./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be --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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be --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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:36:53,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:36:53,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:36:53,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:36:53,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:36:53,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:36:53,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:36:53,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:36:53,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:36:53,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:36:53,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:36:53,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:36:53,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:36:53,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:36:53,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:36:53,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:36:53,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:36:53,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:36:53,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:36:53,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:36:53,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:36:53,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:36:53,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:36:53,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:36:53,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:36:53,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:36:53,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:36:53,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:36:53,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:36:53,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:36:53,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:36:53,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:36:53,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:36:53,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:36:53,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:36:53,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:36:53,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:36:53,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:36:53,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:36:53,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:36:53,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:36:53,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:36:53,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:36:53,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:36:53,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:36:53,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:36:53,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:36:53,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:36:53,306 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:36:53,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:36:53,307 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:36:53,307 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:36:53,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:36:53,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:36:53,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:36:53,309 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:36:53,309 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:36:53,310 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:36:53,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:36:53,310 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:36:53,310 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:36:53,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:36:53,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:36:53,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:36:53,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:36:53,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:36:53,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:36:53,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:36:53,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:36:53,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:36:53,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:36:53,313 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_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-10-21 19:36:53,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:36:53,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:36:53,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:36:53,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:36:53,619 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:36:53,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-21 19:36:53,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data/44d804239/60dfd3def33a4a71a7cd06f1e9f75733/FLAG9f49aea81 [2021-10-21 19:36:54,295 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:36:54,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-21 19:36:54,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data/44d804239/60dfd3def33a4a71a7cd06f1e9f75733/FLAG9f49aea81 [2021-10-21 19:36:54,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data/44d804239/60dfd3def33a4a71a7cd06f1e9f75733 [2021-10-21 19:36:54,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:36:54,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:36:54,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:36:54,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:36:54,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:36:54,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:36:54" (1/1) ... [2021-10-21 19:36:54,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bca6e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:54, skipping insertion in model container [2021-10-21 19:36:54,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:36:54" (1/1) ... [2021-10-21 19:36:54,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:36:54,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:36:54,974 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_4e58fcc8-a54e-4894-9aff-7527232789b9/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-21 19:36:54,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:36:54,987 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:36:55,024 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_4e58fcc8-a54e-4894-9aff-7527232789b9/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-21 19:36:55,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:36:55,064 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:36:55,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55 WrapperNode [2021-10-21 19:36:55,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:36:55,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:36:55,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:36:55,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:36:55,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (1/1) ... [2021-10-21 19:36:55,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (1/1) ... [2021-10-21 19:36:55,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (1/1) ... [2021-10-21 19:36:55,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (1/1) ... [2021-10-21 19:36:55,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (1/1) ... [2021-10-21 19:36:55,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (1/1) ... [2021-10-21 19:36:55,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (1/1) ... [2021-10-21 19:36:55,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:36:55,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:36:55,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:36:55,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:36:55,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (1/1) ... [2021-10-21 19:36:55,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:36:55,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:55,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:36:55,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:36:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:36:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:36:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:36:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:36:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:36:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:36:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:36:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:36:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:36:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:36:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:36:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:36:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:36:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:36:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:36:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:36:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:36:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:36:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:36:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:36:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:36:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:36:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:36:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:36:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:36:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:36:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:36:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:36:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:36:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:36:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:36:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:36:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:36:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:36:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:36:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:36:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:36:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:36:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:36:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:36:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:36:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:36:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:36:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:36:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:36:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:36:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:36:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:36:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:36:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:36:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:36:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:36:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:36:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:36:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:36:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:36:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:36:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:36:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:36:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:36:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:36:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:36:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:36:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:36:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:36:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:36:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:36:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:36:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:36:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:36:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:36:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:36:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:36:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:36:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:36:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:36:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:36:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:36:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:36:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:36:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:36:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:36:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:36:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:36:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:36:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:36:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:36:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:36:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:36:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:36:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:36:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:36:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:36:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:36:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:36:55,218 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:36:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:36:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:36:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:36:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:36:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:36:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:36:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:36:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:36:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:36:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:36:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:36:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:36:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:36:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:36:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:36:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:36:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:36:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:36:55,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:36:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:36:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:36:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:36:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:36:55,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:36:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:36:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:36:55,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:36:55,477 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:36:55,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:36:55,653 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:36:55,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:36:55 BoogieIcfgContainer [2021-10-21 19:36:55,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:36:55,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:36:55,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:36:55,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:36:55,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:36:54" (1/3) ... [2021-10-21 19:36:55,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a60c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:36:55, skipping insertion in model container [2021-10-21 19:36:55,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:36:55" (2/3) ... [2021-10-21 19:36:55,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a60c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:36:55, skipping insertion in model container [2021-10-21 19:36:55,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:36:55" (3/3) ... [2021-10-21 19:36:55,665 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-21 19:36:55,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:36:55,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-21 19:36:55,730 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:36:55,735 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 [2021-10-21 19:36:55,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-21 19:36:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:36:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:36:55,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:55,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:55,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1752578520, now seen corresponding path program 1 times [2021-10-21 19:36:55,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:55,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005476734] [2021-10-21 19:36:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:55,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:55,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:55,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:55,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005476734] [2021-10-21 19:36:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005476734] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:55,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:55,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:36:55,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623064118] [2021-10-21 19:36:56,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:36:56,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:36:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:36:56,027 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-21 19:36:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:56,174 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-10-21 19:36:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:36:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 9 [2021-10-21 19:36:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:56,186 INFO L225 Difference]: With dead ends: 50 [2021-10-21 19:36:56,187 INFO L226 Difference]: Without dead ends: 42 [2021-10-21 19:36:56,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:36:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-21 19:36:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-10-21 19:36:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 32 states have internal predecessors, (40), 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) [2021-10-21 19:36:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-10-21 19:36:56,228 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2021-10-21 19:36:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:56,229 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-10-21 19:36:56,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-21 19:36:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-10-21 19:36:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:36:56,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:56,230 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:56,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:36:56,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1503990498, now seen corresponding path program 1 times [2021-10-21 19:36:56,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:56,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806358232] [2021-10-21 19:36:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:56,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:56,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:56,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806358232] [2021-10-21 19:36:56,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806358232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:56,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:56,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:36:56,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618946941] [2021-10-21 19:36:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:36:56,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:36:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:36:56,371 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-10-21 19:36:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:56,470 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-21 19:36:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:36:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-10-21 19:36:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:56,474 INFO L225 Difference]: With dead ends: 40 [2021-10-21 19:36:56,475 INFO L226 Difference]: Without dead ends: 39 [2021-10-21 19:36:56,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:36:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-21 19:36:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-10-21 19:36:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 27 states have internal predecessors, (29), 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) [2021-10-21 19:36:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-21 19:36:56,485 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 10 [2021-10-21 19:36:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:56,485 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-21 19:36:56,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-10-21 19:36:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-21 19:36:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:36:56,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:56,486 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:56,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:36:56,487 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:56,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1503991813, now seen corresponding path program 1 times [2021-10-21 19:36:56,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:56,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228074945] [2021-10-21 19:36:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:56,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:56,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:56,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228074945] [2021-10-21 19:36:56,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228074945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:56,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:56,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:36:56,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201140580] [2021-10-21 19:36:56,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:36:56,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:36:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:36:56,569 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-21 19:36:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:56,621 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-21 19:36:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:36:56,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2021-10-21 19:36:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:56,622 INFO L225 Difference]: With dead ends: 29 [2021-10-21 19:36:56,623 INFO L226 Difference]: Without dead ends: 29 [2021-10-21 19:36:56,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:36:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-21 19:36:56,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-21 19:36:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-10-21 19:36:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-21 19:36:56,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2021-10-21 19:36:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:56,628 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-21 19:36:56,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-21 19:36:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-21 19:36:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:36:56,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:56,629 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:56,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:36:56,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1503991814, now seen corresponding path program 1 times [2021-10-21 19:36:56,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:56,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235719307] [2021-10-21 19:36:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:56,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:56,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:56,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235719307] [2021-10-21 19:36:56,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235719307] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:56,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:56,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:36:56,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950008136] [2021-10-21 19:36:56,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:36:56,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:36:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:36:56,706 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-21 19:36:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:56,788 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-21 19:36:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:36:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2021-10-21 19:36:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:56,790 INFO L225 Difference]: With dead ends: 27 [2021-10-21 19:36:56,790 INFO L226 Difference]: Without dead ends: 27 [2021-10-21 19:36:56,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:36:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-21 19:36:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-21 19:36:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-10-21 19:36:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-21 19:36:56,795 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2021-10-21 19:36:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:56,795 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-21 19:36:56,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-21 19:36:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-21 19:36:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:36:56,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:56,797 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:56,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:36:56,797 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:56,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:56,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629249, now seen corresponding path program 1 times [2021-10-21 19:36:56,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:56,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784885403] [2021-10-21 19:36:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:56,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:56,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:56,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784885403] [2021-10-21 19:36:56,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784885403] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:56,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:56,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:36:56,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823352853] [2021-10-21 19:36:56,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:36:56,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:36:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:36:56,924 INFO L87 Difference]: Start difference. First operand 27 states and 28 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) [2021-10-21 19:36:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:56,995 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-10-21 19:36:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:36:56,995 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 [2021-10-21 19:36:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:56,996 INFO L225 Difference]: With dead ends: 42 [2021-10-21 19:36:56,997 INFO L226 Difference]: Without dead ends: 42 [2021-10-21 19:36:56,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:36:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-21 19:36:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-10-21 19:36:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-10-21 19:36:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-21 19:36:57,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-10-21 19:36:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:57,002 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-21 19:36:57,002 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) [2021-10-21 19:36:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-21 19:36:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:36:57,003 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:57,003 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:57,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:36:57,004 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:57,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629292, now seen corresponding path program 1 times [2021-10-21 19:36:57,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:57,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072944059] [2021-10-21 19:36:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:57,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:57,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:57,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072944059] [2021-10-21 19:36:57,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072944059] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:57,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:57,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:36:57,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807299745] [2021-10-21 19:36:57,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:36:57,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:57,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:36:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:36:57,070 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2021-10-21 19:36:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:57,139 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-10-21 19:36:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:36:57,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 [2021-10-21 19:36:57,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:57,141 INFO L225 Difference]: With dead ends: 33 [2021-10-21 19:36:57,141 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:36:57,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:36:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:36:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-21 19:36:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-10-21 19:36:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-21 19:36:57,145 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-10-21 19:36:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:57,146 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 19:36:57,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2021-10-21 19:36:57,146 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-21 19:36:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:36:57,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:57,147 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:57,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:36:57,148 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2071629293, now seen corresponding path program 1 times [2021-10-21 19:36:57,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:57,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139468084] [2021-10-21 19:36:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:57,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:57,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:57,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139468084] [2021-10-21 19:36:57,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139468084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:57,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:57,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:36:57,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478620785] [2021-10-21 19:36:57,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:36:57,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:36:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:36:57,227 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2021-10-21 19:36:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:57,301 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-21 19:36:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:36:57,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 [2021-10-21 19:36:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:57,303 INFO L225 Difference]: With dead ends: 37 [2021-10-21 19:36:57,303 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 19:36:57,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:36:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 19:36:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-21 19:36:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 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) [2021-10-21 19:36:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-21 19:36:57,307 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2021-10-21 19:36:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:57,308 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-21 19:36:57,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2021-10-21 19:36:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-21 19:36:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:36:57,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:57,309 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:57,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:36:57,310 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2029074739, now seen corresponding path program 1 times [2021-10-21 19:36:57,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:57,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95815465] [2021-10-21 19:36:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:57,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:36:57,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:57,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95815465] [2021-10-21 19:36:57,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95815465] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:36:57,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:36:57,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:36:57,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688054133] [2021-10-21 19:36:57,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:36:57,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:36:57,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:36:57,392 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-21 19:36:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:57,470 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-21 19:36:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:36:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 18 [2021-10-21 19:36:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:57,472 INFO L225 Difference]: With dead ends: 34 [2021-10-21 19:36:57,472 INFO L226 Difference]: Without dead ends: 34 [2021-10-21 19:36:57,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:36:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-21 19:36:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-21 19:36:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-10-21 19:36:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-21 19:36:57,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-10-21 19:36:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:57,477 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-21 19:36:57,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-21 19:36:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-21 19:36:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:36:57,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:57,478 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:57,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:36:57,479 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:36:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash -790989135, now seen corresponding path program 1 times [2021-10-21 19:36:57,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:57,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857567520] [2021-10-21 19:36:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:57,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:36:57,495 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:36:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:36:57,536 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:36:57,544 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:36:57,546 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:36:57,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:36:57,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:36:57,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:36:57,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:36:57,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 19:36:57,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 19:36:57,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:36:57,557 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 19:36:57,557 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 19:36:57,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:36:57,564 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:36:57,573 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 19:36:57,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:36:57 BoogieIcfgContainer [2021-10-21 19:36:57,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:36:57,586 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:36:57,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:36:57,587 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:36:57,587 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:36:55" (3/4) ... [2021-10-21 19:36:57,590 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:36:57,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:36:57,592 INFO L168 Benchmark]: Toolchain (without parser) took 2988.25 ms. Allocated memory was 107.0 MB in the beginning and 144.7 MB in the end (delta: 37.7 MB). Free memory was 77.2 MB in the beginning and 56.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 54.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:57,593 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 107.0 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:36:57,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 457.42 ms. Allocated memory is still 107.0 MB. Free memory was 77.0 MB in the beginning and 72.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:57,594 INFO L168 Benchmark]: Boogie Preprocessor took 55.58 ms. Allocated memory is still 107.0 MB. Free memory was 72.3 MB in the beginning and 69.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:57,594 INFO L168 Benchmark]: RCFGBuilder took 533.51 ms. Allocated memory is still 107.0 MB. Free memory was 69.8 MB in the beginning and 50.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:57,595 INFO L168 Benchmark]: TraceAbstraction took 1928.21 ms. Allocated memory was 107.0 MB in the beginning and 144.7 MB in the end (delta: 37.7 MB). Free memory was 50.1 MB in the beginning and 56.7 MB in the end (delta: -6.6 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:36:57,595 INFO L168 Benchmark]: Witness Printer took 4.14 ms. Allocated memory is still 144.7 MB. Free memory is still 56.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:36:57,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 107.0 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 457.42 ms. Allocated memory is still 107.0 MB. Free memory was 77.0 MB in the beginning and 72.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.58 ms. Allocated memory is still 107.0 MB. Free memory was 72.3 MB in the beginning and 69.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 533.51 ms. Allocated memory is still 107.0 MB. Free memory was 69.8 MB in the beginning and 50.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1928.21 ms. Allocated memory was 107.0 MB in the beginning and 144.7 MB in the end (delta: 37.7 MB). Free memory was 50.1 MB in the beginning and 56.7 MB in the end (delta: -6.6 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.14 ms. Allocated memory is still 144.7 MB. Free memory is still 56.7 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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 t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={-1:0}] [L537] t->h = 1 VAL [p={0:0}, t={-1:0}] [L538] t->n = p VAL [p={0:0}, t={-1:0}] [L539] p = t VAL [p={-1:0}, t={-1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={-1:0}, t={-1:0}] [L542] EXPR p->h VAL [p={-1:0}, p->h=1, t={-1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={-1:0}, p->n={0:0}, t={-1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={-1:0}] - 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: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: 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 all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: 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, 54 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 1834.8ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 22.1ms, AutomataDifference: 738.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 151 SDtfs, 202 SDslu, 103 SDs, 0 SdLazy, 402 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 407.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 247.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=1, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 51.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.6ms SsaConstructionTime, 121.1ms SatisfiabilityAnalysisTime, 533.0ms InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 478 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 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 [2021-10-21 19:36:57,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:37:00,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:37:00,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:37:00,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:37:00,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:37:00,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:37:00,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:37:00,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:37:00,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:37:00,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:37:00,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:37:00,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:37:00,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:37:00,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:37:00,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:37:00,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:37:00,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:37:00,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:37:00,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:37:00,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:37:00,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:37:00,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:37:00,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:37:00,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:37:00,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:37:00,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:37:00,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:37:00,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:37:00,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:37:00,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:37:00,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:37:00,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:37:00,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:37:00,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:37:00,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:37:00,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:37:00,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:37:00,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:37:00,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:37:00,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:37:00,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:37:00,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-21 19:37:00,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:37:00,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:37:00,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:37:00,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:37:00,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:37:00,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:37:00,302 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:37:00,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:37:00,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:37:00,303 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:37:00,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:37:00,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:37:00,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:37:00,305 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:37:00,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:37:00,305 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:37:00,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:37:00,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:37:00,306 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:37:00,306 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:37:00,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:37:00,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:37:00,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:37:00,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:37:00,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:37:00,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:37:00,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:37:00,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:37:00,308 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:37:00,308 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:37:00,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:37:00,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:37:00,309 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_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-10-21 19:37:00,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:37:00,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:37:00,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:37:00,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:37:00,770 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:37:00,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-21 19:37:00,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data/a08ad5213/17a59966d3594b3f9c25355b9057b481/FLAG48fdf2b9a [2021-10-21 19:37:01,542 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:37:01,545 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-21 19:37:01,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data/a08ad5213/17a59966d3594b3f9c25355b9057b481/FLAG48fdf2b9a [2021-10-21 19:37:01,803 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/data/a08ad5213/17a59966d3594b3f9c25355b9057b481 [2021-10-21 19:37:01,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:37:01,814 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:37:01,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:37:01,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:37:01,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:37:01,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:37:01" (1/1) ... [2021-10-21 19:37:01,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e4cb7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:01, skipping insertion in model container [2021-10-21 19:37:01,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:37:01" (1/1) ... [2021-10-21 19:37:01,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:37:01,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:37:02,283 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_4e58fcc8-a54e-4894-9aff-7527232789b9/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-21 19:37:02,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:37:02,310 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:37:02,358 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_4e58fcc8-a54e-4894-9aff-7527232789b9/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-21 19:37:02,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:37:02,393 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:37:02,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02 WrapperNode [2021-10-21 19:37:02,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:37:02,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:37:02,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:37:02,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:37:02,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (1/1) ... [2021-10-21 19:37:02,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (1/1) ... [2021-10-21 19:37:02,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (1/1) ... [2021-10-21 19:37:02,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (1/1) ... [2021-10-21 19:37:02,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (1/1) ... [2021-10-21 19:37:02,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (1/1) ... [2021-10-21 19:37:02,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (1/1) ... [2021-10-21 19:37:02,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:37:02,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:37:02,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:37:02,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:37:02,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (1/1) ... [2021-10-21 19:37:02,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:37:02,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:02,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:37:02,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:37:02,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:37:02,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:37:02,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:37:02,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:37:02,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:37:02,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:37:02,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:37:02,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:37:02,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:37:02,584 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:37:02,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:37:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:37:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:37:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:37:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:37:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:37:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:37:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:37:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:37:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:37:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:37:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:37:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:37:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:37:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:37:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:37:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:37:02,588 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:37:02,588 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:37:02,588 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:37:02,588 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:37:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:37:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:37:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:37:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:37:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:37:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:37:02,590 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:37:02,590 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:37:02,590 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:37:02,590 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:37:02,590 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:37:02,591 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:37:02,591 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:37:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:37:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:37:02,593 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:37:02,593 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:37:02,593 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:37:02,594 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:37:02,594 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:37:02,594 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:37:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:37:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:37:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:37:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:37:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:37:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:37:02,596 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:37:02,596 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:37:02,596 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:37:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:37:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:37:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:37:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:37:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:37:02,600 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:37:02,600 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:37:02,600 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:37:02,600 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:37:02,600 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:37:02,601 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:37:02,601 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:37:02,601 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:37:02,601 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:37:02,601 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:37:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:37:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:37:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:37:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:37:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:37:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:37:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:37:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:37:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:37:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:37:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:37:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:37:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:37:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:37:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:37:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:37:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:37:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:37:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:37:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:37:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:37:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:37:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:37:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:37:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:37:02,609 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:37:02,610 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:37:02,610 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:37:02,610 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:37:02,610 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:37:02,611 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:37:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:37:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:37:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:37:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:37:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:37:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:37:02,614 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:37:02,615 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:37:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:37:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:37:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 19:37:02,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:37:02,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 19:37:02,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:37:02,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:37:02,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:37:02,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:37:02,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:37:02,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 19:37:02,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 19:37:02,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:37:03,094 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:37:03,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:37:03,324 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:37:03,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:03 BoogieIcfgContainer [2021-10-21 19:37:03,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:37:03,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:37:03,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:37:03,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:37:03,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:37:01" (1/3) ... [2021-10-21 19:37:03,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6f8413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:37:03, skipping insertion in model container [2021-10-21 19:37:03,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:02" (2/3) ... [2021-10-21 19:37:03,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6f8413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:37:03, skipping insertion in model container [2021-10-21 19:37:03,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:03" (3/3) ... [2021-10-21 19:37:03,339 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-21 19:37:03,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:37:03,345 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-21 19:37:03,397 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:37:03,405 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 [2021-10-21 19:37:03,405 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-21 19:37:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:37:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:37:03,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:03,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:03,428 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:03,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1599181994, now seen corresponding path program 1 times [2021-10-21 19:37:03,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:03,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859173074] [2021-10-21 19:37:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:03,448 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:03,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:03,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:03,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:37:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:37:03,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:03,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:37:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:03,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:37:03,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859173074] [2021-10-21 19:37:03,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859173074] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:03,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:03,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:37:03,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514715917] [2021-10-21 19:37:03,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:37:03,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:37:03,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:37:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:37:03,795 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-21 19:37:03,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:03,894 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-10-21 19:37:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:37:03,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 9 [2021-10-21 19:37:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:03,905 INFO L225 Difference]: With dead ends: 47 [2021-10-21 19:37:03,905 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:37:03,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:37:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:37:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-10-21 19:37:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 30 states have internal predecessors, (38), 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) [2021-10-21 19:37:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-10-21 19:37:03,942 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 9 [2021-10-21 19:37:03,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:03,943 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-10-21 19:37:03,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-21 19:37:03,943 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-10-21 19:37:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:37:03,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:03,944 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:03,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:04,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:04,159 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:04,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1599182037, now seen corresponding path program 1 times [2021-10-21 19:37:04,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:04,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116422675] [2021-10-21 19:37:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:04,160 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:04,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:04,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:37:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:37:04,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:04,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:37:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:04,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:37:04,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116422675] [2021-10-21 19:37:04,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116422675] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:04,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:04,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 19:37:04,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663207289] [2021-10-21 19:37:04,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:37:04,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:37:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:37:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:37:04,486 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-21 19:37:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:04,569 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-10-21 19:37:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:37:04,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 9 [2021-10-21 19:37:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:04,571 INFO L225 Difference]: With dead ends: 38 [2021-10-21 19:37:04,571 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 19:37:04,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:37:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 19:37:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-10-21 19:37:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.6875) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-10-21 19:37:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-21 19:37:04,577 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2021-10-21 19:37:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:04,577 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-21 19:37:04,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-21 19:37:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-21 19:37:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:37:04,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:04,578 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:04,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:04,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:04,798 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1599183352, now seen corresponding path program 1 times [2021-10-21 19:37:04,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:04,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464632831] [2021-10-21 19:37:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:04,800 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:04,802 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:04,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:37:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:04,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:37:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:04,990 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 [2021-10-21 19:37:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:05,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:37:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:05,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:37:05,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464632831] [2021-10-21 19:37:05,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464632831] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:05,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:05,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:37:05,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196998465] [2021-10-21 19:37:05,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:37:05,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:37:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:37:05,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:37:05,081 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-21 19:37:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:05,145 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-21 19:37:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:37:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 9 [2021-10-21 19:37:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:05,147 INFO L225 Difference]: With dead ends: 27 [2021-10-21 19:37:05,148 INFO L226 Difference]: Without dead ends: 27 [2021-10-21 19:37:05,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:37:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-21 19:37:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-21 19:37:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.5625) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-10-21 19:37:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-21 19:37:05,152 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2021-10-21 19:37:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:05,153 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-21 19:37:05,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-21 19:37:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-21 19:37:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:37:05,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:05,154 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:05,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:05,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:05,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:05,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1599183353, now seen corresponding path program 1 times [2021-10-21 19:37:05,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:05,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613586852] [2021-10-21 19:37:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:05,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:05,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:05,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:05,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:37:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:05,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:37:05,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:05,543 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 [2021-10-21 19:37:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:05,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:37:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:05,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:37:05,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613586852] [2021-10-21 19:37:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613586852] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:05,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:05,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-21 19:37:05,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965138711] [2021-10-21 19:37:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:37:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:37:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:37:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:37:05,681 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-21 19:37:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:05,752 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-21 19:37:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:37:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-10-21 19:37:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:05,755 INFO L225 Difference]: With dead ends: 25 [2021-10-21 19:37:05,755 INFO L226 Difference]: Without dead ends: 25 [2021-10-21 19:37:05,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:37:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-21 19:37:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-21 19:37:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-10-21 19:37:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-21 19:37:05,759 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2021-10-21 19:37:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:05,759 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-21 19:37:05,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-21 19:37:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-21 19:37:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:37:05,760 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:05,760 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:05,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:05,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:05,971 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042382, now seen corresponding path program 1 times [2021-10-21 19:37:05,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:05,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959327738] [2021-10-21 19:37:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:05,974 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:05,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:05,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:05,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 19:37:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:37:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:06,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:37:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:06,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:37:06,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959327738] [2021-10-21 19:37:06,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959327738] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:06,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:06,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-21 19:37:06,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085607491] [2021-10-21 19:37:06,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:37:06,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:37:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:37:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:37:06,252 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-21 19:37:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:06,367 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-21 19:37:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:37:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-10-21 19:37:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:06,369 INFO L225 Difference]: With dead ends: 40 [2021-10-21 19:37:06,369 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:37:06,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:37:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:37:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-10-21 19:37:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-10-21 19:37:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-21 19:37:06,374 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2021-10-21 19:37:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:06,374 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-21 19:37:06,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-21 19:37:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-21 19:37:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:37:06,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:06,376 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:06,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:06,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:06,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042425, now seen corresponding path program 1 times [2021-10-21 19:37:06,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:06,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524747589] [2021-10-21 19:37:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:06,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:06,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:06,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:06,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 19:37:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:37:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:06,769 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 [2021-10-21 19:37:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:37:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:06,889 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:37:06,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524747589] [2021-10-21 19:37:06,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524747589] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:06,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:06,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 19:37:06,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647256300] [2021-10-21 19:37:06,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:37:06,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:37:06,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:37:06,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:37:06,895 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-21 19:37:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:07,020 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-21 19:37:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:37:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-10-21 19:37:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:07,021 INFO L225 Difference]: With dead ends: 31 [2021-10-21 19:37:07,021 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 19:37:07,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:37:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 19:37:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-21 19:37:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-10-21 19:37:07,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-21 19:37:07,024 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2021-10-21 19:37:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:07,024 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-21 19:37:07,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-21 19:37:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-21 19:37:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:37:07,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:07,025 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:07,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:07,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:07,233 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1238042426, now seen corresponding path program 1 times [2021-10-21 19:37:07,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:07,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914711503] [2021-10-21 19:37:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:07,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:07,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:07,241 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:07,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 19:37:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:07,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:37:07,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:07,414 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 [2021-10-21 19:37:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:07,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:37:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:07,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:37:07,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914711503] [2021-10-21 19:37:07,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914711503] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:07,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:07,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-21 19:37:07,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130527418] [2021-10-21 19:37:07,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:37:07,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:37:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:37:07,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:37:07,723 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-21 19:37:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:07,915 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-10-21 19:37:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:37:07,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 14 [2021-10-21 19:37:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:07,917 INFO L225 Difference]: With dead ends: 35 [2021-10-21 19:37:07,917 INFO L226 Difference]: Without dead ends: 35 [2021-10-21 19:37:07,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:37:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-21 19:37:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-21 19:37:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-10-21 19:37:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-21 19:37:07,921 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-10-21 19:37:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:07,922 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 19:37:07,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-10-21 19:37:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-21 19:37:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:37:07,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:07,923 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:07,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:08,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:08,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash 52831098, now seen corresponding path program 1 times [2021-10-21 19:37:08,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:08,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189267006] [2021-10-21 19:37:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:08,133 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:08,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:08,138 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:08,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 19:37:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:37:08,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:08,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:37:08,382 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:37:08,383 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 [2021-10-21 19:37:08,435 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 [2021-10-21 19:37:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:08,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:37:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:37:08,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:37:08,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189267006] [2021-10-21 19:37:08,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189267006] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:08,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:08,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-21 19:37:08,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146493791] [2021-10-21 19:37:08,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:37:08,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:37:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:37:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:37:08,532 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-10-21 19:37:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:08,685 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-21 19:37:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:37:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 [2021-10-21 19:37:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:08,688 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:37:08,688 INFO L226 Difference]: Without dead ends: 32 [2021-10-21 19:37:08,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:37:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-21 19:37:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-10-21 19:37:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.3) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-10-21 19:37:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-21 19:37:08,693 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-10-21 19:37:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:08,693 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-21 19:37:08,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-10-21 19:37:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-21 19:37:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:37:08,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:08,694 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:08,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:08,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:08,895 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:37:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:08,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1938067545, now seen corresponding path program 1 times [2021-10-21 19:37:08,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:37:08,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076443315] [2021-10-21 19:37:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:08,896 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:37:08,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:37:08,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:37:08,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-21 19:37:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:37:09,113 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:37:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:37:09,221 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 19:37:09,221 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:37:09,222 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:37:09,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:37:09,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:37:09,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:37:09,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:37:09,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 19:37:09,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 19:37:09,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:37:09,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 19:37:09,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 19:37:09,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:09,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:37:09,431 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:37:09,439 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 19:37:09,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:37:09 BoogieIcfgContainer [2021-10-21 19:37:09,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:37:09,461 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:37:09,461 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:37:09,462 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:37:09,463 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:03" (3/4) ... [2021-10-21 19:37:09,466 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:37:09,469 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:37:09,471 INFO L168 Benchmark]: Toolchain (without parser) took 7655.98 ms. Allocated memory was 75.5 MB in the beginning and 107.0 MB in the end (delta: 31.5 MB). Free memory was 51.4 MB in the beginning and 33.4 MB in the end (delta: 18.0 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:09,473 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 54.5 MB. Free memory is still 34.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:37:09,474 INFO L168 Benchmark]: CACSL2BoogieTranslator took 576.36 ms. Allocated memory is still 75.5 MB. Free memory was 51.1 MB in the beginning and 51.2 MB in the end (delta: -98.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:09,474 INFO L168 Benchmark]: Boogie Preprocessor took 86.16 ms. Allocated memory is still 75.5 MB. Free memory was 51.2 MB in the beginning and 48.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:09,475 INFO L168 Benchmark]: RCFGBuilder took 846.13 ms. Allocated memory is still 75.5 MB. Free memory was 48.1 MB in the beginning and 46.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:09,476 INFO L168 Benchmark]: TraceAbstraction took 6129.73 ms. Allocated memory was 75.5 MB in the beginning and 107.0 MB in the end (delta: 31.5 MB). Free memory was 45.4 MB in the beginning and 34.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:37:09,476 INFO L168 Benchmark]: Witness Printer took 8.37 ms. Allocated memory is still 107.0 MB. Free memory was 34.4 MB in the beginning and 33.4 MB in the end (delta: 969.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:37:09,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 54.5 MB. Free memory is still 34.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 576.36 ms. Allocated memory is still 75.5 MB. Free memory was 51.1 MB in the beginning and 51.2 MB in the end (delta: -98.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 86.16 ms. Allocated memory is still 75.5 MB. Free memory was 51.2 MB in the beginning and 48.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 846.13 ms. Allocated memory is still 75.5 MB. Free memory was 48.1 MB in the beginning and 46.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6129.73 ms. Allocated memory was 75.5 MB in the beginning and 107.0 MB in the end (delta: 31.5 MB). Free memory was 45.4 MB in the beginning and 34.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.1 GB. * Witness Printer took 8.37 ms. Allocated memory is still 107.0 MB. Free memory was 34.4 MB in the beginning and 33.4 MB in the end (delta: 969.3 kB). 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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 t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={1:0}] [L537] t->h = 1 VAL [p={0:0}, t={1:0}] [L538] t->n = p VAL [p={0:0}, t={1:0}] [L539] p = t VAL [p={1:0}, t={1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={1:0}, t={1:0}] [L542] EXPR p->h VAL [p={1:0}, p->h=1, t={1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={1:0}, p->n={0:0}, t={1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={1:0}] - 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: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: 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 all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: 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, 59 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 6034.1ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 17.2ms, AutomataDifference: 963.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 153 SDtfs, 203 SDslu, 118 SDs, 0 SdLazy, 193 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 607.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 267.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 90.3ms SsaConstructionTime, 256.0ms SatisfiabilityAnalysisTime, 1468.3ms InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 172 ConstructedInterpolants, 0 QuantifiedInterpolants, 648 SizeOfPredicates, 9 NumberOfNonLiveVariables, 556 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 8/8 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 [2021-10-21 19:37:09,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e58fcc8-a54e-4894-9aff-7527232789b9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...