52:59,805 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 22:52:59,807 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr15ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:52:59,813 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:52:59,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:52:59,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 22:52:59,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 22:52:59,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 22:52:59,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 22:52:59,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 22:52:59,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 22:52:59,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 22:52:59,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 22:52:59,823 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 22:52:59,823 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 22:52:59,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:52:59,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 22:52:59,824 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 22:52:59,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 22:52:59,829 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:52:59,833 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:52:59,856 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 22:52:59,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:52:59 BoogieIcfgContainer [2021-10-28 22:52:59,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:52:59,883 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:52:59,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:52:59,884 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:52:59,884 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:52:55" (3/4) ... [2021-10-28 22:52:59,889 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 22:52:59,889 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:52:59,890 INFO L168 Benchmark]: Toolchain (without parser) took 6245.27 ms. Allocated memory was 90.2 MB in the beginning and 144.7 MB in the end (delta: 54.5 MB). Free memory was 54.3 MB in the beginning and 113.5 MB in the end (delta: -59.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:52:59,891 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 90.2 MB. Free memory was 59.8 MB in the beginning and 59.8 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:52:59,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.86 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 54.1 MB in the beginning and 84.9 MB in the end (delta: -30.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:59,892 INFO L168 Benchmark]: Boogie Preprocessor took 127.12 ms. Allocated memory is still 115.3 MB. Free memory was 84.9 MB in the beginning and 82.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:59,895 INFO L168 Benchmark]: RCFGBuilder took 701.36 ms. Allocated memory is still 115.3 MB. Free memory was 82.2 MB in the beginning and 61.1 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:59,896 INFO L168 Benchmark]: TraceAbstraction took 4755.15 ms. Allocated memory was 115.3 MB in the beginning and 144.7 MB in the end (delta: 29.4 MB). Free memory was 61.1 MB in the beginning and 114.6 MB in the end (delta: -53.4 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. [2021-10-28 22:52:59,896 INFO L168 Benchmark]: Witness Printer took 5.63 ms. Allocated memory is still 144.7 MB. Free memory was 114.6 MB in the beginning and 113.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:52:59,900 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 90.2 MB. Free memory was 59.8 MB in the beginning and 59.8 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 645.86 ms. Allocated memory was 90.2 MB in the beginning and 115.3 MB in the end (delta: 25.2 MB). Free memory was 54.1 MB in the beginning and 84.9 MB in the end (delta: -30.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 127.12 ms. Allocated memory is still 115.3 MB. Free memory was 84.9 MB in the beginning and 82.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 701.36 ms. Allocated memory is still 115.3 MB. Free memory was 82.2 MB in the beginning and 61.1 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4755.15 ms. Allocated memory was 115.3 MB in the beginning and 144.7 MB in the end (delta: 29.4 MB). Free memory was 61.1 MB in the beginning and 114.6 MB in the end (delta: -53.4 MB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. * Witness Printer took 5.63 ms. Allocated memory is still 144.7 MB. Free memory was 114.6 MB in the beginning and 113.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={-1:0}, p={-1:0}] [L544] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L545] p = a VAL [a={-1:0}, p={-1:0}] [L546] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L547] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 69 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 4.6s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 233 SDtfs, 410 SDslu, 407 SDs, 0 SdLazy, 902 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=5, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 861 SizeOfPredicates, 8 NumberOfNonLiveVariables, 125 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 22:52:59,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/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 22:53:02,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:53:02,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:53:02,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:53:02,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:53:02,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:53:02,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:53:02,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:53:02,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:53:02,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:53:02,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:53:02,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:53:02,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:53:03,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:53:03,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:53:03,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:53:03,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:53:03,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:53:03,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:53:03,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:53:03,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:53:03,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:53:03,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:53:03,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:53:03,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:53:03,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:53:03,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:53:03,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:53:03,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:53:03,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:53:03,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:53:03,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:53:03,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:53:03,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:53:03,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:53:03,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:53:03,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:53:03,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:53:03,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:53:03,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:53:03,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:53:03,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 22:53:03,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:53:03,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:53:03,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:53:03,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:53:03,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:53:03,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:53:03,118 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:53:03,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:53:03,118 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:53:03,119 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:53:03,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:53:03,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:53:03,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:53:03,120 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:53:03,120 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:53:03,120 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:53:03,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:53:03,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:53:03,121 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 22:53:03,121 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 22:53:03,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:53:03,122 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:53:03,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:53:03,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:53:03,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:53:03,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:53:03,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:53:03,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:53:03,124 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 22:53:03,124 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 22:53:03,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:53:03,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 22:53:03,125 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_40b56627-915e-46b4-860f-b48639e3e765/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-10-28 22:53:03,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:53:03,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:53:03,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:53:03,677 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:53:03,678 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:53:03,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-properties/simple-2.i [2021-10-28 22:53:03,761 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data/743cbeb01/4c86cf02ddf7402caa73e6eb7f98d25d/FLAG3cf2ee74f [2021-10-28 22:53:04,479 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:53:04,480 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/sv-benchmarks/c/list-properties/simple-2.i [2021-10-28 22:53:04,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data/743cbeb01/4c86cf02ddf7402caa73e6eb7f98d25d/FLAG3cf2ee74f [2021-10-28 22:53:04,699 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/data/743cbeb01/4c86cf02ddf7402caa73e6eb7f98d25d [2021-10-28 22:53:04,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:53:04,704 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:53:04,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:53:04,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:53:04,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:53:04,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:53:04" (1/1) ... [2021-10-28 22:53:04,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182aafa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:04, skipping insertion in model container [2021-10-28 22:53:04,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:53:04" (1/1) ... [2021-10-28 22:53:04,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:53:04,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:53:05,221 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_40b56627-915e-46b4-860f-b48639e3e765/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-28 22:53:05,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:53:05,248 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:53:05,312 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-28 22:53:05,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:53:05,366 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:53:05,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05 WrapperNode [2021-10-28 22:53:05,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:53:05,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:53:05,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:53:05,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:53:05,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (1/1) ... [2021-10-28 22:53:05,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (1/1) ... [2021-10-28 22:53:05,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (1/1) ... [2021-10-28 22:53:05,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (1/1) ... [2021-10-28 22:53:05,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (1/1) ... [2021-10-28 22:53:05,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (1/1) ... [2021-10-28 22:53:05,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (1/1) ... [2021-10-28 22:53:05,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:53:05,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:53:05,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:53:05,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:53:05,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (1/1) ... [2021-10-28 22:53:05,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:53:05,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:05,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:53:05,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:53:05,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:53:05,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:53:05,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 22:53:05,633 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:53:05,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:53:05,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:53:05,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 22:53:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 22:53:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 22:53:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 22:53:05,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:53:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:53:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:53:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:53:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:53:05,638 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:53:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:53:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:53:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:53:05,639 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:53:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:53:05,640 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:53:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:53:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:53:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:53:05,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:53:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:53:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:53:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:53:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:53:05,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:53:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:53:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:53:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:53:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:53:05,643 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:53:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 22:53:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 22:53:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 22:53:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:53:05,644 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:53:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:53:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:53:05,645 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:53:05,646 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:53:05,646 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:53:05,647 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:53:05,647 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:53:05,647 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:53:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:53:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:53:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:53:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:53:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:53:05,648 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:53:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:53:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:53:05,649 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:53:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:53:05,650 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:53:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:53:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:53:05,651 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:53:05,653 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:53:05,653 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:53:05,654 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:53:05,654 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:53:05,654 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:53:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:53:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:53:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:53:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:53:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:53:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:53:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:53:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:53:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:53:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:53:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:53:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:53:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:53:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:53:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:53:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:53:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:53:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:53:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:53:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:53:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:53:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:53:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:53:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:53:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:53:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:53:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:53:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:53:05,661 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:53:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:53:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:53:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:53:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:53:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:53:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:53:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:53:05,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:53:05,664 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:53:05,664 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:53:05,664 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:53:05,664 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:53:05,664 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:53:05,664 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:53:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:53:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:53:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:53:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:53:05,665 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:53:05,666 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:53:05,666 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:53:05,666 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:53:05,666 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:53:05,667 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:53:05,667 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:53:05,667 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:53:05,668 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:53:05,669 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 22:53:05,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:53:05,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:53:05,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 22:53:05,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:53:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:53:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 22:53:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:53:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 22:53:05,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:53:05,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 22:53:05,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 22:53:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 22:53:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:53:06,192 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 22:53:06,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:53:06,611 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 22:53:06,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:53:06 BoogieIcfgContainer [2021-10-28 22:53:06,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:53:06,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:53:06,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:53:06,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:53:06,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:53:04" (1/3) ... [2021-10-28 22:53:06,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774dce40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:53:06, skipping insertion in model container [2021-10-28 22:53:06,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:53:05" (2/3) ... [2021-10-28 22:53:06,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774dce40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:53:06, skipping insertion in model container [2021-10-28 22:53:06,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:53:06" (3/3) ... [2021-10-28 22:53:06,630 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-10-28 22:53:06,637 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:53:06,637 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-28 22:53:06,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:53:06,724 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 22:53:06,724 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-10-28 22:53:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:53:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 22:53:06,770 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:06,771 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:06,772 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:53:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1701322882, now seen corresponding path program 1 times [2021-10-28 22:53:06,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:53:06,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184567349] [2021-10-28 22:53:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:06,794 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:53:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:53:06,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:53:06,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 22:53:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 22:53:07,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:07,149 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 22:53:07,216 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 22:53:07,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:53:07,327 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 22:53:07,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:53:07,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184567349] [2021-10-28 22:53:07,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184567349] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:07,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:07,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 22:53:07,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277485309] [2021-10-28 22:53:07,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:53:07,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:53:07,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:53:07,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:53:07,364 INFO L87 Difference]: Start difference. First operand has 49 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:07,658 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-10-28 22:53:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:53:07,661 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 22:53:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:07,670 INFO L225 Difference]: With dead ends: 57 [2021-10-28 22:53:07,670 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 22:53:07,672 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 22:53:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 22:53:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-10-28 22:53:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-10-28 22:53:07,717 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 10 [2021-10-28 22:53:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:07,718 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-10-28 22:53:07,719 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 22:53:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-10-28 22:53:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 22:53:07,720 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:07,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:07,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:07,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:53:07,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:53:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1701322883, now seen corresponding path program 1 times [2021-10-28 22:53:07,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:53:07,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261850315] [2021-10-28 22:53:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:07,937 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:53:07,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:53:07,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:53:07,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 22:53:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:08,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:53:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:08,174 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 22:53:08,287 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 22:53:08,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:53:08,520 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 22:53:08,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:53:08,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261850315] [2021-10-28 22:53:08,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261850315] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:08,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:08,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-28 22:53:08,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275511202] [2021-10-28 22:53:08,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:53:08,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:53:08,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:53:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:53:08,526 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:09,017 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-10-28 22:53:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:53:09,019 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 22:53:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:09,020 INFO L225 Difference]: With dead ends: 58 [2021-10-28 22:53:09,020 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 22:53:09,021 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 22:53:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 22:53:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2021-10-28 22:53:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.457142857142857) internal successors, (51), 46 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-10-28 22:53:09,046 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 10 [2021-10-28 22:53:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:09,047 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-10-28 22:53:09,048 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 22:53:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-10-28 22:53:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:53:09,049 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:09,049 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:09,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:09,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:53:09,269 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:53:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:09,270 INFO L85 PathProgramCache]: Analyzing trace with hash 932559388, now seen corresponding path program 1 times [2021-10-28 22:53:09,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:53:09,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95537802] [2021-10-28 22:53:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:09,271 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:53:09,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:53:09,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:53:09,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 22:53:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:09,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 22:53:09,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:09,522 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 22:53:09,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:53:09,613 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 22:53:09,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:53:09,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95537802] [2021-10-28 22:53:09,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95537802] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:09,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:09,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 22:53:09,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556840237] [2021-10-28 22:53:09,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:53:09,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:53:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:53:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:53:09,618 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:09,803 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-10-28 22:53:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:53:09,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 22:53:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:09,806 INFO L225 Difference]: With dead ends: 55 [2021-10-28 22:53:09,806 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 22:53:09,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:53:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 22:53:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2021-10-28 22:53:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-10-28 22:53:09,815 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 15 [2021-10-28 22:53:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:09,816 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-10-28 22:53:09,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-10-28 22:53:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 22:53:09,818 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:09,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:09,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:10,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:53:10,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:53:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1155389113, now seen corresponding path program 1 times [2021-10-28 22:53:10,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:53:10,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24083611] [2021-10-28 22:53:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:10,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:53:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:53:10,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:53:10,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 22:53:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:53:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:10,350 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 22:53:10,429 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 22:53:10,430 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 22:53:10,509 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 22:53:10,533 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 22:53:10,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:53:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2021-10-28 22:53:10,785 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 22:53:10,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:53:10,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24083611] [2021-10-28 22:53:10,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24083611] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:10,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:10,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-28 22:53:10,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638781423] [2021-10-28 22:53:10,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:53:10,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:53:10,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:53:10,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:53:10,790 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:11,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:11,334 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2021-10-28 22:53:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:53:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 22:53:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:11,340 INFO L225 Difference]: With dead ends: 86 [2021-10-28 22:53:11,340 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 22:53:11,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:53:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 22:53:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-10-28 22:53:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-10-28 22:53:11,348 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 16 [2021-10-28 22:53:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:11,349 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-10-28 22:53:11,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-10-28 22:53:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:53:11,350 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:11,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:11,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:11,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:53:11,551 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:53:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -718408589, now seen corresponding path program 1 times [2021-10-28 22:53:11,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:53:11,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046803069] [2021-10-28 22:53:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:11,553 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:53:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:53:11,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:53:11,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 22:53:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:11,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:53:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:11,810 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 22:53:11,846 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 22:53:11,892 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 22:53:11,932 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 22:53:11,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:53:12,031 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 22:53:12,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:53:12,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046803069] [2021-10-28 22:53:12,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046803069] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:12,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:12,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 22:53:12,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228149791] [2021-10-28 22:53:12,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:53:12,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:53:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:53:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:53:12,034 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:12,478 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-10-28 22:53:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:53:12,480 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 22:53:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:12,481 INFO L225 Difference]: With dead ends: 66 [2021-10-28 22:53:12,481 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 22:53:12,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 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 22:53:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 22:53:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-10-28 22:53:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-10-28 22:53:12,488 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 17 [2021-10-28 22:53:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:12,489 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-10-28 22:53:12,489 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 22:53:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-10-28 22:53:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:53:12,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:12,491 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:12,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:12,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:53:12,706 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:53:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -718408588, now seen corresponding path program 1 times [2021-10-28 22:53:12,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:53:12,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553907236] [2021-10-28 22:53:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:12,707 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:53:12,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:53:12,710 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:53:12,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 22:53:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:53:12,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:12,963 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 22:53:13,015 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 22:53:13,026 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 22:53:13,070 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 22:53:13,076 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 22:53:13,147 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 22:53:13,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:53:13,545 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 22:53:13,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:53:13,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553907236] [2021-10-28 22:53:13,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553907236] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:13,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:13,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-28 22:53:13,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638662378] [2021-10-28 22:53:13,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:53:13,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:53:13,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:53:13,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:53:13,547 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:14,410 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-28 22:53:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:53:14,414 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 22:53:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:14,415 INFO L225 Difference]: With dead ends: 62 [2021-10-28 22:53:14,415 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 22:53:14,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:53:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 22:53:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-10-28 22:53:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 38 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-28 22:53:14,422 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 17 [2021-10-28 22:53:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:14,422 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-28 22:53:14,423 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 22:53:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-28 22:53:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:53:14,424 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:14,424 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:14,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:14,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:53:14,631 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:53:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash -324277973, now seen corresponding path program 1 times [2021-10-28 22:53:14,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:53:14,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845360378] [2021-10-28 22:53:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:14,632 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:53:14,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:53:14,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:53:14,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 22:53:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:14,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 22:53:14,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:14,881 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 22:53:14,892 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 22:53:15,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-28 22:53:15,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-28 22:53:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:53:15,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:53:15,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-28 22:53:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:53:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:53:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:53:15,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:53:15,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845360378] [2021-10-28 22:53:15,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845360378] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 22:53:15,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:15,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-10-28 22:53:15,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163539845] [2021-10-28 22:53:15,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:53:15,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:53:15,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:53:15,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:53:15,234 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:15,940 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-10-28 22:53:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:53:15,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 22:53:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:15,942 INFO L225 Difference]: With dead ends: 57 [2021-10-28 22:53:15,942 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 22:53:15,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:53:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 22:53:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2021-10-28 22:53:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-28 22:53:15,947 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 19 [2021-10-28 22:53:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:15,948 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-28 22:53:15,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:53:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-28 22:53:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 22:53:15,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:15,949 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 22:53:15,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:16,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:53:16,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-10-28 22:53:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1462683817, now seen corresponding path program 1 times [2021-10-28 22:53:16,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:53:16,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054450523] [2021-10-28 22:53:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:16,157 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:53:16,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:53:16,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:53:16,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 22:53:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:53:16,356 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 22:53:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:53:16,442 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 22:53:16,443 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 22:53:16,444 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr15ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:53:16,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:53:16,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:53:16,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 22:53:16,446 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 22:53:16,461 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 22:53:16,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 22:53:16,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 22:53:16,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 22:53:16,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 22:53:16,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 22:53:16,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 22:53:16,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 22:53:16,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:53:16,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 22:53:16,463 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 22:53:16,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:16,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:53:16,687 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:16,689 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:53:16,699 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 22:53:16,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:53:16 BoogieIcfgContainer [2021-10-28 22:53:16,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:53:16,721 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:53:16,721 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:53:16,721 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:53:16,722 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:53:06" (3/4) ... [2021-10-28 22:53:16,725 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 22:53:16,725 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:53:16,726 INFO L168 Benchmark]: Toolchain (without parser) took 12021.93 ms. Allocated memory was 83.9 MB in the beginning and 119.5 MB in the end (delta: 35.7 MB). Free memory was 47.6 MB in the beginning and 87.2 MB in the end (delta: -39.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:53:16,727 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 83.9 MB. Free memory was 65.1 MB in the beginning and 65.0 MB in the end (delta: 72.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:53:16,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.28 ms. Allocated memory is still 83.9 MB. Free memory was 47.3 MB in the beginning and 61.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:53:16,728 INFO L168 Benchmark]: Boogie Preprocessor took 153.79 ms. Allocated memory is still 83.9 MB. Free memory was 61.0 MB in the beginning and 58.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:53:16,728 INFO L168 Benchmark]: RCFGBuilder took 1090.29 ms. Allocated memory is still 83.9 MB. Free memory was 58.0 MB in the beginning and 64.2 MB in the end (delta: -6.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:53:16,729 INFO L168 Benchmark]: TraceAbstraction took 10103.87 ms. Allocated memory was 83.9 MB in the beginning and 119.5 MB in the end (delta: 35.7 MB). Free memory was 63.5 MB in the beginning and 88.2 MB in the end (delta: -24.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-28 22:53:16,729 INFO L168 Benchmark]: Witness Printer took 4.85 ms. Allocated memory is still 119.5 MB. Free memory is still 87.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:53:16,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 83.9 MB. Free memory was 65.1 MB in the beginning and 65.0 MB in the end (delta: 72.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 662.28 ms. Allocated memory is still 83.9 MB. Free memory was 47.3 MB in the beginning and 61.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 153.79 ms. Allocated memory is still 83.9 MB. Free memory was 61.0 MB in the beginning and 58.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1090.29 ms. Allocated memory is still 83.9 MB. Free memory was 58.0 MB in the beginning and 64.2 MB in the end (delta: -6.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10103.87 ms. Allocated memory was 83.9 MB in the beginning and 119.5 MB in the end (delta: 35.7 MB). Free memory was 63.5 MB in the beginning and 88.2 MB in the end (delta: -24.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.85 ms. Allocated memory is still 119.5 MB. Free memory is still 87.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={1:0}] [L534] List t; [L535] List p = a; VAL [a={1:0}, p={1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={1:0}, p={1:0}] [L544] p->n = 0 VAL [a={1:0}, p={1:0}] [L545] p = a VAL [a={1:0}, p={1:0}] [L546] COND TRUE p!=0 VAL [a={1:0}, p={1:0}] [L547] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={1:0}, p={1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 74 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 9.9s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 191 SDtfs, 381 SDslu, 443 SDs, 0 SdLazy, 627 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 221 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=4, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 97 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 194 ConstructedInterpolants, 1 QuantifiedInterpolants, 994 SizeOfPredicates, 32 NumberOfNonLiveVariables, 561 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 22:53:16,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40b56627-915e-46b4-860f-b48639e3e765/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...