./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt --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 af5a9640b82bb5981acfe21e6355734b41317c49 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt --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 af5a9640b82bb5981acfe21e6355734b41317c49 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:12:57,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:12:57,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:12:57,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:12:57,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:12:57,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:12:57,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:12:57,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:12:57,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:12:57,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:12:57,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:12:57,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:12:57,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:12:57,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:12:57,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:12:57,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:12:57,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:12:57,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:12:57,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:12:57,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:12:57,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:12:57,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:12:58,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:12:58,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:12:58,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:12:58,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:12:58,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:12:58,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:12:58,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:12:58,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:12:58,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:12:58,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:12:58,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:12:58,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:12:58,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:12:58,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:12:58,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:12:58,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:12:58,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:12:58,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:12:58,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:12:58,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 01:12:58,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:12:58,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:12:58,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:12:58,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:12:58,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:12:58,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:12:58,079 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:12:58,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:12:58,080 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:12:58,080 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:12:58,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:12:58,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:12:58,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:12:58,082 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:12:58,082 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:12:58,082 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 01:12:58,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:12:58,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:12:58,083 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:12:58,083 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:12:58,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:12:58,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:12:58,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:12:58,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:12:58,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:12:58,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:12:58,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:12:58,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:12:58,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:12:58,087 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_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af5a9640b82bb5981acfe21e6355734b41317c49 [2021-10-13 01:12:58,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:12:58,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:12:58,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:12:58,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:12:58,387 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:12:58,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2021-10-13 01:12:58,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data/96bf536d0/08d70276badb4e72b837e2cdebaf8e88/FLAG6f57bc47e [2021-10-13 01:12:59,001 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:12:59,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2021-10-13 01:12:59,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data/96bf536d0/08d70276badb4e72b837e2cdebaf8e88/FLAG6f57bc47e [2021-10-13 01:12:59,269 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data/96bf536d0/08d70276badb4e72b837e2cdebaf8e88 [2021-10-13 01:12:59,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:12:59,275 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:12:59,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:12:59,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:12:59,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:12:59,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709e1b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59, skipping insertion in model container [2021-10-13 01:12:59,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:12:59,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:12:59,762 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_b7e6f975-e544-425d-8ed7-7298fce57bf5/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2021-10-13 01:12:59,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:12:59,775 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:12:59,814 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_b7e6f975-e544-425d-8ed7-7298fce57bf5/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2021-10-13 01:12:59,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:12:59,844 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:12:59,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59 WrapperNode [2021-10-13 01:12:59,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:12:59,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:12:59,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:12:59,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:12:59,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:12:59,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:12:59,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:12:59,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:12:59,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (1/1) ... [2021-10-13 01:12:59,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:12:59,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:12:59,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:12:59,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:13:00,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:13:00,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:13:00,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:13:00,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:13:00,016 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:13:00,016 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:13:00,016 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:13:00,017 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:13:00,017 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:13:00,017 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:13:00,017 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:13:00,017 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:13:00,017 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:13:00,017 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:13:00,018 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:13:00,018 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:13:00,018 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:13:00,018 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:13:00,018 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:13:00,018 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:13:00,018 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:13:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:13:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:13:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:13:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:13:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:13:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:13:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:13:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:13:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:13:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:13:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:13:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:13:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:13:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:13:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:13:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:13:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:13:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:13:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:13:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:13:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:13:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:13:00,022 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:13:00,022 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:13:00,022 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:13:00,022 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:13:00,022 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:13:00,022 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:13:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:13:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:13:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:13:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:13:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:13:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:13:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:13:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:13:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:13:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 01:13:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:13:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:13:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:13:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:13:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:13:00,026 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:13:00,026 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:13:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:13:00,027 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:13:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:13:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:13:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:13:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:13:00,028 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:13:00,029 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:13:00,029 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:13:00,029 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:13:00,029 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:13:00,029 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:13:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:13:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:13:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:13:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:13:00,030 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:13:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:13:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:13:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:13:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:13:00,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:13:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:13:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:13:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:13:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:13:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:13:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:13:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:13:00,032 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:13:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:13:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:13:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:13:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:13:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:13:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:13:00,033 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:13:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:13:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:13:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:13:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:13:00,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:13:00,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:13:00,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:13:00,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:13:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:13:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:13:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:13:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:13:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:13:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:13:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:13:00,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:13:00,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:13:00,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:13:00,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:13:00,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:13:00,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:13:00,807 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 01:13:00,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:00 BoogieIcfgContainer [2021-10-13 01:13:00,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:13:00,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:13:00,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:13:00,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:13:00,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:12:59" (1/3) ... [2021-10-13 01:13:00,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f17ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:13:00, skipping insertion in model container [2021-10-13 01:13:00,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:12:59" (2/3) ... [2021-10-13 01:13:00,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f17ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:13:00, skipping insertion in model container [2021-10-13 01:13:00,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:00" (3/3) ... [2021-10-13 01:13:00,825 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2021-10-13 01:13:00,831 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:13:00,831 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-10-13 01:13:00,874 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:13:00,880 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, mConcurrency=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 [2021-10-13 01:13:00,880 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-10-13 01:13:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 64 states have (on average 2.1875) internal successors, (140), 123 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:13:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 01:13:00,904 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:00,905 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:00,906 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:00,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1247820226, now seen corresponding path program 1 times [2021-10-13 01:13:00,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:00,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176905694] [2021-10-13 01:13:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:00,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:01,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:01,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:01,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176905694] [2021-10-13 01:13:01,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176905694] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:01,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:01,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:13:01,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353521974] [2021-10-13 01:13:01,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:13:01,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:13:01,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:01,197 INFO L87 Difference]: Start difference. First operand has 128 states, 64 states have (on average 2.1875) internal successors, (140), 123 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 01:13:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:01,517 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2021-10-13 01:13:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:13:01,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-10-13 01:13:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:01,528 INFO L225 Difference]: With dead ends: 154 [2021-10-13 01:13:01,529 INFO L226 Difference]: Without dead ends: 150 [2021-10-13 01:13:01,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-13 01:13:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2021-10-13 01:13:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 117 states have internal predecessors, (125), 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) [2021-10-13 01:13:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2021-10-13 01:13:01,577 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 7 [2021-10-13 01:13:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:01,578 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2021-10-13 01:13:01,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 01:13:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2021-10-13 01:13:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 01:13:01,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:01,579 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:01,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:13:01,580 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1247820225, now seen corresponding path program 1 times [2021-10-13 01:13:01,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:01,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809890858] [2021-10-13 01:13:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:01,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:01,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:01,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:01,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809890858] [2021-10-13 01:13:01,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809890858] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:01,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:01,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:13:01,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816680964] [2021-10-13 01:13:01,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:13:01,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:13:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:01,677 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 01:13:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:01,957 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-10-13 01:13:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:13:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-10-13 01:13:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:01,959 INFO L225 Difference]: With dead ends: 147 [2021-10-13 01:13:01,960 INFO L226 Difference]: Without dead ends: 147 [2021-10-13 01:13:01,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:01,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-13 01:13:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2021-10-13 01:13:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.967741935483871) internal successors, (122), 114 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2021-10-13 01:13:01,987 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 7 [2021-10-13 01:13:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:01,988 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2021-10-13 01:13:01,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 01:13:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2021-10-13 01:13:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 01:13:01,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:01,989 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:01,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:13:01,989 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2044142232, now seen corresponding path program 1 times [2021-10-13 01:13:01,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:01,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058964682] [2021-10-13 01:13:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:01,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:02,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:02,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:02,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058964682] [2021-10-13 01:13:02,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058964682] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:02,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:02,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:13:02,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404150648] [2021-10-13 01:13:02,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:13:02,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:13:02,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:13:02,246 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 01:13:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:02,728 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2021-10-13 01:13:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:13:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-13 01:13:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:02,731 INFO L225 Difference]: With dead ends: 200 [2021-10-13 01:13:02,731 INFO L226 Difference]: Without dead ends: 200 [2021-10-13 01:13:02,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-13 01:13:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2021-10-13 01:13:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 102 states have (on average 1.9215686274509804) internal successors, (196), 151 states have internal predecessors, (196), 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) [2021-10-13 01:13:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2021-10-13 01:13:02,744 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 13 [2021-10-13 01:13:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:02,744 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2021-10-13 01:13:02,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 01:13:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2021-10-13 01:13:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 01:13:02,745 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:02,745 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:02,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:13:02,746 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:02,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:02,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2044142233, now seen corresponding path program 1 times [2021-10-13 01:13:02,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:02,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698175261] [2021-10-13 01:13:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:02,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:02,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:02,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:02,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698175261] [2021-10-13 01:13:02,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698175261] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:02,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:02,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:13:02,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793641455] [2021-10-13 01:13:02,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:13:02,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:02,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:13:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:13:02,846 INFO L87 Difference]: Start difference. First operand 155 states and 199 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 01:13:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:03,060 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2021-10-13 01:13:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:13:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-13 01:13:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:03,065 INFO L225 Difference]: With dead ends: 153 [2021-10-13 01:13:03,065 INFO L226 Difference]: Without dead ends: 153 [2021-10-13 01:13:03,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-13 01:13:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 146. [2021-10-13 01:13:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 109 states have (on average 1.6055045871559632) internal successors, (175), 142 states have internal predecessors, (175), 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) [2021-10-13 01:13:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2021-10-13 01:13:03,082 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 13 [2021-10-13 01:13:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:03,083 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2021-10-13 01:13:03,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-13 01:13:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2021-10-13 01:13:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 01:13:03,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:03,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:03,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 01:13:03,085 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1300029695, now seen corresponding path program 1 times [2021-10-13 01:13:03,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:03,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690851856] [2021-10-13 01:13:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:03,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:03,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:03,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690851856] [2021-10-13 01:13:03,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690851856] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:03,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:03,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:13:03,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445580226] [2021-10-13 01:13:03,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:13:03,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:13:03,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:03,178 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-13 01:13:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:03,405 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2021-10-13 01:13:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:13:03,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-10-13 01:13:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:03,408 INFO L225 Difference]: With dead ends: 145 [2021-10-13 01:13:03,408 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 01:13:03,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:13:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 01:13:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-13 01:13:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 109 states have (on average 1.5871559633027523) internal successors, (173), 141 states have internal predecessors, (173), 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) [2021-10-13 01:13:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 176 transitions. [2021-10-13 01:13:03,415 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 176 transitions. Word has length 16 [2021-10-13 01:13:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:03,415 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 176 transitions. [2021-10-13 01:13:03,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-13 01:13:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 176 transitions. [2021-10-13 01:13:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 01:13:03,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:03,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:03,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 01:13:03,417 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1300029696, now seen corresponding path program 1 times [2021-10-13 01:13:03,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:03,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966069469] [2021-10-13 01:13:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:03,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:03,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:03,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966069469] [2021-10-13 01:13:03,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966069469] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:03,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:03,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:13:03,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331889431] [2021-10-13 01:13:03,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:13:03,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:13:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:03,546 INFO L87 Difference]: Start difference. First operand 145 states and 176 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-13 01:13:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:03,793 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2021-10-13 01:13:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:13:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-10-13 01:13:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:03,795 INFO L225 Difference]: With dead ends: 144 [2021-10-13 01:13:03,795 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 01:13:03,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:13:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 01:13:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-13 01:13:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 109 states have (on average 1.5688073394495412) internal successors, (171), 140 states have internal predecessors, (171), 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) [2021-10-13 01:13:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 174 transitions. [2021-10-13 01:13:03,801 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 174 transitions. Word has length 16 [2021-10-13 01:13:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:03,802 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 174 transitions. [2021-10-13 01:13:03,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-13 01:13:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 174 transitions. [2021-10-13 01:13:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 01:13:03,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:03,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:03,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 01:13:03,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:03,804 INFO L82 PathProgramCache]: Analyzing trace with hash -573429058, now seen corresponding path program 1 times [2021-10-13 01:13:03,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:03,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408315366] [2021-10-13 01:13:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:03,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:03,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:03,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408315366] [2021-10-13 01:13:03,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408315366] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:03,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:03,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 01:13:03,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220459602] [2021-10-13 01:13:03,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:13:03,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:03,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:13:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:03,906 INFO L87 Difference]: Start difference. First operand 144 states and 174 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-10-13 01:13:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:04,140 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2021-10-13 01:13:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:13:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 20 [2021-10-13 01:13:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:04,142 INFO L225 Difference]: With dead ends: 152 [2021-10-13 01:13:04,142 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 01:13:04,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:13:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 01:13:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-10-13 01:13:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 113 states have (on average 1.5575221238938053) internal successors, (176), 144 states have internal predecessors, (176), 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) [2021-10-13 01:13:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2021-10-13 01:13:04,147 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 20 [2021-10-13 01:13:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:04,147 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2021-10-13 01:13:04,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-10-13 01:13:04,147 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2021-10-13 01:13:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 01:13:04,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:04,148 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:04,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 01:13:04,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr43REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:04,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1184218310, now seen corresponding path program 1 times [2021-10-13 01:13:04,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:04,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729882638] [2021-10-13 01:13:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:04,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:04,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:04,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729882638] [2021-10-13 01:13:04,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729882638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:04,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:04,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:13:04,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189748833] [2021-10-13 01:13:04,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:13:04,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:13:04,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:13:04,245 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-10-13 01:13:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:04,496 INFO L93 Difference]: Finished difference Result 172 states and 197 transitions. [2021-10-13 01:13:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:13:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 20 [2021-10-13 01:13:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:04,498 INFO L225 Difference]: With dead ends: 172 [2021-10-13 01:13:04,498 INFO L226 Difference]: Without dead ends: 172 [2021-10-13 01:13:04,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-13 01:13:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 132. [2021-10-13 01:13:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 97 states have (on average 1.5051546391752577) internal successors, (146), 128 states have internal predecessors, (146), 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) [2021-10-13 01:13:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2021-10-13 01:13:04,504 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 20 [2021-10-13 01:13:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:04,504 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2021-10-13 01:13:04,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-10-13 01:13:04,504 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2021-10-13 01:13:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 01:13:04,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:04,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:04,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 01:13:04,506 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:04,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1843724223, now seen corresponding path program 1 times [2021-10-13 01:13:04,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:04,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306482716] [2021-10-13 01:13:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:04,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:04,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:04,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306482716] [2021-10-13 01:13:04,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306482716] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:04,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:04,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 01:13:04,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281089800] [2021-10-13 01:13:04,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:13:04,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:04,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:13:04,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:13:04,638 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2021-10-13 01:13:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:05,105 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2021-10-13 01:13:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:13:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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 20 [2021-10-13 01:13:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:05,107 INFO L225 Difference]: With dead ends: 136 [2021-10-13 01:13:05,107 INFO L226 Difference]: Without dead ends: 136 [2021-10-13 01:13:05,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-13 01:13:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-13 01:13:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2021-10-13 01:13:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.4948453608247423) internal successors, (145), 127 states have internal predecessors, (145), 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) [2021-10-13 01:13:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2021-10-13 01:13:05,117 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 20 [2021-10-13 01:13:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:05,120 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2021-10-13 01:13:05,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2021-10-13 01:13:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2021-10-13 01:13:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 01:13:05,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:05,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:05,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 01:13:05,125 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1843724222, now seen corresponding path program 1 times [2021-10-13 01:13:05,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:05,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787840185] [2021-10-13 01:13:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:05,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:05,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:05,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:05,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787840185] [2021-10-13 01:13:05,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787840185] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:05,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:05,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:13:05,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262912357] [2021-10-13 01:13:05,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:13:05,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:05,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:13:05,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:13:05,362 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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) [2021-10-13 01:13:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:05,945 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2021-10-13 01:13:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 01:13:05,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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 20 [2021-10-13 01:13:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:05,947 INFO L225 Difference]: With dead ends: 132 [2021-10-13 01:13:05,947 INFO L226 Difference]: Without dead ends: 132 [2021-10-13 01:13:05,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-13 01:13:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-13 01:13:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 120. [2021-10-13 01:13:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.4725274725274726) internal successors, (134), 116 states have internal predecessors, (134), 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) [2021-10-13 01:13:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2021-10-13 01:13:05,951 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 20 [2021-10-13 01:13:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:05,951 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2021-10-13 01:13:05,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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) [2021-10-13 01:13:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2021-10-13 01:13:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 01:13:05,952 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:05,952 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:05,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 01:13:05,953 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:05,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash 904303381, now seen corresponding path program 1 times [2021-10-13 01:13:05,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:05,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114751849] [2021-10-13 01:13:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:05,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:06,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:06,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:06,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114751849] [2021-10-13 01:13:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114751849] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:06,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:06,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 01:13:06,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643177414] [2021-10-13 01:13:06,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:13:06,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:13:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:13:06,055 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:06,355 INFO L93 Difference]: Finished difference Result 186 states and 208 transitions. [2021-10-13 01:13:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:13:06,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-13 01:13:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:06,357 INFO L225 Difference]: With dead ends: 186 [2021-10-13 01:13:06,357 INFO L226 Difference]: Without dead ends: 186 [2021-10-13 01:13:06,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:13:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-13 01:13:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 133. [2021-10-13 01:13:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 129 states have internal predecessors, (151), 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) [2021-10-13 01:13:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2021-10-13 01:13:06,362 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 24 [2021-10-13 01:13:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:06,362 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2021-10-13 01:13:06,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2021-10-13 01:13:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 01:13:06,363 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:06,363 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:06,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 01:13:06,364 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:06,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1482793211, now seen corresponding path program 1 times [2021-10-13 01:13:06,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:06,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597281322] [2021-10-13 01:13:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:06,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:06,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:06,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:06,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597281322] [2021-10-13 01:13:06,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597281322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:06,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686668300] [2021-10-13 01:13:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:06,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:06,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:06,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:06,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:13:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:06,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 01:13:06,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:06,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:13:06,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:06,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 01:13:06,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:06,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 01:13:06,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:13:06,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-10-13 01:13:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:07,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686668300] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:07,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:13:07,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-13 01:13:07,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615956844] [2021-10-13 01:13:07,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:13:07,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:13:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:13:07,065 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:07,404 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2021-10-13 01:13:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:13:07,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-13 01:13:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:07,407 INFO L225 Difference]: With dead ends: 164 [2021-10-13 01:13:07,407 INFO L226 Difference]: Without dead ends: 163 [2021-10-13 01:13:07,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-10-13 01:13:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-13 01:13:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2021-10-13 01:13:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 107 states have (on average 1.439252336448598) internal successors, (154), 132 states have internal predecessors, (154), 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) [2021-10-13 01:13:07,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2021-10-13 01:13:07,412 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 24 [2021-10-13 01:13:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:07,412 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2021-10-13 01:13:07,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2021-10-13 01:13:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 01:13:07,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:07,413 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:07,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:07,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 01:13:07,638 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1279681529, now seen corresponding path program 1 times [2021-10-13 01:13:07,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:07,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95666199] [2021-10-13 01:13:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:07,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:07,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:07,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:07,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95666199] [2021-10-13 01:13:07,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95666199] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:07,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:07,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:13:07,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266735508] [2021-10-13 01:13:07,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:13:07,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:13:07,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:13:07,796 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-10-13 01:13:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:08,196 INFO L93 Difference]: Finished difference Result 165 states and 187 transitions. [2021-10-13 01:13:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:13:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 25 [2021-10-13 01:13:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:08,198 INFO L225 Difference]: With dead ends: 165 [2021-10-13 01:13:08,198 INFO L226 Difference]: Without dead ends: 165 [2021-10-13 01:13:08,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:13:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-13 01:13:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 137. [2021-10-13 01:13:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 109 states have (on average 1.4311926605504588) internal successors, (156), 133 states have internal predecessors, (156), 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) [2021-10-13 01:13:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2021-10-13 01:13:08,203 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 25 [2021-10-13 01:13:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:08,203 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2021-10-13 01:13:08,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-10-13 01:13:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2021-10-13 01:13:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 01:13:08,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:08,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:08,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 01:13:08,205 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1279681528, now seen corresponding path program 1 times [2021-10-13 01:13:08,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:08,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584281523] [2021-10-13 01:13:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:08,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:08,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:08,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:08,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584281523] [2021-10-13 01:13:08,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584281523] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:08,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:08,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:13:08,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035238778] [2021-10-13 01:13:08,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:13:08,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:08,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:13:08,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:13:08,458 INFO L87 Difference]: Start difference. First operand 137 states and 159 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-10-13 01:13:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:09,031 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2021-10-13 01:13:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:13:09,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 25 [2021-10-13 01:13:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:09,033 INFO L225 Difference]: With dead ends: 189 [2021-10-13 01:13:09,033 INFO L226 Difference]: Without dead ends: 189 [2021-10-13 01:13:09,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:13:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-13 01:13:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 139. [2021-10-13 01:13:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 111 states have (on average 1.4234234234234233) internal successors, (158), 135 states have internal predecessors, (158), 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) [2021-10-13 01:13:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2021-10-13 01:13:09,038 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 25 [2021-10-13 01:13:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:09,038 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2021-10-13 01:13:09,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-10-13 01:13:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2021-10-13 01:13:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 01:13:09,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:09,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:09,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 01:13:09,039 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1413298484, now seen corresponding path program 1 times [2021-10-13 01:13:09,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:09,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202387287] [2021-10-13 01:13:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:09,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:09,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:09,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:09,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202387287] [2021-10-13 01:13:09,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202387287] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:09,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:09,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-13 01:13:09,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801844048] [2021-10-13 01:13:09,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:13:09,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:13:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:13:09,284 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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) [2021-10-13 01:13:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:10,038 INFO L93 Difference]: Finished difference Result 206 states and 230 transitions. [2021-10-13 01:13:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:13:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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 27 [2021-10-13 01:13:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:10,046 INFO L225 Difference]: With dead ends: 206 [2021-10-13 01:13:10,046 INFO L226 Difference]: Without dead ends: 206 [2021-10-13 01:13:10,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:13:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-13 01:13:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-10-13 01:13:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 123 states have (on average 1.3902439024390243) internal successors, (171), 147 states have internal predecessors, (171), 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) [2021-10-13 01:13:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 174 transitions. [2021-10-13 01:13:10,052 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 174 transitions. Word has length 27 [2021-10-13 01:13:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:10,052 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 174 transitions. [2021-10-13 01:13:10,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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) [2021-10-13 01:13:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 174 transitions. [2021-10-13 01:13:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 01:13:10,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:10,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:10,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 01:13:10,054 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr58ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash -863408738, now seen corresponding path program 1 times [2021-10-13 01:13:10,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:10,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23598749] [2021-10-13 01:13:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:10,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:10,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:10,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:10,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23598749] [2021-10-13 01:13:10,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23598749] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:10,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:10,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:13:10,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928566718] [2021-10-13 01:13:10,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:13:10,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:13:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:13:10,111 INFO L87 Difference]: Start difference. First operand 151 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-10-13 01:13:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:10,287 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2021-10-13 01:13:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:13:10,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 28 [2021-10-13 01:13:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:10,289 INFO L225 Difference]: With dead ends: 176 [2021-10-13 01:13:10,289 INFO L226 Difference]: Without dead ends: 176 [2021-10-13 01:13:10,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-13 01:13:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2021-10-13 01:13:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 123 states have (on average 1.3821138211382114) internal successors, (170), 147 states have internal predecessors, (170), 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) [2021-10-13 01:13:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2021-10-13 01:13:10,296 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 28 [2021-10-13 01:13:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:10,297 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2021-10-13 01:13:10,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-10-13 01:13:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2021-10-13 01:13:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:13:10,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:10,298 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:10,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 01:13:10,298 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:10,300 INFO L82 PathProgramCache]: Analyzing trace with hash 481410755, now seen corresponding path program 1 times [2021-10-13 01:13:10,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:10,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51404542] [2021-10-13 01:13:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:10,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:10,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:10,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51404542] [2021-10-13 01:13:10,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51404542] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:10,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:10,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 01:13:10,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330820422] [2021-10-13 01:13:10,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:13:10,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:10,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:13:10,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:13:10,463 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-13 01:13:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:10,811 INFO L93 Difference]: Finished difference Result 211 states and 233 transitions. [2021-10-13 01:13:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:13:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 29 [2021-10-13 01:13:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:10,813 INFO L225 Difference]: With dead ends: 211 [2021-10-13 01:13:10,814 INFO L226 Difference]: Without dead ends: 211 [2021-10-13 01:13:10,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:13:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-13 01:13:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 155. [2021-10-13 01:13:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 127 states have (on average 1.3700787401574803) internal successors, (174), 151 states have internal predecessors, (174), 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) [2021-10-13 01:13:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 177 transitions. [2021-10-13 01:13:10,819 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 177 transitions. Word has length 29 [2021-10-13 01:13:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:10,819 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 177 transitions. [2021-10-13 01:13:10,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-13 01:13:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 177 transitions. [2021-10-13 01:13:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 01:13:10,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:10,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:10,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 01:13:10,820 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:10,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2037200703, now seen corresponding path program 1 times [2021-10-13 01:13:10,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:10,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474611425] [2021-10-13 01:13:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:10,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:11,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:11,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:11,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474611425] [2021-10-13 01:13:11,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474611425] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:11,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:11,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-13 01:13:11,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394260652] [2021-10-13 01:13:11,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:13:11,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:13:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:13:11,017 INFO L87 Difference]: Start difference. First operand 155 states and 177 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (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) [2021-10-13 01:13:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:11,475 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2021-10-13 01:13:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 01:13:11,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (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 30 [2021-10-13 01:13:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:11,477 INFO L225 Difference]: With dead ends: 192 [2021-10-13 01:13:11,477 INFO L226 Difference]: Without dead ends: 192 [2021-10-13 01:13:11,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-10-13 01:13:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-13 01:13:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 161. [2021-10-13 01:13:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 133 states have (on average 1.3533834586466165) internal successors, (180), 157 states have internal predecessors, (180), 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) [2021-10-13 01:13:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2021-10-13 01:13:11,483 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 30 [2021-10-13 01:13:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:11,483 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2021-10-13 01:13:11,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (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) [2021-10-13 01:13:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2021-10-13 01:13:11,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 01:13:11,485 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:11,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:11,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 01:13:11,486 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash -805654302, now seen corresponding path program 1 times [2021-10-13 01:13:11,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:11,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210488136] [2021-10-13 01:13:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:11,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:11,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:11,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:11,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210488136] [2021-10-13 01:13:11,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210488136] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:11,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:11,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:13:11,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121832288] [2021-10-13 01:13:11,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:13:11,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:11,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:13:11,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:13:11,589 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-10-13 01:13:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:11,944 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2021-10-13 01:13:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:13:11,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 30 [2021-10-13 01:13:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:11,946 INFO L225 Difference]: With dead ends: 210 [2021-10-13 01:13:11,946 INFO L226 Difference]: Without dead ends: 210 [2021-10-13 01:13:11,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:13:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-13 01:13:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 161. [2021-10-13 01:13:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 133 states have (on average 1.3383458646616542) internal successors, (178), 157 states have internal predecessors, (178), 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) [2021-10-13 01:13:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2021-10-13 01:13:11,952 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 30 [2021-10-13 01:13:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:11,952 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2021-10-13 01:13:11,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-10-13 01:13:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2021-10-13 01:13:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 01:13:11,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:11,953 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:11,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 01:13:11,954 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 7443348, now seen corresponding path program 1 times [2021-10-13 01:13:11,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:11,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70084219] [2021-10-13 01:13:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:11,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:12,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:12,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:12,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70084219] [2021-10-13 01:13:12,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70084219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:12,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312291817] [2021-10-13 01:13:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:12,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:12,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:12,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:12,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:13:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 01:13:12,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:12,363 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 [2021-10-13 01:13:12,397 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 [2021-10-13 01:13:12,401 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 [2021-10-13 01:13:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 01:13:12,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 01:13:12,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:13:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:13:12,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:13:12,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:13:12,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:13:12,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:13:12,824 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:13:12,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 57 [2021-10-13 01:13:12,839 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 01:13:12,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 66 [2021-10-13 01:13:12,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:13:12,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,919 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-13 01:13:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 91 [2021-10-13 01:13:12,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:13:12,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:12,936 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:13:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 74 [2021-10-13 01:13:13,646 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-10-13 01:13:13,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 66 [2021-10-13 01:13:13,666 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-13 01:13:13,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 33 [2021-10-13 01:13:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:13,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312291817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:13,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:13,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-10-13 01:13:13,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5118176] [2021-10-13 01:13:13,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 01:13:13,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:13,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 01:13:13,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:13:13,687 INFO L87 Difference]: Start difference. First operand 161 states and 181 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:14,789 INFO L93 Difference]: Finished difference Result 192 states and 213 transitions. [2021-10-13 01:13:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 01:13:14,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-10-13 01:13:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:14,790 INFO L225 Difference]: With dead ends: 192 [2021-10-13 01:13:14,790 INFO L226 Difference]: Without dead ends: 192 [2021-10-13 01:13:14,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 827.1ms TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 01:13:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-13 01:13:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 163. [2021-10-13 01:13:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 135 states have (on average 1.3333333333333333) internal successors, (180), 159 states have internal predecessors, (180), 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) [2021-10-13 01:13:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2021-10-13 01:13:14,796 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 30 [2021-10-13 01:13:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:14,797 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2021-10-13 01:13:14,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2021-10-13 01:13:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 01:13:14,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:14,798 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:14,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:15,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:15,022 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:15,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:15,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1361308933, now seen corresponding path program 1 times [2021-10-13 01:13:15,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:15,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924371036] [2021-10-13 01:13:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:15,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:15,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:15,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924371036] [2021-10-13 01:13:15,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924371036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:15,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776994262] [2021-10-13 01:13:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:15,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:15,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:15,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:15,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:13:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:15,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 01:13:15,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:15,485 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 [2021-10-13 01:13:15,606 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:13:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-13 01:13:15,663 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 21 treesize of output 17 [2021-10-13 01:13:15,795 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:13:15,795 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 01:13:16,034 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-13 01:13:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2021-10-13 01:13:16,126 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:13:16,126 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 01:13:16,368 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:13:16,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-10-13 01:13:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:16,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776994262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:16,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:16,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-13 01:13:16,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203057467] [2021-10-13 01:13:16,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 01:13:16,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:16,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 01:13:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:13:16,442 INFO L87 Difference]: Start difference. First operand 163 states and 183 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:17,929 INFO L93 Difference]: Finished difference Result 249 states and 276 transitions. [2021-10-13 01:13:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 01:13:17,929 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-10-13 01:13:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:17,931 INFO L225 Difference]: With dead ends: 249 [2021-10-13 01:13:17,931 INFO L226 Difference]: Without dead ends: 249 [2021-10-13 01:13:17,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 914.6ms TimeCoverageRelationStatistics Valid=488, Invalid=1962, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 01:13:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-10-13 01:13:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2021-10-13 01:13:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 178 states have internal predecessors, (204), 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) [2021-10-13 01:13:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2021-10-13 01:13:17,938 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 31 [2021-10-13 01:13:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:17,938 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2021-10-13 01:13:17,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2021-10-13 01:13:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 01:13:17,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:17,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:17,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:18,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-13 01:13:18,154 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1361308932, now seen corresponding path program 1 times [2021-10-13 01:13:18,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:18,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692176301] [2021-10-13 01:13:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:18,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:18,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:18,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:18,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692176301] [2021-10-13 01:13:18,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692176301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:18,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765526769] [2021-10-13 01:13:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:18,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:18,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:18,430 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:18,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:13:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 01:13:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:18,692 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 [2021-10-13 01:13:18,838 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 [2021-10-13 01:13:18,849 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:13:18,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:13:18,904 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 [2021-10-13 01:13:18,914 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 21 treesize of output 17 [2021-10-13 01:13:19,094 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:13:19,095 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-13 01:13:19,110 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 01:13:19,110 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 59 treesize of output 54 [2021-10-13 01:13:19,427 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-13 01:13:19,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 83 [2021-10-13 01:13:19,456 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-10-13 01:13:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 79 [2021-10-13 01:13:19,549 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:13:19,550 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 51 [2021-10-13 01:13:19,565 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 01:13:19,566 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 61 treesize of output 56 [2021-10-13 01:13:19,993 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:13:19,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 46 [2021-10-13 01:13:20,005 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:13:20,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2021-10-13 01:13:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:20,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765526769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:20,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:20,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 01:13:20,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735409987] [2021-10-13 01:13:20,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 01:13:20,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:20,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 01:13:20,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-10-13 01:13:20,024 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:21,620 INFO L93 Difference]: Finished difference Result 272 states and 302 transitions. [2021-10-13 01:13:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 01:13:21,621 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-10-13 01:13:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:21,622 INFO L225 Difference]: With dead ends: 272 [2021-10-13 01:13:21,622 INFO L226 Difference]: Without dead ends: 272 [2021-10-13 01:13:21,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1057.0ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 01:13:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-13 01:13:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 197. [2021-10-13 01:13:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 169 states have (on average 1.3076923076923077) internal successors, (221), 193 states have internal predecessors, (221), 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) [2021-10-13 01:13:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 224 transitions. [2021-10-13 01:13:21,629 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 224 transitions. Word has length 31 [2021-10-13 01:13:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:21,630 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 224 transitions. [2021-10-13 01:13:21,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 224 transitions. [2021-10-13 01:13:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 01:13:21,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:21,631 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:21,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:21,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:21,854 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:21,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:21,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2132846422, now seen corresponding path program 1 times [2021-10-13 01:13:21,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:21,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610991338] [2021-10-13 01:13:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:21,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:21,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:21,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:21,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610991338] [2021-10-13 01:13:21,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610991338] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:21,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:21,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:13:21,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190859502] [2021-10-13 01:13:21,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:13:21,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:13:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:13:21,921 INFO L87 Difference]: Start difference. First operand 197 states and 224 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2021-10-13 01:13:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:22,113 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2021-10-13 01:13:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:13:22,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 35 [2021-10-13 01:13:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:22,115 INFO L225 Difference]: With dead ends: 211 [2021-10-13 01:13:22,115 INFO L226 Difference]: Without dead ends: 211 [2021-10-13 01:13:22,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-13 01:13:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 198. [2021-10-13 01:13:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 170 states have (on average 1.3058823529411765) internal successors, (222), 194 states have internal predecessors, (222), 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) [2021-10-13 01:13:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 225 transitions. [2021-10-13 01:13:22,122 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 225 transitions. Word has length 35 [2021-10-13 01:13:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:22,123 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 225 transitions. [2021-10-13 01:13:22,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2021-10-13 01:13:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 225 transitions. [2021-10-13 01:13:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 01:13:22,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:22,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:22,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-13 01:13:22,125 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash -333889866, now seen corresponding path program 1 times [2021-10-13 01:13:22,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:22,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897573979] [2021-10-13 01:13:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:22,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:22,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:22,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897573979] [2021-10-13 01:13:22,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897573979] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069960508] [2021-10-13 01:13:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:22,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:22,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:22,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:22,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:13:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 01:13:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:22,669 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 [2021-10-13 01:13:22,794 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:13:22,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-13 01:13:22,850 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 21 treesize of output 17 [2021-10-13 01:13:23,005 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:13:23,005 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 01:13:23,245 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-13 01:13:23,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2021-10-13 01:13:23,310 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:13:23,311 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 01:13:23,537 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:13:23,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-10-13 01:13:23,605 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-13 01:13:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-10-13 01:13:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:23,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069960508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:23,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:23,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-13 01:13:23,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483706403] [2021-10-13 01:13:23,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 01:13:23,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 01:13:23,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:13:23,868 INFO L87 Difference]: Start difference. First operand 198 states and 225 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:29,594 INFO L93 Difference]: Finished difference Result 364 states and 405 transitions. [2021-10-13 01:13:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 01:13:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-13 01:13:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:29,597 INFO L225 Difference]: With dead ends: 364 [2021-10-13 01:13:29,597 INFO L226 Difference]: Without dead ends: 364 [2021-10-13 01:13:29,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1989.4ms TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 01:13:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-13 01:13:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 205. [2021-10-13 01:13:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 178 states have (on average 1.297752808988764) internal successors, (231), 201 states have internal predecessors, (231), 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) [2021-10-13 01:13:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 234 transitions. [2021-10-13 01:13:29,605 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 234 transitions. Word has length 36 [2021-10-13 01:13:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:29,606 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 234 transitions. [2021-10-13 01:13:29,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 234 transitions. [2021-10-13 01:13:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 01:13:29,607 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:29,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:29,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 01:13:29,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:29,818 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:29,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:29,818 INFO L82 PathProgramCache]: Analyzing trace with hash -333889865, now seen corresponding path program 1 times [2021-10-13 01:13:29,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:29,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464164183] [2021-10-13 01:13:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:29,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:30,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:30,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:30,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464164183] [2021-10-13 01:13:30,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464164183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:30,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374356545] [2021-10-13 01:13:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:30,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:30,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:30,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:30,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:13:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-13 01:13:30,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:30,428 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 [2021-10-13 01:13:30,545 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:13:30,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-13 01:13:30,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-10-13 01:13:30,609 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 26 treesize of output 22 [2021-10-13 01:13:30,622 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 [2021-10-13 01:13:30,781 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:13:30,782 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 54 [2021-10-13 01:13:30,801 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 01:13:30,802 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 68 treesize of output 63 [2021-10-13 01:13:31,139 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-13 01:13:31,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 81 [2021-10-13 01:13:31,166 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-13 01:13:31,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 65 [2021-10-13 01:13:31,257 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:13:31,261 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2021-10-13 01:13:31,273 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 01:13:31,273 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 64 treesize of output 59 [2021-10-13 01:13:31,693 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:13:31,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 50 [2021-10-13 01:13:31,698 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:13:31,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-10-13 01:13:31,768 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:13:31,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 treesize of output 33 [2021-10-13 01:13:31,780 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 01:13:31,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 01:13:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:31,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374356545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:31,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:31,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-13 01:13:31,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897875939] [2021-10-13 01:13:31,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 01:13:31,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 01:13:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:13:31,906 INFO L87 Difference]: Start difference. First operand 205 states and 234 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:33,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:33,870 INFO L93 Difference]: Finished difference Result 341 states and 379 transitions. [2021-10-13 01:13:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 01:13:33,871 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-13 01:13:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:33,873 INFO L225 Difference]: With dead ends: 341 [2021-10-13 01:13:33,874 INFO L226 Difference]: Without dead ends: 341 [2021-10-13 01:13:33,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1155.4ms TimeCoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 01:13:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-10-13 01:13:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 208. [2021-10-13 01:13:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.287292817679558) internal successors, (233), 204 states have internal predecessors, (233), 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) [2021-10-13 01:13:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 236 transitions. [2021-10-13 01:13:33,882 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 236 transitions. Word has length 36 [2021-10-13 01:13:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:33,883 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 236 transitions. [2021-10-13 01:13:33,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 236 transitions. [2021-10-13 01:13:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 01:13:33,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:33,884 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:33,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:34,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 01:13:34,098 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:34,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1592225079, now seen corresponding path program 2 times [2021-10-13 01:13:34,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:34,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936739460] [2021-10-13 01:13:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:34,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:34,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:34,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:34,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936739460] [2021-10-13 01:13:34,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936739460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:34,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540523954] [2021-10-13 01:13:34,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:13:34,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:34,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:34,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:34,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:13:34,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:13:34,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:13:34,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 01:13:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:34,987 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 [2021-10-13 01:13:35,095 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:13:35,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:13:35,145 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 16 treesize of output 12 [2021-10-13 01:13:35,150 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 [2021-10-13 01:13:35,307 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:13:35,308 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-13 01:13:35,320 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 01:13:35,320 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 50 treesize of output 45 [2021-10-13 01:13:35,601 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-13 01:13:35,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 78 [2021-10-13 01:13:35,624 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-13 01:13:35,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 58 [2021-10-13 01:13:35,697 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 01:13:35,697 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 48 [2021-10-13 01:13:35,708 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 01:13:35,708 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-10-13 01:13:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:36,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540523954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:36,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:36,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-13 01:13:36,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32483367] [2021-10-13 01:13:36,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 01:13:36,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 01:13:36,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-10-13 01:13:36,107 INFO L87 Difference]: Start difference. First operand 208 states and 236 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:37,808 INFO L93 Difference]: Finished difference Result 242 states and 266 transitions. [2021-10-13 01:13:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 01:13:37,808 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-13 01:13:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:37,809 INFO L225 Difference]: With dead ends: 242 [2021-10-13 01:13:37,809 INFO L226 Difference]: Without dead ends: 242 [2021-10-13 01:13:37,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1273.3ms TimeCoverageRelationStatistics Valid=344, Invalid=2008, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 01:13:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-13 01:13:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 200. [2021-10-13 01:13:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 173 states have (on average 1.283236994219653) internal successors, (222), 196 states have internal predecessors, (222), 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) [2021-10-13 01:13:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2021-10-13 01:13:37,817 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 36 [2021-10-13 01:13:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:37,817 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2021-10-13 01:13:37,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2021-10-13 01:13:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 01:13:37,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:37,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:37,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:38,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 01:13:38,030 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash 118656232, now seen corresponding path program 1 times [2021-10-13 01:13:38,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:38,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311808141] [2021-10-13 01:13:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:38,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:38,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:38,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:38,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311808141] [2021-10-13 01:13:38,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311808141] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:38,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113057753] [2021-10-13 01:13:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:38,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:38,154 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:38,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 01:13:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 01:13:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:38,773 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 [2021-10-13 01:13:38,776 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 [2021-10-13 01:13:38,935 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 01:13:38,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 30 [2021-10-13 01:13:38,943 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 01:13:38,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-10-13 01:13:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:38,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113057753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:38,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:38,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-10-13 01:13:38,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566333389] [2021-10-13 01:13:38,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:13:38,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:13:38,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:13:38,978 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:39,707 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2021-10-13 01:13:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 01:13:39,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-10-13 01:13:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:39,708 INFO L225 Difference]: With dead ends: 266 [2021-10-13 01:13:39,709 INFO L226 Difference]: Without dead ends: 266 [2021-10-13 01:13:39,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:13:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-13 01:13:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 208. [2021-10-13 01:13:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.276243093922652) internal successors, (231), 204 states have internal predecessors, (231), 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) [2021-10-13 01:13:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2021-10-13 01:13:39,713 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 38 [2021-10-13 01:13:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:39,713 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2021-10-13 01:13:39,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:39,714 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2021-10-13 01:13:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 01:13:39,714 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:39,714 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:39,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:39,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 01:13:39,922 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash 481543229, now seen corresponding path program 1 times [2021-10-13 01:13:39,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:39,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143043848] [2021-10-13 01:13:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:39,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:40,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:40,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:40,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143043848] [2021-10-13 01:13:40,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143043848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:40,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056450785] [2021-10-13 01:13:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:40,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:40,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:40,150 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:40,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 01:13:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 01:13:40,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:40,805 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 [2021-10-13 01:13:40,835 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:13:40,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:13:40,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 01:13:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:40,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-10-13 01:13:41,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:13:41,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-10-13 01:13:41,534 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:13:41,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-10-13 01:13:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:41,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056450785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:41,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:41,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-13 01:13:41,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148801216] [2021-10-13 01:13:41,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 01:13:41,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 01:13:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-10-13 01:13:41,592 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:42,896 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2021-10-13 01:13:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 01:13:42,896 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-10-13 01:13:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:42,897 INFO L225 Difference]: With dead ends: 240 [2021-10-13 01:13:42,897 INFO L226 Difference]: Without dead ends: 240 [2021-10-13 01:13:42,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 908.1ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 01:13:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-13 01:13:42,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 222. [2021-10-13 01:13:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 195 states have (on average 1.2923076923076924) internal successors, (252), 218 states have internal predecessors, (252), 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) [2021-10-13 01:13:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 255 transitions. [2021-10-13 01:13:42,905 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 255 transitions. Word has length 38 [2021-10-13 01:13:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:42,905 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 255 transitions. [2021-10-13 01:13:42,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 255 transitions. [2021-10-13 01:13:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 01:13:42,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:42,906 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:42,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:43,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 01:13:43,121 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr54REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash 481543230, now seen corresponding path program 1 times [2021-10-13 01:13:43,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:43,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938546033] [2021-10-13 01:13:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:43,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:43,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:43,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:43,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938546033] [2021-10-13 01:13:43,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938546033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:43,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790690473] [2021-10-13 01:13:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:43,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:43,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:43,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 01:13:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 01:13:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:43,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:13:43,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:13:44,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:13:44,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 57 [2021-10-13 01:13:44,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:13:44,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2021-10-13 01:13:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:44,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790690473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:44,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:44,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-13 01:13:44,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150091166] [2021-10-13 01:13:44,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 01:13:44,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:44,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 01:13:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-10-13 01:13:44,837 INFO L87 Difference]: Start difference. First operand 222 states and 255 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:46,508 INFO L93 Difference]: Finished difference Result 267 states and 290 transitions. [2021-10-13 01:13:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 01:13:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-10-13 01:13:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:46,510 INFO L225 Difference]: With dead ends: 267 [2021-10-13 01:13:46,510 INFO L226 Difference]: Without dead ends: 267 [2021-10-13 01:13:46,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1215.3ms TimeCoverageRelationStatistics Valid=433, Invalid=2219, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 01:13:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-13 01:13:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 224. [2021-10-13 01:13:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 197 states have (on average 1.284263959390863) internal successors, (253), 220 states have internal predecessors, (253), 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) [2021-10-13 01:13:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 256 transitions. [2021-10-13 01:13:46,516 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 256 transitions. Word has length 38 [2021-10-13 01:13:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:46,517 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 256 transitions. [2021-10-13 01:13:46,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 256 transitions. [2021-10-13 01:13:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 01:13:46,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:46,518 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:46,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:46,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 01:13:46,734 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:46,734 INFO L82 PathProgramCache]: Analyzing trace with hash 535531503, now seen corresponding path program 1 times [2021-10-13 01:13:46,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:46,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104358571] [2021-10-13 01:13:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:46,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:13:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:47,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:47,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104358571] [2021-10-13 01:13:47,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104358571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:47,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757003613] [2021-10-13 01:13:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:47,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:47,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:47,218 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:47,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 01:13:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:47,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 01:13:47,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:47,808 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 [2021-10-13 01:13:47,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:13:47,910 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:13:47,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:13:47,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:47,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 01:13:47,971 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 16 treesize of output 12 [2021-10-13 01:13:48,101 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:13:48,102 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-10-13 01:13:48,112 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-13 01:13:48,112 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 62 treesize of output 34 [2021-10-13 01:13:48,216 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 01:13:48,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-10-13 01:13:48,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:48,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:13:48,335 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-13 01:13:48,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 29 [2021-10-13 01:13:48,481 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:13:48,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:13:48,578 INFO L354 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2021-10-13 01:13:48,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 46 [2021-10-13 01:13:48,665 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 [2021-10-13 01:13:48,670 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 43 treesize of output 39 [2021-10-13 01:13:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:48,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:13:48,677 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:13:48,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 01:13:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:48,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 01:13:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:48,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:48,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:13:48,744 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:13:48,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 40 [2021-10-13 01:13:48,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:48,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-10-13 01:13:48,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:13:48,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-10-13 01:13:48,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:13:48,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-10-13 01:13:49,043 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:13:49,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-13 01:13:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:49,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757003613] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:49,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:49,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-10-13 01:13:49,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53079347] [2021-10-13 01:13:49,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 01:13:49,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:49,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 01:13:49,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 01:13:49,074 INFO L87 Difference]: Start difference. First operand 224 states and 256 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:50,844 INFO L93 Difference]: Finished difference Result 289 states and 318 transitions. [2021-10-13 01:13:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 01:13:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-10-13 01:13:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:50,846 INFO L225 Difference]: With dead ends: 289 [2021-10-13 01:13:50,846 INFO L226 Difference]: Without dead ends: 289 [2021-10-13 01:13:50,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1328.5ms TimeCoverageRelationStatistics Valid=405, Invalid=3017, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 01:13:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-13 01:13:50,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 236. [2021-10-13 01:13:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 209 states have (on average 1.2679425837320575) internal successors, (265), 232 states have internal predecessors, (265), 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) [2021-10-13 01:13:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 268 transitions. [2021-10-13 01:13:50,854 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 268 transitions. Word has length 38 [2021-10-13 01:13:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:50,855 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 268 transitions. [2021-10-13 01:13:50,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 268 transitions. [2021-10-13 01:13:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 01:13:50,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:50,856 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:50,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:51,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:51,074 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr58ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:51,074 INFO L82 PathProgramCache]: Analyzing trace with hash -616625439, now seen corresponding path program 1 times [2021-10-13 01:13:51,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:51,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410301589] [2021-10-13 01:13:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:51,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:51,109 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:13:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:51,164 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:13:51,164 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:13:51,166 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr58ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:13:51,168 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 01:13:51,168 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 01:13:51,168 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 01:13:51,169 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 01:13:51,169 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 01:13:51,169 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 01:13:51,169 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-13 01:13:51,169 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 01:13:51,170 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 01:13:51,170 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-13 01:13:51,170 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-13 01:13:51,170 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-13 01:13:51,170 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-13 01:13:51,170 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-13 01:13:51,171 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-13 01:13:51,171 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-13 01:13:51,171 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-13 01:13:51,171 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-13 01:13:51,171 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-13 01:13:51,171 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-13 01:13:51,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-13 01:13:51,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-13 01:13:51,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-13 01:13:51,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-13 01:13:51,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-13 01:13:51,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-13 01:13:51,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-13 01:13:51,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-13 01:13:51,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-13 01:13:51,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-13 01:13:51,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-13 01:13:51,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-13 01:13:51,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-13 01:13:51,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-13 01:13:51,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-13 01:13:51,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-13 01:13:51,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-13 01:13:51,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-13 01:13:51,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-13 01:13:51,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-13 01:13:51,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-13 01:13:51,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-10-13 01:13:51,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-10-13 01:13:51,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-10-13 01:13:51,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44REQUIRES_VIOLATION [2021-10-13 01:13:51,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-10-13 01:13:51,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-10-13 01:13:51,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-10-13 01:13:51,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-10-13 01:13:51,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION [2021-10-13 01:13:51,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 01:13:51,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION [2021-10-13 01:13:51,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-10-13 01:13:51,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-10-13 01:13:51,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION [2021-10-13 01:13:51,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:13:51,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:13:51,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:13:51,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-13 01:13:51,187 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:13:51,216 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-13 01:13:51,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:13:51 BoogieIcfgContainer [2021-10-13 01:13:51,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:13:51,246 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:13:51,247 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:13:51,247 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:13:51,248 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:00" (3/4) ... [2021-10-13 01:13:51,251 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 01:13:51,251 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:13:51,252 INFO L168 Benchmark]: Toolchain (without parser) took 51976.96 ms. Allocated memory was 94.4 MB in the beginning and 237.0 MB in the end (delta: 142.6 MB). Free memory was 57.8 MB in the beginning and 166.7 MB in the end (delta: -108.9 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:51,252 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory was 65.7 MB in the beginning and 65.6 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:13:51,253 INFO L168 Benchmark]: CACSL2BoogieTranslator took 567.72 ms. Allocated memory is still 94.4 MB. Free memory was 57.6 MB in the beginning and 62.6 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:51,253 INFO L168 Benchmark]: Boogie Preprocessor took 90.01 ms. Allocated memory is still 94.4 MB. Free memory was 62.6 MB in the beginning and 59.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:51,253 INFO L168 Benchmark]: RCFGBuilder took 873.69 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 59.8 MB in the beginning and 85.6 MB in the end (delta: -25.8 MB). Peak memory consumption was 33.9 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:51,258 INFO L168 Benchmark]: TraceAbstraction took 50433.45 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 84.7 MB in the beginning and 166.7 MB in the end (delta: -82.0 MB). Peak memory consumption was 41.3 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:51,258 INFO L168 Benchmark]: Witness Printer took 4.63 ms. Allocated memory is still 237.0 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:13:51,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory was 65.7 MB in the beginning and 65.6 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 567.72 ms. Allocated memory is still 94.4 MB. Free memory was 57.6 MB in the beginning and 62.6 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 90.01 ms. Allocated memory is still 94.4 MB. Free memory was 62.6 MB in the beginning and 59.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 873.69 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 59.8 MB in the beginning and 85.6 MB in the end (delta: -25.8 MB). Peak memory consumption was 33.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 50433.45 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 84.7 MB in the beginning and 166.7 MB in the end (delta: -82.0 MB). Peak memory consumption was 41.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.63 ms. Allocated memory is still 237.0 MB. Free memory is still 166.7 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: 997]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 997. Possible FailurePath: [L1000] SLL* head = malloc(sizeof(SLL)); [L1001] head->next = ((void*)0) VAL [head={-2:0}] [L1002] head->prev = ((void*)0) VAL [head={-2:0}] [L1003] head->data = 0 VAL [head={-2:0}] [L1005] SLL* x = head; VAL [head={-2:0}, x={-2:0}] [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1029] x = head VAL [head={-2:0}, x={-2:0}] [L1030] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}] [L1030] COND FALSE !(x->next != ((void*)0)) [L1037] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}] [L1037] SLL* y = x->next; [L1038] x->next = malloc(sizeof(SLL)) VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}, y={0:0}] [L1039] x->data = 1 VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1040] x->next = y VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1041] COND FALSE !(y != ((void*)0)) VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1049] x = head VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1052] EXPR x->data VAL [head={-2:0}, x={-2:0}, x->data=1, y={0:0}] [L1052] COND FALSE !(x->data != 1) [L1058] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}, y={0:0}] [L1058] x = x->next [L1059] COND FALSE !(\read(*x)) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1067] x = head VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1068] COND TRUE x != ((void*)0) [L1070] head = x VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1071] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}, y={0:0}] [L1071] x = x->next [L1072] free(head) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1072] free(head) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1072] free(head) [L1068] COND FALSE !(x != ((void*)0)) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1075] return 0; VAL [\result=0, head={-2:0}, x={0:0}, y={0:0}] - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1002]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1002]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 131 locations, 59 error locations. Started 1 CEGAR loops. OverallTime: 50311.6ms, OverallIterations: 31, TraceHistogramMax: 2, EmptinessCheckTime: 34.9ms, AutomataDifference: 26394.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2066 SDtfs, 6502 SDslu, 9009 SDs, 0 SdLazy, 21948 SolverSat, 1573 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 15642.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 978 GetRequests, 333 SyntacticMatches, 23 SemanticMatches, 622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5196 ImplicationChecksByTransitivity, 13092.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred in iteration=30, InterpolantAutomatonStates: 451, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 224.8ms AutomataMinimizationTime, 30 MinimizatonAttempts, 1235 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 173.7ms SsaConstructionTime, 767.3ms SatisfiabilityAnalysisTime, 16284.0ms InterpolantComputationTime, 1196 NumberOfCodeBlocks, 1196 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1116 ConstructedInterpolants, 94 QuantifiedInterpolants, 16318 SizeOfPredicates, 143 NumberOfNonLiveVariables, 2335 ConjunctsInSsa, 409 ConjunctsInUnsatCore, 41 InterpolantComputations, 20 PerfectInterpolantSequences, 19/66 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 [2021-10-13 01:13:51,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:13:53,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:13:53,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:13:53,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:13:53,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:13:53,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:13:53,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:13:53,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:13:53,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:13:53,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:13:53,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:13:53,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:13:53,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:13:53,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:13:53,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:13:53,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:13:53,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:13:53,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:13:53,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:13:53,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:13:53,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:13:53,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:13:53,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:13:53,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:13:53,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:13:53,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:13:53,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:13:53,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:13:53,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:13:53,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:13:53,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:13:53,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:13:53,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:13:53,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:13:53,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:13:53,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:13:53,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:13:53,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:13:53,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:13:53,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:13:53,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:13:53,871 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 01:13:53,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:13:53,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:13:53,913 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:13:53,913 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:13:53,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:13:53,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:13:53,915 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:13:53,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:13:53,916 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:13:53,916 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:13:53,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:13:53,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:13:53,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:13:53,917 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:13:53,917 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:13:53,917 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 01:13:53,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:13:53,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:13:53,918 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 01:13:53,918 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 01:13:53,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:13:53,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:13:53,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:13:53,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:13:53,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:13:53,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:13:53,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:13:53,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:13:53,920 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 01:13:53,921 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 01:13:53,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:13:53,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 01:13:53,922 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_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af5a9640b82bb5981acfe21e6355734b41317c49 [2021-10-13 01:13:54,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:13:54,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:13:54,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:13:54,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:13:54,345 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:13:54,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2021-10-13 01:13:54,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data/47199ca7f/76f844d0a58146a8b9fbceb819f97fb4/FLAG639e36c6f [2021-10-13 01:13:54,932 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:13:54,933 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2021-10-13 01:13:54,958 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data/47199ca7f/76f844d0a58146a8b9fbceb819f97fb4/FLAG639e36c6f [2021-10-13 01:13:55,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/data/47199ca7f/76f844d0a58146a8b9fbceb819f97fb4 [2021-10-13 01:13:55,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:13:55,263 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:13:55,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:13:55,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:13:55,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:13:55,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c22dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55, skipping insertion in model container [2021-10-13 01:13:55,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:13:55,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:13:55,645 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_b7e6f975-e544-425d-8ed7-7298fce57bf5/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2021-10-13 01:13:55,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:13:55,664 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:13:55,701 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_b7e6f975-e544-425d-8ed7-7298fce57bf5/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2021-10-13 01:13:55,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:13:55,736 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:13:55,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55 WrapperNode [2021-10-13 01:13:55,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:13:55,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:13:55,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:13:55,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:13:55,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:13:55,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:13:55,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:13:55,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:13:55,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (1/1) ... [2021-10-13 01:13:55,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:13:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:55,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:55,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:13:55,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:13:55,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:13:55,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 01:13:55,890 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:13:55,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:13:55,890 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:13:55,892 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:13:55,893 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:13:55,893 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:13:55,893 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:13:55,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:13:55,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:13:55,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:13:55,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:13:55,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:13:55,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:13:55,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:13:55,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:13:55,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:13:55,895 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:13:55,895 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:13:55,895 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:13:55,895 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:13:55,895 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:13:55,895 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:13:55,896 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:13:55,896 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:13:55,896 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:13:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:13:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:13:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:13:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:13:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:13:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:13:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:13:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:13:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:13:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:13:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:13:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:13:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:13:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:13:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:13:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:13:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:13:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:13:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:13:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:13:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:13:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:13:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:13:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:13:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:13:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:13:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:13:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:13:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:13:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:13:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:13:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 01:13:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:13:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:13:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:13:55,905 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:13:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:13:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:13:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:13:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:13:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:13:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:13:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:13:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:13:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:13:55,908 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:13:55,908 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:13:55,908 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:13:55,908 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:13:55,908 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:13:55,908 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:13:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:13:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:13:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:13:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:13:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:13:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:13:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:13:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:13:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:13:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:13:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:13:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:13:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:13:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:13:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:13:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:13:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:13:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:13:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:13:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:13:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:13:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:13:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:13:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:13:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:13:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:13:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:13:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:13:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:13:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:13:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:13:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:13:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:13:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:13:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:13:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:13:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:13:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:13:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 01:13:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:13:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 01:13:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:13:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:13:55,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 01:13:55,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:13:55,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 01:13:55,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-13 01:13:55,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-13 01:13:56,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:13:56,824 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 01:13:56,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:56 BoogieIcfgContainer [2021-10-13 01:13:56,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:13:56,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:13:56,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:13:56,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:13:56,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:13:55" (1/3) ... [2021-10-13 01:13:56,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68470495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:13:56, skipping insertion in model container [2021-10-13 01:13:56,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:55" (2/3) ... [2021-10-13 01:13:56,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68470495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:13:56, skipping insertion in model container [2021-10-13 01:13:56,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:56" (3/3) ... [2021-10-13 01:13:56,849 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2021-10-13 01:13:56,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:13:56,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-10-13 01:13:56,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:13:56,928 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, mConcurrency=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 [2021-10-13 01:13:56,928 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-10-13 01:13:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 62 states have (on average 2.225806451612903) internal successors, (138), 121 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:13:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 01:13:56,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:56,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:56,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:56,979 INFO L82 PathProgramCache]: Analyzing trace with hash -26841262, now seen corresponding path program 1 times [2021-10-13 01:13:56,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:13:56,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401239390] [2021-10-13 01:13:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:56,993 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:13:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:13:56,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:13:57,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 01:13:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:57,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 01:13:57,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:57,263 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 [2021-10-13 01:13:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:57,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:57,316 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:13:57,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401239390] [2021-10-13 01:13:57,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401239390] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:57,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:57,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 01:13:57,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343965832] [2021-10-13 01:13:57,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:13:57,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:13:57,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:13:57,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:13:57,342 INFO L87 Difference]: Start difference. First operand has 126 states, 62 states have (on average 2.225806451612903) internal successors, (138), 121 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 01:13:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:57,742 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2021-10-13 01:13:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:13:57,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-10-13 01:13:57,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:57,757 INFO L225 Difference]: With dead ends: 152 [2021-10-13 01:13:57,758 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 01:13:57,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:13:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 01:13:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-10-13 01:13:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 60 states have (on average 2.05) internal successors, (123), 115 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:13:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2021-10-13 01:13:57,828 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 7 [2021-10-13 01:13:57,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:57,829 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2021-10-13 01:13:57,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 01:13:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2021-10-13 01:13:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 01:13:57,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:57,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:57,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 01:13:58,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:13:58,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:58,042 INFO L82 PathProgramCache]: Analyzing trace with hash -26841261, now seen corresponding path program 1 times [2021-10-13 01:13:58,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:13:58,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848825416] [2021-10-13 01:13:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:58,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:13:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:13:58,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:13:58,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 01:13:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:58,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 01:13:58,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:58,202 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 [2021-10-13 01:13:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:58,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:58,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:13:58,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848825416] [2021-10-13 01:13:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848825416] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:58,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:58,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 01:13:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898595820] [2021-10-13 01:13:58,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:13:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:13:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:13:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:58,314 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-10-13 01:13:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:58,862 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2021-10-13 01:13:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:13:58,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 7 [2021-10-13 01:13:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:58,864 INFO L225 Difference]: With dead ends: 145 [2021-10-13 01:13:58,865 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 01:13:58,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 01:13:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2021-10-13 01:13:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 60 states have (on average 2.0) internal successors, (120), 112 states have internal predecessors, (120), 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) [2021-10-13 01:13:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-10-13 01:13:58,879 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 7 [2021-10-13 01:13:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:58,880 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-10-13 01:13:58,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-10-13 01:13:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-10-13 01:13:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 01:13:58,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:58,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:58,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:59,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:13:59,090 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:13:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:59,091 INFO L82 PathProgramCache]: Analyzing trace with hash 125737015, now seen corresponding path program 1 times [2021-10-13 01:13:59,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:13:59,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924867034] [2021-10-13 01:13:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:59,092 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:13:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:13:59,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:13:59,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 01:13:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:59,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:13:59,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:59,297 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 [2021-10-13 01:13:59,364 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 01:13:59,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 26 [2021-10-13 01:13:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:59,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:59,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:13:59,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924867034] [2021-10-13 01:13:59,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924867034] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:59,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:59,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 01:13:59,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671383269] [2021-10-13 01:13:59,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:13:59,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:13:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:13:59,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:59,504 INFO L87 Difference]: Start difference. First operand 116 states and 123 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) [2021-10-13 01:13:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:59,948 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2021-10-13 01:13:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:13:59,948 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 12 [2021-10-13 01:13:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:59,950 INFO L225 Difference]: With dead ends: 116 [2021-10-13 01:13:59,950 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 01:13:59,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 10 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:13:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 01:13:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2021-10-13 01:13:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 68 states have (on average 1.7352941176470589) internal successors, (118), 104 states have internal predecessors, (118), 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) [2021-10-13 01:13:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2021-10-13 01:13:59,964 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 12 [2021-10-13 01:13:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:59,965 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2021-10-13 01:13:59,965 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) [2021-10-13 01:13:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2021-10-13 01:13:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 01:13:59,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:59,966 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:59,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:14:00,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:14:00,178 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:14:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:14:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash 125737016, now seen corresponding path program 1 times [2021-10-13 01:14:00,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:14:00,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764021322] [2021-10-13 01:14:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:14:00,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:14:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:14:00,181 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:14:00,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 01:14:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:14:00,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:14:00,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:14:00,371 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 [2021-10-13 01:14:00,486 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:14:00,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-10-13 01:14:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:00,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:14:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:00,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:14:00,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764021322] [2021-10-13 01:14:00,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764021322] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:14:00,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:14:00,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-10-13 01:14:00,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817667826] [2021-10-13 01:14:00,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:14:00,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:14:00,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:14:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:14:00,877 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:14:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:14:01,723 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-10-13 01:14:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:14:01,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-13 01:14:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:14:01,725 INFO L225 Difference]: With dead ends: 144 [2021-10-13 01:14:01,725 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 01:14:01,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:14:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 01:14:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-10-13 01:14:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 84 states have (on average 1.5357142857142858) internal successors, (129), 112 states have internal predecessors, (129), 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) [2021-10-13 01:14:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2021-10-13 01:14:01,748 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 12 [2021-10-13 01:14:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:14:01,749 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2021-10-13 01:14:01,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:14:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2021-10-13 01:14:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:14:01,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:14:01,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:14:01,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:14:01,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:14:01,966 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:14:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:14:01,967 INFO L82 PathProgramCache]: Analyzing trace with hash 619955620, now seen corresponding path program 1 times [2021-10-13 01:14:01,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:14:01,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833283807] [2021-10-13 01:14:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:14:01,967 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:14:01,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:14:01,969 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:14:02,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 01:14:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:14:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:14:02,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:14:02,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:14:02,181 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 20 treesize of output 16 [2021-10-13 01:14:02,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 01:14:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:02,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:14:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:02,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:14:02,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833283807] [2021-10-13 01:14:02,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833283807] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:14:02,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:14:02,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 01:14:02,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657143284] [2021-10-13 01:14:02,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:14:02,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:14:02,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:14:02,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:14:02,279 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:14:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:14:02,704 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2021-10-13 01:14:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:14:02,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 01:14:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:14:02,708 INFO L225 Difference]: With dead ends: 115 [2021-10-13 01:14:02,708 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 01:14:02,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:14:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 01:14:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-13 01:14:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 84 states have (on average 1.5238095238095237) internal successors, (128), 111 states have internal predecessors, (128), 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) [2021-10-13 01:14:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2021-10-13 01:14:02,733 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 15 [2021-10-13 01:14:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:14:02,733 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2021-10-13 01:14:02,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:14:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2021-10-13 01:14:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:14:02,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:14:02,735 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:14:02,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:14:02,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:14:02,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:14:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:14:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash 619955621, now seen corresponding path program 1 times [2021-10-13 01:14:02,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:14:02,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613365955] [2021-10-13 01:14:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:14:02,948 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:14:02,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:14:02,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:14:02,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 01:14:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:14:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:14:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:14:03,155 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 [2021-10-13 01:14:03,181 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 17 treesize of output 13 [2021-10-13 01:14:03,188 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 [2021-10-13 01:14:03,235 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 31 treesize of output 23 [2021-10-13 01:14:03,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-13 01:14:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:03,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:14:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:03,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:14:03,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613365955] [2021-10-13 01:14:03,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613365955] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:14:03,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:14:03,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 01:14:03,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533777153] [2021-10-13 01:14:03,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:14:03,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:14:03,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:14:03,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:14:03,492 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-10-13 01:14:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:14:04,600 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2021-10-13 01:14:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:14:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 01:14:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:14:04,602 INFO L225 Difference]: With dead ends: 114 [2021-10-13 01:14:04,602 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 01:14:04,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:14:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 01:14:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-13 01:14:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 110 states have internal predecessors, (127), 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) [2021-10-13 01:14:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-10-13 01:14:04,609 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 15 [2021-10-13 01:14:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:14:04,609 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-10-13 01:14:04,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-10-13 01:14:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-10-13 01:14:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:14:04,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:14:04,611 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:14:04,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 01:14:04,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:14:04,824 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:14:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:14:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2102405272, now seen corresponding path program 1 times [2021-10-13 01:14:04,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:14:04,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164323417] [2021-10-13 01:14:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:14:04,826 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:14:04,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:14:04,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:14:04,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 01:14:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:14:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 01:14:04,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:14:04,997 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 [2021-10-13 01:14:05,003 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 [2021-10-13 01:14:05,052 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 01:14:05,053 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 21 treesize of output 20 [2021-10-13 01:14:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:14:05,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 01:14:05,159 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 01:14:05,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:14:05,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:14:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:14:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:14:05,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:14:05,324 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 01:14:05,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-10-13 01:14:05,331 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 01:14:05,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-10-13 01:14:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:05,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:14:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:05,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:14:05,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164323417] [2021-10-13 01:14:05,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164323417] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:14:05,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:14:05,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 7 [2021-10-13 01:14:05,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731473595] [2021-10-13 01:14:05,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:14:05,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:14:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:14:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:14:05,526 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:14:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:14:06,025 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2021-10-13 01:14:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:14:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-13 01:14:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:14:06,027 INFO L225 Difference]: With dead ends: 121 [2021-10-13 01:14:06,027 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 01:14:06,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:14:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 01:14:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2021-10-13 01:14:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.5057471264367817) internal successors, (131), 113 states have internal predecessors, (131), 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) [2021-10-13 01:14:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-10-13 01:14:06,033 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 18 [2021-10-13 01:14:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:14:06,034 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-10-13 01:14:06,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:14:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-10-13 01:14:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 01:14:06,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:14:06,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:14:06,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:14:06,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:14:06,242 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:14:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:14:06,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1419700134, now seen corresponding path program 1 times [2021-10-13 01:14:06,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:14:06,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821808239] [2021-10-13 01:14:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:14:06,243 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:14:06,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:14:06,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:14:06,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 01:14:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:14:06,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 01:14:06,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:14:06,493 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 [2021-10-13 01:14:06,553 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 01:14:06,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-13 01:14:06,627 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 24 treesize of output 20 [2021-10-13 01:14:06,804 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:14:06,805 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-13 01:14:06,916 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 01:14:06,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 44 [2021-10-13 01:14:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:07,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:14:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:16,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:14:16,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821808239] [2021-10-13 01:14:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821808239] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:14:16,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:14:16,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 6] imperfect sequences [] total 13 [2021-10-13 01:14:16,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480065120] [2021-10-13 01:14:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 01:14:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:14:16,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 01:14:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=134, Unknown=3, NotChecked=0, Total=182 [2021-10-13 01:14:16,664 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 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) [2021-10-13 01:14:24,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:14:24,816 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2021-10-13 01:14:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 01:14:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 01:14:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:14:24,819 INFO L225 Difference]: With dead ends: 127 [2021-10-13 01:14:24,819 INFO L226 Difference]: Without dead ends: 127 [2021-10-13 01:14:24,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 10174.5ms TimeCoverageRelationStatistics Valid=157, Invalid=392, Unknown=3, NotChecked=0, Total=552 [2021-10-13 01:14:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-13 01:14:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2021-10-13 01:14:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 87 states have (on average 1.4942528735632183) internal successors, (130), 112 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:14:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2021-10-13 01:14:24,824 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 19 [2021-10-13 01:14:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:14:24,825 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2021-10-13 01:14:24,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 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) [2021-10-13 01:14:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2021-10-13 01:14:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 01:14:24,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:14:24,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:14:24,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:14:25,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:14:25,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:14:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:14:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1419700135, now seen corresponding path program 1 times [2021-10-13 01:14:25,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:14:25,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054155801] [2021-10-13 01:14:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:14:25,028 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:14:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:14:25,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:14:25,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 01:14:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:14:25,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 01:14:25,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:14:25,301 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 [2021-10-13 01:14:25,368 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:14:25,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 01:14:25,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-10-13 01:14:25,427 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 21 treesize of output 17 [2021-10-13 01:14:25,440 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 [2021-10-13 01:14:25,588 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:14:25,589 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-13 01:14:25,612 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 01:14:25,613 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 59 treesize of output 54 [2021-10-13 01:14:25,738 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 01:14:25,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-10-13 01:14:25,746 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 01:14:25,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-10-13 01:14:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:25,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:14:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:14:38,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:14:38,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054155801] [2021-10-13 01:14:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054155801] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:14:38,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:14:38,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-10-13 01:14:38,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462247154] [2021-10-13 01:14:38,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 01:14:38,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:14:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 01:14:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=194, Unknown=3, NotChecked=0, Total=240 [2021-10-13 01:14:38,206 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2021-10-13 01:14:51,602 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (and (not (= .cse0 c_main_~x~0.base)) (= (select |c_#length| .cse0) (_ bv12 32)) (= c_main_~x~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~x~0.base) c_main_~x~0.offset) (_ bv0 32)) (= (select |c_#length| c_main_~x~0.base) (_ bv12 32)) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse1 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) .cse1 c_main_~x~0.offset)) c_main_~x~0.base) c_main_~x~0.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) .cse1 c_main_~x~0.base)) c_main_~x~0.base) c_main_~x~0.offset))))) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~x~0.offset)) c_main_~x~0.base) c_main_~x~0.offset))) (bvule (bvadd (_ bv8 32) .cse2) (bvadd .cse2 (_ bv12 32))))) (exists ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset)) (.cse4 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) c_main_~x~0.offset) (= c_main_~x~0.base (select (select |c_#memory_$Pointer$.base| .cse3) .cse4))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~head~0.base))))) (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~x~0.base)))))) (_ bv1 1))))) is different from false [2021-10-13 01:15:21,259 WARN L207 SmtUtils]: Spent 8.72 s on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-10-13 01:15:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:21,575 INFO L93 Difference]: Finished difference Result 208 states and 238 transitions. [2021-10-13 01:15:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 01:15:21,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 01:15:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:21,577 INFO L225 Difference]: With dead ends: 208 [2021-10-13 01:15:21,577 INFO L226 Difference]: Without dead ends: 208 [2021-10-13 01:15:21,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 52894.3ms TimeCoverageRelationStatistics Valid=360, Invalid=1272, Unknown=12, NotChecked=78, Total=1722 [2021-10-13 01:15:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-13 01:15:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 112. [2021-10-13 01:15:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 108 states have internal predecessors, (126), 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) [2021-10-13 01:15:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2021-10-13 01:15:21,584 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 19 [2021-10-13 01:15:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:21,584 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2021-10-13 01:15:21,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2021-10-13 01:15:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2021-10-13 01:15:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:15:21,585 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:21,585 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:21,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:21,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:15:21,786 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:15:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash -937860754, now seen corresponding path program 1 times [2021-10-13 01:15:21,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:15:21,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504713191] [2021-10-13 01:15:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:21,787 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:15:21,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:15:21,788 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:15:21,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 01:15:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 01:15:22,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:22,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 01:15:22,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-13 01:15:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:22,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:15:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:22,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:15:22,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504713191] [2021-10-13 01:15:22,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504713191] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:22,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:22,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-13 01:15:22,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109829199] [2021-10-13 01:15:22,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:15:22,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:15:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:15:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:15:22,354 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:23,197 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2021-10-13 01:15:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:15:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-13 01:15:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:23,199 INFO L225 Difference]: With dead ends: 176 [2021-10-13 01:15:23,199 INFO L226 Difference]: Without dead ends: 176 [2021-10-13 01:15:23,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:15:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-13 01:15:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 124. [2021-10-13 01:15:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 98 states have (on average 1.4285714285714286) internal successors, (140), 120 states have internal predecessors, (140), 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) [2021-10-13 01:15:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2021-10-13 01:15:23,204 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 22 [2021-10-13 01:15:23,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:23,205 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2021-10-13 01:15:23,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:15:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2021-10-13 01:15:23,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:15:23,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:23,211 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:23,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:23,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:15:23,423 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:15:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:23,425 INFO L82 PathProgramCache]: Analyzing trace with hash -359370924, now seen corresponding path program 1 times [2021-10-13 01:15:23,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:15:23,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898938959] [2021-10-13 01:15:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:23,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:15:23,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:15:23,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:15:23,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 01:15:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 01:15:23,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:23,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:15:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 01:15:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:23,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 01:15:23,915 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 [2021-10-13 01:15:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:23,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:15:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:24,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:15:24,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898938959] [2021-10-13 01:15:24,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898938959] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:24,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:24,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-10-13 01:15:24,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279184191] [2021-10-13 01:15:24,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:15:24,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:15:24,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:15:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:15:24,103 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-13 01:15:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:24,957 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-10-13 01:15:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 01:15:24,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 22 [2021-10-13 01:15:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:24,960 INFO L225 Difference]: With dead ends: 155 [2021-10-13 01:15:24,960 INFO L226 Difference]: Without dead ends: 155 [2021-10-13 01:15:24,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:15:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-13 01:15:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 127. [2021-10-13 01:15:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.4158415841584158) internal successors, (143), 123 states have internal predecessors, (143), 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) [2021-10-13 01:15:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-10-13 01:15:24,964 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 22 [2021-10-13 01:15:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:24,965 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-10-13 01:15:24,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-13 01:15:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-10-13 01:15:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 01:15:24,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:24,966 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:24,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:25,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:15:25,176 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:15:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:25,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1742772450, now seen corresponding path program 1 times [2021-10-13 01:15:25,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:15:25,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300684784] [2021-10-13 01:15:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:25,177 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:15:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:15:25,178 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:15:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 01:15:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:25,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 01:15:25,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:25,458 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 [2021-10-13 01:15:25,521 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 01:15:25,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 25 [2021-10-13 01:15:25,593 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 33 treesize of output 29 [2021-10-13 01:15:25,653 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 01:15:25,653 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 45 treesize of output 44 [2021-10-13 01:15:25,909 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 01:15:25,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 46 [2021-10-13 01:15:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:26,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:15:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:26,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:15:26,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300684784] [2021-10-13 01:15:26,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300684784] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:26,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:26,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-10-13 01:15:26,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836100307] [2021-10-13 01:15:26,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:15:26,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:15:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:15:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:15:26,278 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-10-13 01:15:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:28,078 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2021-10-13 01:15:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:15:28,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 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 23 [2021-10-13 01:15:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:28,081 INFO L225 Difference]: With dead ends: 158 [2021-10-13 01:15:28,081 INFO L226 Difference]: Without dead ends: 158 [2021-10-13 01:15:28,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 17 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 683.3ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:15:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-13 01:15:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 131. [2021-10-13 01:15:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 127 states have internal predecessors, (149), 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) [2021-10-13 01:15:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2021-10-13 01:15:28,086 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 23 [2021-10-13 01:15:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:28,087 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2021-10-13 01:15:28,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-10-13 01:15:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2021-10-13 01:15:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 01:15:28,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:28,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:28,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:28,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:15:28,289 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:15:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1742772451, now seen corresponding path program 1 times [2021-10-13 01:15:28,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:15:28,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203667563] [2021-10-13 01:15:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:28,290 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:15:28,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:15:28,291 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:15:28,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 01:15:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:28,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 01:15:28,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:28,637 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 [2021-10-13 01:15:28,726 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:15:28,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-10-13 01:15:28,793 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 17 treesize of output 13 [2021-10-13 01:15:28,801 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 [2021-10-13 01:15:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:28,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 01:15:28,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:28,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:15:29,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:15:29,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-10-13 01:15:29,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:15:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2021-10-13 01:15:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:29,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:15:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:30,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:15:30,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203667563] [2021-10-13 01:15:30,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203667563] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:30,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:30,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 14 [2021-10-13 01:15:30,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021165448] [2021-10-13 01:15:30,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:15:30,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:15:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:15:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:15:30,034 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 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) [2021-10-13 01:15:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:15:32,658 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2021-10-13 01:15:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:15:32,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 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 23 [2021-10-13 01:15:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:15:32,660 INFO L225 Difference]: With dead ends: 190 [2021-10-13 01:15:32,660 INFO L226 Difference]: Without dead ends: 190 [2021-10-13 01:15:32,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:15:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-13 01:15:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133. [2021-10-13 01:15:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 107 states have (on average 1.411214953271028) internal successors, (151), 129 states have internal predecessors, (151), 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) [2021-10-13 01:15:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2021-10-13 01:15:32,666 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 23 [2021-10-13 01:15:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:15:32,666 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2021-10-13 01:15:32,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 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) [2021-10-13 01:15:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2021-10-13 01:15:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 01:15:32,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:15:32,668 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:15:32,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 01:15:32,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:15:32,874 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:15:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:15:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash -232916121, now seen corresponding path program 1 times [2021-10-13 01:15:32,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:15:32,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097276145] [2021-10-13 01:15:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:15:32,875 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:15:32,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:15:32,876 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:15:32,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 01:15:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:15:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 01:15:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:15:33,260 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 [2021-10-13 01:15:33,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:15:33,384 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:15:33,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 01:15:33,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:15:33,523 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 [2021-10-13 01:15:33,535 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 43 treesize of output 39 [2021-10-13 01:15:33,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:33,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:15:33,551 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:15:33,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 01:15:33,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:33,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 01:15:33,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:33,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2021-10-13 01:15:33,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:33,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:15:33,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:15:33,653 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 01:15:33,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 36 [2021-10-13 01:15:33,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:15:33,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-10-13 01:15:33,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:15:33,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-10-13 01:15:34,074 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:15:34,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-13 01:15:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:34,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:15:34,508 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 47 treesize of output 45 [2021-10-13 01:15:34,516 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-13 01:15:34,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-10-13 01:15:36,883 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_main_~x~0.base_103 (_ BitVec 32))) (or (not (= (_ bv1 32) (select (select (store |c_#memory_int| v_main_~x~0.base_103 (store (store (store (select |c_#memory_int| v_main_~x~0.base_103) (_ bv8 32) (_ bv1 32)) (_ bv0 32) v_DerPreprocessor_6) (_ bv4 32) v_DerPreprocessor_5)) c_main_~head~0.base) (bvadd c_main_~head~0.offset (_ bv8 32))))) (not (= (_ bv0 1) (select |c_#valid| v_main_~x~0.base_103))))) is different from false [2021-10-13 01:15:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:15:37,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:15:37,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097276145] [2021-10-13 01:15:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097276145] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:15:37,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:15:37,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 22 [2021-10-13 01:15:37,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214143537] [2021-10-13 01:15:37,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 01:15:37,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:15:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 01:15:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=363, Unknown=1, NotChecked=38, Total=462 [2021-10-13 01:15:37,299 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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) [2021-10-13 01:16:03,901 WARN L207 SmtUtils]: Spent 10.09 s on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-10-13 01:16:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:12,648 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2021-10-13 01:16:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:16:12,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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 25 [2021-10-13 01:16:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:12,651 INFO L225 Difference]: With dead ends: 197 [2021-10-13 01:16:12,651 INFO L226 Difference]: Without dead ends: 197 [2021-10-13 01:16:12,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 29931.2ms TimeCoverageRelationStatistics Valid=166, Invalid=821, Unknown=9, NotChecked=60, Total=1056 [2021-10-13 01:16:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-13 01:16:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2021-10-13 01:16:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.3781512605042017) internal successors, (164), 141 states have internal predecessors, (164), 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) [2021-10-13 01:16:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2021-10-13 01:16:12,658 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 25 [2021-10-13 01:16:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:12,658 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2021-10-13 01:16:12,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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) [2021-10-13 01:16:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2021-10-13 01:16:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 01:16:12,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:12,660 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:12,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 01:16:12,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:12,889 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr58ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:16:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1368706167, now seen corresponding path program 1 times [2021-10-13 01:16:12,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:12,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514525828] [2021-10-13 01:16:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:12,891 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:12,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:12,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:12,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 01:16:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:13,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:16:13,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:13,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:13,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:13,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514525828] [2021-10-13 01:16:13,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514525828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:13,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:13,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 01:16:13,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292424696] [2021-10-13 01:16:13,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:16:13,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:16:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:16:13,367 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-10-13 01:16:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:13,774 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2021-10-13 01:16:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:16:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 26 [2021-10-13 01:16:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:13,777 INFO L225 Difference]: With dead ends: 170 [2021-10-13 01:16:13,778 INFO L226 Difference]: Without dead ends: 170 [2021-10-13 01:16:13,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:16:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-13 01:16:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 145. [2021-10-13 01:16:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 141 states have internal predecessors, (163), 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) [2021-10-13 01:16:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-10-13 01:16:13,783 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 26 [2021-10-13 01:16:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:13,784 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-10-13 01:16:13,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2021-10-13 01:16:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-10-13 01:16:13,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 01:16:13,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:13,785 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:13,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:13,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:13,997 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:16:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:13,998 INFO L82 PathProgramCache]: Analyzing trace with hash 957496094, now seen corresponding path program 1 times [2021-10-13 01:16:13,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:13,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699623419] [2021-10-13 01:16:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:13,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:13,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:14,000 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:14,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 01:16:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:14,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 01:16:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:14,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:16:14,536 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 01:16:14,537 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 25 treesize of output 13 [2021-10-13 01:16:14,595 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 19 treesize of output 7 [2021-10-13 01:16:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:14,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:14,733 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 83 treesize of output 77 [2021-10-13 01:16:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:14,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:14,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699623419] [2021-10-13 01:16:14,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699623419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:14,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:14,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-13 01:16:14,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540056589] [2021-10-13 01:16:14,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:16:14,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:16:14,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:16:14,869 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-13 01:16:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:16,071 INFO L93 Difference]: Finished difference Result 193 states and 213 transitions. [2021-10-13 01:16:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:16:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 27 [2021-10-13 01:16:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:16,074 INFO L225 Difference]: With dead ends: 193 [2021-10-13 01:16:16,074 INFO L226 Difference]: Without dead ends: 193 [2021-10-13 01:16:16,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:16:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-13 01:16:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 150. [2021-10-13 01:16:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 124 states have (on average 1.3548387096774193) internal successors, (168), 146 states have internal predecessors, (168), 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) [2021-10-13 01:16:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 171 transitions. [2021-10-13 01:16:16,082 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 171 transitions. Word has length 27 [2021-10-13 01:16:16,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:16,083 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 171 transitions. [2021-10-13 01:16:16,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-13 01:16:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 171 transitions. [2021-10-13 01:16:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 01:16:16,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:16,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:16,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:16,304 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:16:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:16,304 INFO L82 PathProgramCache]: Analyzing trace with hash -384022952, now seen corresponding path program 1 times [2021-10-13 01:16:16,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:16,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275651707] [2021-10-13 01:16:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:16,305 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:16,306 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:16,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 01:16:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:16,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 01:16:16,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:16,809 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 [2021-10-13 01:16:16,817 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 [2021-10-13 01:16:16,978 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 [2021-10-13 01:16:16,986 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 [2021-10-13 01:16:17,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 01:16:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-13 01:16:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:17,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:16:17,256 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 28 treesize of output 24 [2021-10-13 01:16:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:17,523 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 8 treesize of output 4 [2021-10-13 01:16:17,530 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 8 treesize of output 4 [2021-10-13 01:16:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:17,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:16:17,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275651707] [2021-10-13 01:16:17,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275651707] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:16:17,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:16:17,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 12 [2021-10-13 01:16:17,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230179474] [2021-10-13 01:16:17,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:16:17,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:16:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:16:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:16:17,571 INFO L87 Difference]: Start difference. First operand 150 states and 171 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) [2021-10-13 01:16:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:16:19,148 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2021-10-13 01:16:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 01:16:19,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 28 [2021-10-13 01:16:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:16:19,150 INFO L225 Difference]: With dead ends: 188 [2021-10-13 01:16:19,150 INFO L226 Difference]: Without dead ends: 188 [2021-10-13 01:16:19,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-13 01:16:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-13 01:16:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2021-10-13 01:16:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.3384615384615384) internal successors, (174), 152 states have internal predecessors, (174), 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) [2021-10-13 01:16:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2021-10-13 01:16:19,157 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 28 [2021-10-13 01:16:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:16:19,157 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2021-10-13 01:16:19,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) [2021-10-13 01:16:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2021-10-13 01:16:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 01:16:19,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:16:19,158 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:16:19,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 01:16:19,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:16:19,371 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-13 01:16:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:16:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1881186989, now seen corresponding path program 1 times [2021-10-13 01:16:19,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:16:19,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182166953] [2021-10-13 01:16:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:16:19,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:16:19,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:16:19,373 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:16:19,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 01:16:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:16:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 01:16:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:16:19,989 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 [2021-10-13 01:16:19,994 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 [2021-10-13 01:16:20,036 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 [2021-10-13 01:16:20,043 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 [2021-10-13 01:16:20,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 01:16:20,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 01:16:20,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:16:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:16:20,382 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:16:20,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-10-13 01:16:20,422 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:16:20,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-13 01:16:20,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:16:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:16:20,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 01:16:20,643 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-13 01:16:20,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 62 [2021-10-13 01:16:20,690 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-13 01:16:20,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 75 [2021-10-13 01:16:20,900 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-10-13 01:16:20,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 83 [2021-10-13 01:16:20,954 INFO L354 Elim1Store]: treesize reduction 132, result has 18.5 percent of original size [2021-10-13 01:16:20,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 96 [2021-10-13 01:16:22,629 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-10-13 01:16:22,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 89 [2021-10-13 01:16:22,670 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-10-13 01:16:22,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 55 [2021-10-13 01:16:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:16:22,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:17:55,168 INFO L354 Elim1Store]: treesize reduction 171, result has 24.0 percent of original size [2021-10-13 01:17:55,169 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 611591 treesize of output 369631 [2021-10-13 01:18:07,414 WARN L207 SmtUtils]: Spent 12.24 s on a formula simplification. DAG size of input: 550 DAG size of output: 515 [2021-10-13 01:18:07,496 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 12224837 treesize of output 12138821 [2021-10-13 01:25:51,695 WARN L207 SmtUtils]: Spent 7.74 m on a formula simplification. DAG size of input: 2586 DAG size of output: 2543 [2021-10-13 01:25:52,008 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-13 01:25:52,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7889189 treesize of output 7339811 [2021-10-13 01:26:07,515 WARN L207 SmtUtils]: Spent 15.50 s on a formula simplification that was a NOOP. DAG size: 2548 [2021-10-13 01:26:07,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:26:07,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182166953] [2021-10-13 01:26:07,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-10-13 01:26:07,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1741650884] [2021-10-13 01:26:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:26:07,911 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 01:26:07,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/cvc4 [2021-10-13 01:26:07,938 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 01:26:07,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 01:26:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:26:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 01:26:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:26:08,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7a91cc10 [2021-10-13 01:26:08,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342402477] [2021-10-13 01:26:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:26:08,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:26:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:26:08,851 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:26:08,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 01:26:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:26:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 01:26:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:26:09,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7a91cc10 [2021-10-13 01:26:09,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:26:09,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 01:26:09,369 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-13 01:26:09,369 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 01:26:09,379 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-10-13 01:26:09,381 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 01:26:09,381 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 01:26:09,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 01:26:09,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 01:26:09,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 01:26:09,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 01:26:09,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-13 01:26:09,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 01:26:09,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 01:26:09,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-13 01:26:09,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-13 01:26:09,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-13 01:26:09,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-10-13 01:26:09,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-10-13 01:26:09,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-10-13 01:26:09,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION [2021-10-13 01:26:09,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 01:26:09,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION [2021-10-13 01:26:09,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-10-13 01:26:09,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-10-13 01:26:09,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION [2021-10-13 01:26:09,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:26:09,388 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:26:09,388 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:26:09,388 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:26:09,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 01:26:09,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-13 01:26:09,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 01:26:09,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:26:09,997 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:26:10,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:26:10 BoogieIcfgContainer [2021-10-13 01:26:10,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:26:10,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:26:10,011 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:26:10,011 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:26:10,012 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:56" (3/4) ... [2021-10-13 01:26:10,015 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 01:26:10,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:26:10,016 INFO L168 Benchmark]: Toolchain (without parser) took 734752.80 ms. Allocated memory was 75.5 MB in the beginning and 545.3 MB in the end (delta: 469.8 MB). Free memory was 60.8 MB in the beginning and 422.6 MB in the end (delta: -361.9 MB). Peak memory consumption was 106.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:26:10,017 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 75.5 MB. Free memory was 56.7 MB in the beginning and 56.7 MB in the end (delta: 66.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:26:10,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 465.83 ms. Allocated memory is still 75.5 MB. Free memory was 60.6 MB in the beginning and 52.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-10-13 01:26:10,018 INFO L168 Benchmark]: Boogie Preprocessor took 70.26 ms. Allocated memory is still 75.5 MB. Free memory was 52.5 MB in the beginning and 49.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:26:10,018 INFO L168 Benchmark]: RCFGBuilder took 1019.97 ms. Allocated memory is still 75.5 MB. Free memory was 49.2 MB in the beginning and 43.9 MB in the end (delta: 5.3 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:26:10,019 INFO L168 Benchmark]: TraceAbstraction took 733179.06 ms. Allocated memory was 75.5 MB in the beginning and 545.3 MB in the end (delta: 469.8 MB). Free memory was 43.6 MB in the beginning and 422.6 MB in the end (delta: -379.0 MB). Peak memory consumption was 89.9 MB. Max. memory is 16.1 GB. [2021-10-13 01:26:10,019 INFO L168 Benchmark]: Witness Printer took 4.86 ms. Allocated memory is still 545.3 MB. Free memory is still 422.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:26:10,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 75.5 MB. Free memory was 56.7 MB in the beginning and 56.7 MB in the end (delta: 66.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 465.83 ms. Allocated memory is still 75.5 MB. Free memory was 60.6 MB in the beginning and 52.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.26 ms. Allocated memory is still 75.5 MB. Free memory was 52.5 MB in the beginning and 49.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1019.97 ms. Allocated memory is still 75.5 MB. Free memory was 49.2 MB in the beginning and 43.9 MB in the end (delta: 5.3 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 733179.06 ms. Allocated memory was 75.5 MB in the beginning and 545.3 MB in the end (delta: 469.8 MB). Free memory was 43.6 MB in the beginning and 422.6 MB in the end (delta: -379.0 MB). Peak memory consumption was 89.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.86 ms. Allocated memory is still 545.3 MB. Free memory is still 422.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms 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: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1000] SLL* head = malloc(sizeof(SLL)); [L1001] head->next = ((void*)0) [L1002] head->prev = ((void*)0) [L1003] head->data = 0 [L1005] SLL* x = head; [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1019] COND TRUE __VERIFIER_nondet_int() [L1020] x = malloc(sizeof(SLL)) [L1021] x->data = 1 [L1022] x->next = head [L1023] x->prev = ((void*)0) [L1024] head = x [L1049] x = head [L1052] EXPR x->data [L1052] COND FALSE !(x->data != 1) [L1058] EXPR x->next [L1058] x = x->next [L1059] COND TRUE \read(*x) [L1061] EXPR x->data [L1061] COND FALSE !(x->data == 1) [L1063] EXPR x->next [L1063] x = x->next [L1059] COND TRUE \read(*x) [L1061] x->data - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1002]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1002]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 997]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 135 locations, 59 error locations. Started 1 CEGAR loops. OverallTime: 733077.7ms, OverallIterations: 18, TraceHistogramMax: 2, EmptinessCheckTime: 59.0ms, AutomataDifference: 100545.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1160 SDtfs, 2435 SDslu, 3151 SDs, 0 SdLazy, 5408 SolverSat, 535 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 28141.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 709 GetRequests, 452 SyntacticMatches, 53 SemanticMatches, 204 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 96331.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=17, InterpolantAutomatonStates: 164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 189.7ms AutomataMinimizationTime, 17 MinimizatonAttempts, 521 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 171.0ms SsaConstructionTime, 1048.1ms SatisfiabilityAnalysisTime, 33957.5ms InterpolantComputationTime, 320 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 606 ConstructedInterpolants, 46 QuantifiedInterpolants, 5824 SizeOfPredicates, 116 NumberOfNonLiveVariables, 1897 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 6/6 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 [2021-10-13 01:26:10,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e6f975-e544-425d-8ed7-7298fce57bf5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...