./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:08:02,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:08:02,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:08:02,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:08:02,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:08:02,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:08:02,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:08:02,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:08:02,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:08:02,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:08:02,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:08:02,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:08:02,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:08:02,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:08:02,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:08:02,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:08:02,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:08:02,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:08:02,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:08:02,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:08:02,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:08:03,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:08:03,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:08:03,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:08:03,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:08:03,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:08:03,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:08:03,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:08:03,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:08:03,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:08:03,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:08:03,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:08:03,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:08:03,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:08:03,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:08:03,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:08:03,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:08:03,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:08:03,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:08:03,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:08:03,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:08:03,032 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:08:03,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:08:03,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:08:03,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:08:03,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:08:03,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:08:03,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:08:03,073 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:08:03,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:08:03,074 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:08:03,074 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:08:03,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:08:03,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:08:03,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:08:03,076 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:08:03,077 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:08:03,077 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:08:03,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:08:03,077 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:08:03,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:08:03,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:08:03,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:08:03,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:08:03,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:08:03,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:08:03,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:08:03,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:08:03,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:08:03,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:08:03,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:08:03,083 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_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2021-10-21 19:08:03,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:08:03,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:08:03,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:08:03,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:08:03,482 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:08:03,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-10-21 19:08:03,565 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data/a07d30e0a/521d8e22271948659f6a3d21775306b3/FLAG68d4083b0 [2021-10-21 19:08:04,177 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:08:04,179 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-10-21 19:08:04,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data/a07d30e0a/521d8e22271948659f6a3d21775306b3/FLAG68d4083b0 [2021-10-21 19:08:04,436 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data/a07d30e0a/521d8e22271948659f6a3d21775306b3 [2021-10-21 19:08:04,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:08:04,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:08:04,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:08:04,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:08:04,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:08:04,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:04,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480268c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04, skipping insertion in model container [2021-10-21 19:08:04,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:04,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:08:04,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:08:04,876 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_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-10-21 19:08:04,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:08:04,890 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:08:04,929 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_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-10-21 19:08:04,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:08:04,962 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:08:04,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04 WrapperNode [2021-10-21 19:08:04,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:08:04,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:08:04,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:08:04,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:08:04,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:04,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:04,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:04,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:05,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:05,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:05,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:05,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:08:05,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:08:05,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:08:05,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:08:05,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (1/1) ... [2021-10-21 19:08:05,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:08:05,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:05,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:08:05,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:08:05,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:08:05,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:08:05,129 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:08:05,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:08:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:08:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:08:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:08:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:08:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:08:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:08:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:08:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:08:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:08:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:08:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:08:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:08:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:08:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:08:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:08:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:08:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:08:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:08:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:08:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:08:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:08:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:08:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:08:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:08:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:08:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:08:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:08:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:08:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:08:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:08:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:08:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:08:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:08:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:08:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:08:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:08:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:08:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:08:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:08:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:08:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:08:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:08:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:08:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:08:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:08:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:08:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:08:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:08:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:08:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:08:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:08:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:08:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:08:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:08:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:08:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:08:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:08:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:08:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:08:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:08:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:08:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:08:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:08:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:08:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:08:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:08:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:08:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:08:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:08:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:08:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:08:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:08:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:08:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:08:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:08:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:08:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:08:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:08:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:08:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:08:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:08:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:08:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:08:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:08:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:08:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:08:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:08:05,155 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:08:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:08:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:08:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:08:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:08:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:08:05,157 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:08:05,157 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:08:05,157 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:08:05,157 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:08:05,158 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:08:05,158 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:08:05,158 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:08:05,159 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:08:05,159 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:08:05,159 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:08:05,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:08:05,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:08:05,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:08:05,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:08:05,161 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:08:05,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:08:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:08:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:08:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:08:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:08:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:08:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:08:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:08:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:08:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:08:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:08:05,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:08:05,838 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-21 19:08:05,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:08:05 BoogieIcfgContainer [2021-10-21 19:08:05,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:08:05,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:08:05,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:08:05,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:08:05,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:08:04" (1/3) ... [2021-10-21 19:08:05,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282647c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:08:05, skipping insertion in model container [2021-10-21 19:08:05,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:04" (2/3) ... [2021-10-21 19:08:05,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282647c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:08:05, skipping insertion in model container [2021-10-21 19:08:05,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:08:05" (3/3) ... [2021-10-21 19:08:05,880 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2021-10-21 19:08:05,890 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:08:05,892 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-21 19:08:05,967 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:08:05,981 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:08:05,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-21 19:08:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 99 states have internal predecessors, (115), 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) [2021-10-21 19:08:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 19:08:06,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:06,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:06,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash -328980574, now seen corresponding path program 1 times [2021-10-21 19:08:06,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:06,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810592847] [2021-10-21 19:08:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:06,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:06,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:06,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:06,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810592847] [2021-10-21 19:08:06,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810592847] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:06,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:06,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:08:06,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52945010] [2021-10-21 19:08:06,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:08:06,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:08:06,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:08:06,475 INFO L87 Difference]: Start difference. First operand has 104 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 99 states have internal predecessors, (115), 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) [2021-10-21 19:08:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:06,907 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2021-10-21 19:08:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:08:06,909 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 [2021-10-21 19:08:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:06,927 INFO L225 Difference]: With dead ends: 131 [2021-10-21 19:08:06,928 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:08:06,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:08:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:08:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-10-21 19:08:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 94 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-10-21 19:08:06,995 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 7 [2021-10-21 19:08:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:06,997 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-10-21 19:08:06,997 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) [2021-10-21 19:08:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-10-21 19:08:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 19:08:06,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:06,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:06,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:08:06,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash -328980573, now seen corresponding path program 1 times [2021-10-21 19:08:07,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:07,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692623670] [2021-10-21 19:08:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:07,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:07,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:07,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:07,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692623670] [2021-10-21 19:08:07,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692623670] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:07,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:07,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:08:07,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776463494] [2021-10-21 19:08:07,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:08:07,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:08:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:08:07,182 INFO L87 Difference]: Start difference. First operand 98 states and 104 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) [2021-10-21 19:08:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:07,491 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2021-10-21 19:08:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:08:07,492 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 [2021-10-21 19:08:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:07,500 INFO L225 Difference]: With dead ends: 125 [2021-10-21 19:08:07,500 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 19:08:07,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:08:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 19:08:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-10-21 19:08:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 92 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-10-21 19:08:07,529 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 7 [2021-10-21 19:08:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:07,529 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-10-21 19:08:07,530 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) [2021-10-21 19:08:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-10-21 19:08:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:08:07,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:07,532 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:07,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:08:07,532 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash -761839981, now seen corresponding path program 1 times [2021-10-21 19:08:07,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:07,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694587207] [2021-10-21 19:08:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:07,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:07,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:07,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:07,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694587207] [2021-10-21 19:08:07,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694587207] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:07,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:07,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:08:07,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481840353] [2021-10-21 19:08:07,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:08:07,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:08:07,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:08:07,756 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:08,055 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-10-21 19:08:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:08:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 19:08:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:08,058 INFO L225 Difference]: With dead ends: 99 [2021-10-21 19:08:08,058 INFO L226 Difference]: Without dead ends: 99 [2021-10-21 19:08:08,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:08:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-21 19:08:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2021-10-21 19:08:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 87 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2021-10-21 19:08:08,067 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 12 [2021-10-21 19:08:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:08,068 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2021-10-21 19:08:08,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2021-10-21 19:08:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:08:08,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:08,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:08,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:08:08,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:08,070 INFO L82 PathProgramCache]: Analyzing trace with hash -761839980, now seen corresponding path program 1 times [2021-10-21 19:08:08,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:08,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063103371] [2021-10-21 19:08:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:08,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:08,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:08,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:08,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063103371] [2021-10-21 19:08:08,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063103371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:08,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:08,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:08:08,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934388258] [2021-10-21 19:08:08,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:08:08,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:08:08,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:08:08,234 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:08,577 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-10-21 19:08:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:08:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-21 19:08:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:08,587 INFO L225 Difference]: With dead ends: 121 [2021-10-21 19:08:08,587 INFO L226 Difference]: Without dead ends: 121 [2021-10-21 19:08:08,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:08:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-21 19:08:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2021-10-21 19:08:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.4935064935064934) internal successors, (115), 102 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-10-21 19:08:08,598 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 12 [2021-10-21 19:08:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:08,598 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-10-21 19:08:08,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-10-21 19:08:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:08:08,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:08,600 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:08,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:08:08,601 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash 551534933, now seen corresponding path program 1 times [2021-10-21 19:08:08,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:08,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620924686] [2021-10-21 19:08:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:08,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:08,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:08,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:08,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620924686] [2021-10-21 19:08:08,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620924686] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:08,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:08,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:08:08,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323482651] [2021-10-21 19:08:08,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:08:08,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:08,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:08:08,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:08:08,707 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:09,040 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-10-21 19:08:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:08:09,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-21 19:08:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:09,042 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:08:09,042 INFO L226 Difference]: Without dead ends: 107 [2021-10-21 19:08:09,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:08:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-21 19:08:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-10-21 19:08:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 101 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-10-21 19:08:09,050 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 16 [2021-10-21 19:08:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:09,051 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-10-21 19:08:09,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-10-21 19:08:09,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:08:09,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:09,053 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:09,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:08:09,053 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:09,054 INFO L82 PathProgramCache]: Analyzing trace with hash 551534934, now seen corresponding path program 1 times [2021-10-21 19:08:09,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:09,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895286696] [2021-10-21 19:08:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:09,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:09,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:09,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:09,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895286696] [2021-10-21 19:08:09,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895286696] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:09,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:09,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:08:09,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238581940] [2021-10-21 19:08:09,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:08:09,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:09,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:08:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:08:09,217 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:09,579 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2021-10-21 19:08:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:08:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-21 19:08:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:09,588 INFO L225 Difference]: With dead ends: 105 [2021-10-21 19:08:09,589 INFO L226 Difference]: Without dead ends: 105 [2021-10-21 19:08:09,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:08:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-21 19:08:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2021-10-21 19:08:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 92 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2021-10-21 19:08:09,596 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 16 [2021-10-21 19:08:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:09,597 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2021-10-21 19:08:09,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2021-10-21 19:08:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:08:09,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:09,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:09,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:08:09,599 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:09,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash -393029940, now seen corresponding path program 1 times [2021-10-21 19:08:09,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:09,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441857411] [2021-10-21 19:08:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:09,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:09,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:09,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441857411] [2021-10-21 19:08:09,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441857411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:09,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:09,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:08:09,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859150471] [2021-10-21 19:08:09,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:08:09,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:09,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:08:09,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:08:09,745 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:09,966 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-10-21 19:08:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:08:09,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-21 19:08:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:09,968 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:08:09,968 INFO L226 Difference]: Without dead ends: 107 [2021-10-21 19:08:09,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:08:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-21 19:08:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2021-10-21 19:08:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 78 states have (on average 1.435897435897436) internal successors, (112), 98 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2021-10-21 19:08:09,975 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 19 [2021-10-21 19:08:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:09,976 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2021-10-21 19:08:09,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2021-10-21 19:08:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:08:09,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:09,978 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] [2021-10-21 19:08:09,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:08:09,978 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash 229411301, now seen corresponding path program 1 times [2021-10-21 19:08:09,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:09,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294249390] [2021-10-21 19:08:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:09,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:10,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:10,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:10,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294249390] [2021-10-21 19:08:10,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294249390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:10,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212620995] [2021-10-21 19:08:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:10,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:10,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:10,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:08:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:10,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:08:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:10,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:10,406 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:08:10,406 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 [2021-10-21 19:08:10,494 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 [2021-10-21 19:08:10,686 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 30 treesize of output 18 [2021-10-21 19:08:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:10,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212620995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:10,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:10,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-21 19:08:10,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884497212] [2021-10-21 19:08:10,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:08:10,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:08:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:08:10,775 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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) [2021-10-21 19:08:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:11,285 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2021-10-21 19:08:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:08:11,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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 22 [2021-10-21 19:08:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:11,287 INFO L225 Difference]: With dead ends: 150 [2021-10-21 19:08:11,287 INFO L226 Difference]: Without dead ends: 150 [2021-10-21 19:08:11,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:08:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-21 19:08:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2021-10-21 19:08:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2021-10-21 19:08:11,293 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 22 [2021-10-21 19:08:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:11,294 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2021-10-21 19:08:11,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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) [2021-10-21 19:08:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2021-10-21 19:08:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:08:11,295 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:11,296 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] [2021-10-21 19:08:11,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-21 19:08:11,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 19:08:11,509 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:11,510 INFO L82 PathProgramCache]: Analyzing trace with hash 229411302, now seen corresponding path program 1 times [2021-10-21 19:08:11,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:11,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862543712] [2021-10-21 19:08:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:11,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:11,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:11,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:11,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862543712] [2021-10-21 19:08:11,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862543712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:11,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950771978] [2021-10-21 19:08:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:11,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:11,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:11,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:11,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:08:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:11,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:08:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:11,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:11,964 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:11,964 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 [2021-10-21 19:08:11,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 16 [2021-10-21 19:08:12,041 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 37 treesize of output 33 [2021-10-21 19:08:12,047 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 34 treesize of output 30 [2021-10-21 19:08:12,251 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 50 treesize of output 38 [2021-10-21 19:08:12,263 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 23 [2021-10-21 19:08:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:12,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950771978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:12,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:12,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-21 19:08:12,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314730907] [2021-10-21 19:08:12,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:08:12,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:12,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:08:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:08:12,362 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2021-10-21 19:08:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:13,633 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2021-10-21 19:08:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:08:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 22 [2021-10-21 19:08:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:13,637 INFO L225 Difference]: With dead ends: 171 [2021-10-21 19:08:13,637 INFO L226 Difference]: Without dead ends: 171 [2021-10-21 19:08:13,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:08:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-21 19:08:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 104. [2021-10-21 19:08:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 100 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-10-21 19:08:13,644 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 22 [2021-10-21 19:08:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:13,645 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-10-21 19:08:13,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2021-10-21 19:08:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-10-21 19:08:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:08:13,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:13,646 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] [2021-10-21 19:08:13,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:13,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:13,861 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:13,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1479815103, now seen corresponding path program 1 times [2021-10-21 19:08:13,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:13,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42475461] [2021-10-21 19:08:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:13,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:14,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:14,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:14,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42475461] [2021-10-21 19:08:14,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42475461] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:14,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:14,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:08:14,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499836024] [2021-10-21 19:08:14,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:08:14,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:14,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:08:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:08:14,022 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:14,428 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2021-10-21 19:08:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:08:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 23 [2021-10-21 19:08:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:14,431 INFO L225 Difference]: With dead ends: 148 [2021-10-21 19:08:14,431 INFO L226 Difference]: Without dead ends: 148 [2021-10-21 19:08:14,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:08:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-21 19:08:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 108. [2021-10-21 19:08:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 85 states have (on average 1.411764705882353) internal successors, (120), 104 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) [2021-10-21 19:08:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2021-10-21 19:08:14,437 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 23 [2021-10-21 19:08:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:14,438 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2021-10-21 19:08:14,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2021-10-21 19:08:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:08:14,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:14,440 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] [2021-10-21 19:08:14,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:08:14,440 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:14,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:14,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1479815102, now seen corresponding path program 1 times [2021-10-21 19:08:14,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:14,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881608224] [2021-10-21 19:08:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:14,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:14,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:14,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:14,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881608224] [2021-10-21 19:08:14,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881608224] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:14,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:14,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:08:14,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455077169] [2021-10-21 19:08:14,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:08:14,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:14,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:08:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:08:14,640 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:15,326 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2021-10-21 19:08:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:08:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23 [2021-10-21 19:08:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:15,328 INFO L225 Difference]: With dead ends: 171 [2021-10-21 19:08:15,328 INFO L226 Difference]: Without dead ends: 171 [2021-10-21 19:08:15,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:08:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-21 19:08:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 110. [2021-10-21 19:08:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 106 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) [2021-10-21 19:08:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-10-21 19:08:15,334 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 23 [2021-10-21 19:08:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:15,334 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-10-21 19:08:15,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-10-21 19:08:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:08:15,335 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:15,336 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] [2021-10-21 19:08:15,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:08:15,336 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash -468135674, now seen corresponding path program 1 times [2021-10-21 19:08:15,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:15,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164771211] [2021-10-21 19:08:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:15,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:15,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:15,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164771211] [2021-10-21 19:08:15,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164771211] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:15,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:15,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-21 19:08:15,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998303303] [2021-10-21 19:08:15,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:08:15,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:15,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:08:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:08:15,628 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-10-21 19:08:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:16,402 INFO L93 Difference]: Finished difference Result 208 states and 230 transitions. [2021-10-21 19:08:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:08:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 [2021-10-21 19:08:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:16,404 INFO L225 Difference]: With dead ends: 208 [2021-10-21 19:08:16,404 INFO L226 Difference]: Without dead ends: 208 [2021-10-21 19:08:16,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:08:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-21 19:08:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 121. [2021-10-21 19:08:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.3775510204081634) internal successors, (135), 117 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2021-10-21 19:08:16,411 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 25 [2021-10-21 19:08:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:16,411 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2021-10-21 19:08:16,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-10-21 19:08:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2021-10-21 19:08:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:08:16,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:16,413 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, 1] [2021-10-21 19:08:16,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:08:16,414 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:16,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1628132728, now seen corresponding path program 1 times [2021-10-21 19:08:16,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:16,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469720816] [2021-10-21 19:08:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:16,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:16,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:16,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:16,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469720816] [2021-10-21 19:08:16,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469720816] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:16,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:16,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:08:16,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052943466] [2021-10-21 19:08:16,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:08:16,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:08:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:08:16,501 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:16,693 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2021-10-21 19:08:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:08:16,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 26 [2021-10-21 19:08:16,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:16,695 INFO L225 Difference]: With dead ends: 140 [2021-10-21 19:08:16,695 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:08:16,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:08:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:08:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 121. [2021-10-21 19:08:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.3673469387755102) internal successors, (134), 117 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) [2021-10-21 19:08:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2021-10-21 19:08:16,700 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 26 [2021-10-21 19:08:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:16,705 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2021-10-21 19:08:16,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2021-10-21 19:08:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:08:16,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:16,710 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:16,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:08:16,711 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:16,712 INFO L82 PathProgramCache]: Analyzing trace with hash -285231333, now seen corresponding path program 2 times [2021-10-21 19:08:16,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:16,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458573470] [2021-10-21 19:08:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:16,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:16,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:08:16,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:16,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458573470] [2021-10-21 19:08:16,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458573470] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:16,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:16,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:08:16,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118333847] [2021-10-21 19:08:16,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:08:16,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:08:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:08:16,937 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-10-21 19:08:17,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:17,286 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-10-21 19:08:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:08:17,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 26 [2021-10-21 19:08:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:17,288 INFO L225 Difference]: With dead ends: 149 [2021-10-21 19:08:17,288 INFO L226 Difference]: Without dead ends: 149 [2021-10-21 19:08:17,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:08:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-21 19:08:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2021-10-21 19:08:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 115 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) [2021-10-21 19:08:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2021-10-21 19:08:17,295 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 26 [2021-10-21 19:08:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:17,296 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2021-10-21 19:08:17,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-10-21 19:08:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2021-10-21 19:08:17,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:08:17,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:17,298 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] [2021-10-21 19:08:17,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:08:17,298 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1043552509, now seen corresponding path program 1 times [2021-10-21 19:08:17,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:17,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434738549] [2021-10-21 19:08:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:17,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:17,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:17,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:17,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434738549] [2021-10-21 19:08:17,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434738549] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:17,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:17,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:08:17,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820991261] [2021-10-21 19:08:17,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:08:17,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:17,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:08:17,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:08:17,528 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 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) [2021-10-21 19:08:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:17,835 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2021-10-21 19:08:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:08:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 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 [2021-10-21 19:08:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:17,837 INFO L225 Difference]: With dead ends: 168 [2021-10-21 19:08:17,837 INFO L226 Difference]: Without dead ends: 168 [2021-10-21 19:08:17,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:08:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-21 19:08:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2021-10-21 19:08:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 118 states have internal predecessors, (133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-10-21 19:08:17,842 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 27 [2021-10-21 19:08:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:17,842 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-10-21 19:08:17,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 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) [2021-10-21 19:08:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-10-21 19:08:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:08:17,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:17,844 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] [2021-10-21 19:08:17,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:08:17,844 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1159983514, now seen corresponding path program 1 times [2021-10-21 19:08:17,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:17,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135571227] [2021-10-21 19:08:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:17,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:18,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:18,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:18,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135571227] [2021-10-21 19:08:18,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135571227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:18,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408084822] [2021-10-21 19:08:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:18,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:18,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:18,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:18,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:08:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:18,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:08:18,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:18,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:18,458 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:08:18,459 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 [2021-10-21 19:08:18,529 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 [2021-10-21 19:08:18,733 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:08:18,733 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 44 treesize of output 20 [2021-10-21 19:08:18,780 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:08:18,780 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 [2021-10-21 19:08:19,094 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:08:19,094 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 [2021-10-21 19:08:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:19,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408084822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:19,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:19,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-21 19:08:19,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77693409] [2021-10-21 19:08:19,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 19:08:19,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:08:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:08:19,202 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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) [2021-10-21 19:08:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:20,545 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2021-10-21 19:08:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 19:08:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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 27 [2021-10-21 19:08:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:20,548 INFO L225 Difference]: With dead ends: 185 [2021-10-21 19:08:20,548 INFO L226 Difference]: Without dead ends: 185 [2021-10-21 19:08:20,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=304, Invalid=1178, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:08:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-21 19:08:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 138. [2021-10-21 19:08:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 115 states have (on average 1.3391304347826087) internal successors, (154), 134 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) [2021-10-21 19:08:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2021-10-21 19:08:20,559 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 27 [2021-10-21 19:08:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:20,559 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2021-10-21 19:08:20,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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) [2021-10-21 19:08:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2021-10-21 19:08:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:08:20,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:20,561 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] [2021-10-21 19:08:20,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:20,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:20,773 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:20,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1159983515, now seen corresponding path program 1 times [2021-10-21 19:08:20,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:20,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850275811] [2021-10-21 19:08:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:20,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:21,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:21,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:21,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850275811] [2021-10-21 19:08:21,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850275811] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:21,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366088994] [2021-10-21 19:08:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:21,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:21,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:21,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:21,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:08:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 19:08:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:21,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:21,409 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:21,409 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 [2021-10-21 19:08:21,420 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 [2021-10-21 19:08:21,474 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 [2021-10-21 19:08:21,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:08:21,675 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-10-21 19:08:21,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2021-10-21 19:08:21,695 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:08:21,695 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 44 treesize of output 20 [2021-10-21 19:08:21,767 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:08:21,768 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 63 treesize of output 45 [2021-10-21 19:08:21,784 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:08:21,784 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 55 treesize of output 50 [2021-10-21 19:08:22,152 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:08:22,153 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 61 treesize of output 40 [2021-10-21 19:08:22,159 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:08:22,160 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 31 treesize of output 19 [2021-10-21 19:08:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:22,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366088994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:22,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:22,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-10-21 19:08:22,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045323086] [2021-10-21 19:08:22,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:08:22,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:08:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:08:22,178 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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) [2021-10-21 19:08:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:23,408 INFO L93 Difference]: Finished difference Result 194 states and 217 transitions. [2021-10-21 19:08:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:08:23,408 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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 27 [2021-10-21 19:08:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:23,410 INFO L225 Difference]: With dead ends: 194 [2021-10-21 19:08:23,410 INFO L226 Difference]: Without dead ends: 194 [2021-10-21 19:08:23,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:08:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-21 19:08:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 146. [2021-10-21 19:08:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 142 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) [2021-10-21 19:08:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2021-10-21 19:08:23,417 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 27 [2021-10-21 19:08:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:23,418 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2021-10-21 19:08:23,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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) [2021-10-21 19:08:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2021-10-21 19:08:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:08:23,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:23,419 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] [2021-10-21 19:08:23,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:23,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:08:23,633 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2011241431, now seen corresponding path program 1 times [2021-10-21 19:08:23,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:23,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503914314] [2021-10-21 19:08:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:23,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:23,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:23,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:23,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503914314] [2021-10-21 19:08:23,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503914314] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:23,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:23,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-21 19:08:23,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586246732] [2021-10-21 19:08:23,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:08:23,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:23,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:08:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:08:23,856 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-10-21 19:08:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:24,314 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2021-10-21 19:08:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:08:24,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 [2021-10-21 19:08:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:24,318 INFO L225 Difference]: With dead ends: 174 [2021-10-21 19:08:24,318 INFO L226 Difference]: Without dead ends: 174 [2021-10-21 19:08:24,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:08:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-10-21 19:08:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 158. [2021-10-21 19:08:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 135 states have (on average 1.2962962962962963) internal successors, (175), 154 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) [2021-10-21 19:08:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2021-10-21 19:08:24,324 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 28 [2021-10-21 19:08:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:24,324 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2021-10-21 19:08:24,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-10-21 19:08:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2021-10-21 19:08:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:08:24,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:24,325 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] [2021-10-21 19:08:24,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:08:24,326 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash -452904322, now seen corresponding path program 1 times [2021-10-21 19:08:24,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:24,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603827221] [2021-10-21 19:08:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:24,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:24,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:24,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:24,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603827221] [2021-10-21 19:08:24,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603827221] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:24,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321509218] [2021-10-21 19:08:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:24,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:24,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:24,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:24,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:08:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:08:24,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:24,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:24,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:08:24,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:08:24,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:08:24,943 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 27 treesize of output 11 [2021-10-21 19:08:24,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:08:24,949 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 27 treesize of output 11 [2021-10-21 19:08:25,040 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:25,041 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 [2021-10-21 19:08:25,101 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 27 treesize of output 11 [2021-10-21 19:08:25,109 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 27 treesize of output 11 [2021-10-21 19:08:25,155 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:08:25,155 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 41 treesize of output 40 [2021-10-21 19:08:25,165 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-21 19:08:25,165 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 42 treesize of output 41 [2021-10-21 19:08:25,586 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 19:08:25,586 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-10-21 19:08:25,598 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-21 19:08:25,598 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 23 [2021-10-21 19:08:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:25,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321509218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:25,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:25,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-21 19:08:25,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584344354] [2021-10-21 19:08:25,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:08:25,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:08:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:08:25,620 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 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) [2021-10-21 19:08:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:26,437 INFO L93 Difference]: Finished difference Result 189 states and 210 transitions. [2021-10-21 19:08:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:08:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 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 28 [2021-10-21 19:08:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:26,442 INFO L225 Difference]: With dead ends: 189 [2021-10-21 19:08:26,443 INFO L226 Difference]: Without dead ends: 189 [2021-10-21 19:08:26,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:08:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-21 19:08:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 160. [2021-10-21 19:08:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2919708029197081) internal successors, (177), 156 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2021-10-21 19:08:26,450 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 28 [2021-10-21 19:08:26,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:26,451 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2021-10-21 19:08:26,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 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) [2021-10-21 19:08:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2021-10-21 19:08:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:08:26,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:26,452 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] [2021-10-21 19:08:26,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:26,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:26,677 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr42ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:26,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1266001972, now seen corresponding path program 1 times [2021-10-21 19:08:26,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:26,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068662888] [2021-10-21 19:08:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:26,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:26,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:26,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:26,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068662888] [2021-10-21 19:08:26,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068662888] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:26,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:26,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:08:26,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725256449] [2021-10-21 19:08:26,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:08:26,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:08:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:08:26,769 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-21 19:08:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:27,124 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2021-10-21 19:08:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:08:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-10-21 19:08:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:27,127 INFO L225 Difference]: With dead ends: 197 [2021-10-21 19:08:27,127 INFO L226 Difference]: Without dead ends: 197 [2021-10-21 19:08:27,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:08:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-21 19:08:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 160. [2021-10-21 19:08:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2773722627737227) internal successors, (175), 156 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) [2021-10-21 19:08:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 178 transitions. [2021-10-21 19:08:27,134 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 178 transitions. Word has length 28 [2021-10-21 19:08:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:27,135 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 178 transitions. [2021-10-21 19:08:27,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-21 19:08:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 178 transitions. [2021-10-21 19:08:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:08:27,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:27,137 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] [2021-10-21 19:08:27,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:08:27,137 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:27,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1046433091, now seen corresponding path program 2 times [2021-10-21 19:08:27,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:27,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962040358] [2021-10-21 19:08:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:27,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:27,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:27,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:27,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962040358] [2021-10-21 19:08:27,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962040358] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:27,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503224390] [2021-10-21 19:08:27,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:08:27,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:27,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:27,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:08:27,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:08:27,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:08:27,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-21 19:08:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:27,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:27,968 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:27,968 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 [2021-10-21 19:08:28,032 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 [2021-10-21 19:08:28,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:08:28,194 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:08:28,195 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 35 treesize of output 15 [2021-10-21 19:08:28,203 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 27 treesize of output 11 [2021-10-21 19:08:28,266 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:08:28,267 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 55 treesize of output 41 [2021-10-21 19:08:28,277 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:08:28,277 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 47 treesize of output 41 [2021-10-21 19:08:28,574 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:08:28,575 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 69 treesize of output 36 [2021-10-21 19:08:28,579 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:08:28,579 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 30 treesize of output 17 [2021-10-21 19:08:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:28,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503224390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:28,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:28,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-10-21 19:08:28,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501385781] [2021-10-21 19:08:28,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:08:28,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:08:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:08:28,599 INFO L87 Difference]: Start difference. First operand 160 states and 178 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 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) [2021-10-21 19:08:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:31,992 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2021-10-21 19:08:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:08:31,992 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 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 32 [2021-10-21 19:08:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:31,994 INFO L225 Difference]: With dead ends: 192 [2021-10-21 19:08:31,994 INFO L226 Difference]: Without dead ends: 192 [2021-10-21 19:08:31,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 771.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:08:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-21 19:08:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 159. [2021-10-21 19:08:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 136 states have (on average 1.2647058823529411) internal successors, (172), 155 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:32,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2021-10-21 19:08:32,002 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 32 [2021-10-21 19:08:32,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:32,003 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2021-10-21 19:08:32,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 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) [2021-10-21 19:08:32,003 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2021-10-21 19:08:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:08:32,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:32,004 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] [2021-10-21 19:08:32,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:32,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:32,221 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr42ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:32,222 INFO L82 PathProgramCache]: Analyzing trace with hash 135230692, now seen corresponding path program 1 times [2021-10-21 19:08:32,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:32,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064626862] [2021-10-21 19:08:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:32,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:32,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:32,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:32,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064626862] [2021-10-21 19:08:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064626862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:32,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:32,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:08:32,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804660718] [2021-10-21 19:08:32,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:08:32,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:32,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:08:32,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:08:32,274 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:32,405 INFO L93 Difference]: Finished difference Result 163 states and 179 transitions. [2021-10-21 19:08:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:08:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 33 [2021-10-21 19:08:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:32,409 INFO L225 Difference]: With dead ends: 163 [2021-10-21 19:08:32,409 INFO L226 Difference]: Without dead ends: 163 [2021-10-21 19:08:32,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:08:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-21 19:08:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-10-21 19:08:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 156 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) [2021-10-21 19:08:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2021-10-21 19:08:32,414 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 33 [2021-10-21 19:08:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:32,414 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2021-10-21 19:08:32,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2021-10-21 19:08:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:08:32,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:32,415 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] [2021-10-21 19:08:32,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 19:08:32,416 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:32,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:32,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1020126892, now seen corresponding path program 1 times [2021-10-21 19:08:32,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:32,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155299077] [2021-10-21 19:08:32,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:32,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:32,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:32,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:32,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155299077] [2021-10-21 19:08:32,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155299077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:32,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23121609] [2021-10-21 19:08:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:32,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:32,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:32,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:32,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:08:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 19:08:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:33,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:33,130 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 [2021-10-21 19:08:33,230 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:33,231 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 [2021-10-21 19:08:33,295 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 [2021-10-21 19:08:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:08:33,312 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 25 treesize of output 13 [2021-10-21 19:08:33,408 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 11 [2021-10-21 19:08:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:08:33,477 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 [2021-10-21 19:08:33,567 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-21 19:08:33,568 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 [2021-10-21 19:08:33,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:33,760 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 [2021-10-21 19:08:33,861 INFO L354 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2021-10-21 19:08:33,862 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 [2021-10-21 19:08:33,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:08:33,955 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 [2021-10-21 19:08:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:08:33,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:08:33,964 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:08:33,964 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 [2021-10-21 19:08:34,161 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 40 treesize of output 32 [2021-10-21 19:08:34,164 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 [2021-10-21 19:08:34,280 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:34,281 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 [2021-10-21 19:08:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:34,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23121609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:34,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:34,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-10-21 19:08:34,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972851583] [2021-10-21 19:08:34,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:08:34,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:08:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:08:34,292 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) 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) [2021-10-21 19:08:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:35,723 INFO L93 Difference]: Finished difference Result 239 states and 257 transitions. [2021-10-21 19:08:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:08:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) 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 33 [2021-10-21 19:08:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:35,724 INFO L225 Difference]: With dead ends: 239 [2021-10-21 19:08:35,724 INFO L226 Difference]: Without dead ends: 239 [2021-10-21 19:08:35,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1118.0ms TimeCoverageRelationStatistics Valid=298, Invalid=2054, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:08:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-10-21 19:08:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 171. [2021-10-21 19:08:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 167 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2021-10-21 19:08:35,730 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 33 [2021-10-21 19:08:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:35,731 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2021-10-21 19:08:35,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) 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) [2021-10-21 19:08:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2021-10-21 19:08:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:08:35,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:35,732 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:35,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:35,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:08:35,949 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1022599576, now seen corresponding path program 3 times [2021-10-21 19:08:35,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:35,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154077522] [2021-10-21 19:08:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:35,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:36,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:36,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:36,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154077522] [2021-10-21 19:08:36,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154077522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:36,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250443274] [2021-10-21 19:08:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:08:36,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:36,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:36,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:36,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:08:36,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:08:36,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:08:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:08:36,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:36,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:36,909 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:36,910 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 [2021-10-21 19:08:36,967 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 [2021-10-21 19:08:37,160 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:08:37,160 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 35 treesize of output 15 [2021-10-21 19:08:37,220 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:08:37,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-10-21 19:08:37,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:37,312 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 [2021-10-21 19:08:37,415 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-21 19:08:37,415 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 2 case distinctions, treesize of input 38 treesize of output 29 [2021-10-21 19:08:37,663 INFO L354 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2021-10-21 19:08:37,664 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 60 treesize of output 44 [2021-10-21 19:08:37,792 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-21 19:08:37,792 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 52 treesize of output 53 [2021-10-21 19:08:38,284 INFO L354 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2021-10-21 19:08:38,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 75 [2021-10-21 19:08:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:38,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250443274] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:38,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:38,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-10-21 19:08:38,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954027790] [2021-10-21 19:08:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 19:08:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 19:08:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:08:38,365 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) [2021-10-21 19:08:53,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:53,657 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2021-10-21 19:08:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-21 19:08:53,658 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 35 [2021-10-21 19:08:53,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:53,659 INFO L225 Difference]: With dead ends: 237 [2021-10-21 19:08:53,659 INFO L226 Difference]: Without dead ends: 237 [2021-10-21 19:08:53,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 7517.5ms TimeCoverageRelationStatistics Valid=527, Invalid=3006, Unknown=7, NotChecked=0, Total=3540 [2021-10-21 19:08:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-21 19:08:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 187. [2021-10-21 19:08:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 164 states have (on average 1.25) internal successors, (205), 183 states have internal predecessors, (205), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:08:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 208 transitions. [2021-10-21 19:08:53,667 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 208 transitions. Word has length 35 [2021-10-21 19:08:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:53,667 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 208 transitions. [2021-10-21 19:08:53,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) [2021-10-21 19:08:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 208 transitions. [2021-10-21 19:08:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:08:53,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:53,668 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:53,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:53,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:53,896 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:08:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1022599575, now seen corresponding path program 2 times [2021-10-21 19:08:53,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:53,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686336457] [2021-10-21 19:08:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:53,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:54,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:54,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686336457] [2021-10-21 19:08:54,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686336457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:54,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913054667] [2021-10-21 19:08:54,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:08:54,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:54,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:54,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:54,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:08:55,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:08:55,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:08:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-21 19:08:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:55,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:55,173 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:55,173 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 [2021-10-21 19:08:55,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:08:55,232 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 [2021-10-21 19:08:55,467 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:08:55,467 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 35 treesize of output 15 [2021-10-21 19:08:55,477 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 27 treesize of output 11 [2021-10-21 19:08:55,548 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:08:55,548 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 19 treesize of output 18 [2021-10-21 19:08:55,572 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:08:55,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-10-21 19:08:55,715 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:55,715 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 [2021-10-21 19:08:55,846 INFO L354 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2021-10-21 19:08:55,848 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 2 case distinctions, treesize of input 26 treesize of output 29 [2021-10-21 19:08:55,879 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-21 19:08:55,879 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 2 case distinctions, treesize of input 38 treesize of output 29 [2021-10-21 19:08:56,248 INFO L354 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2021-10-21 19:08:56,248 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 65 treesize of output 49 [2021-10-21 19:08:56,294 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 27 treesize of output 11 [2021-10-21 19:08:56,438 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-21 19:08:56,439 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 81 treesize of output 82 [2021-10-21 19:08:56,469 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:08:56,469 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 92 treesize of output 91 [2021-10-21 19:08:57,756 INFO L354 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2021-10-21 19:08:57,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 116 [2021-10-21 19:08:57,805 INFO L354 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2021-10-21 19:08:57,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 132 [2021-10-21 19:08:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:58,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913054667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:58,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:58,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-10-21 19:08:58,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367978720] [2021-10-21 19:08:58,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:08:58,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:08:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:08:58,294 INFO L87 Difference]: Start difference. First operand 187 states and 208 transitions. Second operand has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 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) [2021-10-21 19:09:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:04,859 INFO L93 Difference]: Finished difference Result 246 states and 271 transitions. [2021-10-21 19:09:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 19:09:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 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 35 [2021-10-21 19:09:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:04,861 INFO L225 Difference]: With dead ends: 246 [2021-10-21 19:09:04,861 INFO L226 Difference]: Without dead ends: 246 [2021-10-21 19:09:04,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3607.8ms TimeCoverageRelationStatistics Valid=436, Invalid=3104, Unknown=0, NotChecked=0, Total=3540 [2021-10-21 19:09:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-21 19:09:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 189. [2021-10-21 19:09:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 185 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:09:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 211 transitions. [2021-10-21 19:09:04,869 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 211 transitions. Word has length 35 [2021-10-21 19:09:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:04,870 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 211 transitions. [2021-10-21 19:09:04,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 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) [2021-10-21 19:09:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 211 transitions. [2021-10-21 19:09:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:09:04,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:04,871 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] [2021-10-21 19:09:04,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-21 19:09:05,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:09:05,085 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr39REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:09:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash -21569070, now seen corresponding path program 1 times [2021-10-21 19:09:05,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:05,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662572898] [2021-10-21 19:09:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:05,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:05,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:05,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662572898] [2021-10-21 19:09:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662572898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084429541] [2021-10-21 19:09:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:05,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:05,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:05,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:05,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:09:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:09:05,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:05,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:09:06,003 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 [2021-10-21 19:09:06,172 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-21 19:09:06,172 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 [2021-10-21 19:09:06,187 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-21 19:09:06,188 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 [2021-10-21 19:09:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:06,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084429541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:06,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:06,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-10-21 19:09:06,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923346686] [2021-10-21 19:09:06,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:09:06,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:09:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:09:06,227 INFO L87 Difference]: Start difference. First operand 189 states and 211 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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) [2021-10-21 19:09:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:07,113 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2021-10-21 19:09:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:09:07,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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 [2021-10-21 19:09:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:07,115 INFO L225 Difference]: With dead ends: 230 [2021-10-21 19:09:07,115 INFO L226 Difference]: Without dead ends: 230 [2021-10-21 19:09:07,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:09:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-21 19:09:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 200. [2021-10-21 19:09:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 177 states have (on average 1.2429378531073447) internal successors, (220), 196 states have internal predecessors, (220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:09:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 223 transitions. [2021-10-21 19:09:07,122 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 223 transitions. Word has length 36 [2021-10-21 19:09:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:07,122 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 223 transitions. [2021-10-21 19:09:07,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 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) [2021-10-21 19:09:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 223 transitions. [2021-10-21 19:09:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:09:07,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:07,124 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] [2021-10-21 19:09:07,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:07,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:07,337 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr39REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:09:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1852042457, now seen corresponding path program 1 times [2021-10-21 19:09:07,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:07,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148472933] [2021-10-21 19:09:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:07,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:07,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:07,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148472933] [2021-10-21 19:09:07,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148472933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:07,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931967635] [2021-10-21 19:09:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:07,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:07,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:07,573 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:07,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:09:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:08,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:09:08,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:09:08,163 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:09:08,163 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 [2021-10-21 19:09:08,201 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 [2021-10-21 19:09:08,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:09:08,513 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 31 treesize of output 27 [2021-10-21 19:09:08,706 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:09:08,706 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 16 treesize of output 18 [2021-10-21 19:09:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931967635] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:08,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:08,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-10-21 19:09:08,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131112095] [2021-10-21 19:09:08,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:09:08,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:09:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:09:08,756 INFO L87 Difference]: Start difference. First operand 200 states and 223 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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) [2021-10-21 19:09:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:10,293 INFO L93 Difference]: Finished difference Result 232 states and 255 transitions. [2021-10-21 19:09:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:09:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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 [2021-10-21 19:09:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:10,295 INFO L225 Difference]: With dead ends: 232 [2021-10-21 19:09:10,295 INFO L226 Difference]: Without dead ends: 232 [2021-10-21 19:09:10,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 930.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1626, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:09:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-21 19:09:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 214. [2021-10-21 19:09:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 191 states have (on average 1.2617801047120418) internal successors, (241), 210 states have internal predecessors, (241), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:09:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2021-10-21 19:09:10,304 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 36 [2021-10-21 19:09:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:10,305 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2021-10-21 19:09:10,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 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) [2021-10-21 19:09:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2021-10-21 19:09:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:09:10,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:10,306 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] [2021-10-21 19:09:10,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:10,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:09:10,525 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:09:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1852042456, now seen corresponding path program 1 times [2021-10-21 19:09:10,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:10,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636902059] [2021-10-21 19:09:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:10,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:10,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:10,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:10,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636902059] [2021-10-21 19:09:10,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636902059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:10,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621609283] [2021-10-21 19:09:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:10,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:10,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:10,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:10,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:09:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 19:09:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:11,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:09:11,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:09:11,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:09:11,853 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 37 [2021-10-21 19:09:11,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:09:11,862 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 31 treesize of output 31 [2021-10-21 19:09:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:12,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621609283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:12,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:12,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-10-21 19:09:12,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655960866] [2021-10-21 19:09:12,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:09:12,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:09:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:09:12,111 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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) [2021-10-21 19:09:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:13,397 INFO L93 Difference]: Finished difference Result 233 states and 256 transitions. [2021-10-21 19:09:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:09:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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 [2021-10-21 19:09:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:13,400 INFO L225 Difference]: With dead ends: 233 [2021-10-21 19:09:13,400 INFO L226 Difference]: Without dead ends: 233 [2021-10-21 19:09:13,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 820.7ms TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:09:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-21 19:09:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-10-21 19:09:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 193 states have (on average 1.2538860103626943) internal successors, (242), 212 states have internal predecessors, (242), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:09:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 245 transitions. [2021-10-21 19:09:13,408 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 245 transitions. Word has length 36 [2021-10-21 19:09:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:13,408 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 245 transitions. [2021-10-21 19:09:13,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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) [2021-10-21 19:09:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 245 transitions. [2021-10-21 19:09:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:09:13,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:13,410 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:09:13,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:13,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:09:13,630 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:09:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash 606496624, now seen corresponding path program 1 times [2021-10-21 19:09:13,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:13,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251744630] [2021-10-21 19:09:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:13,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:14,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:14,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:14,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251744630] [2021-10-21 19:09:14,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251744630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:14,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677956607] [2021-10-21 19:09:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:14,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:14,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:14,019 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:14,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:09:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:14,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-21 19:09:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:14,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:09:14,747 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:09:14,747 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 [2021-10-21 19:09:14,799 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 [2021-10-21 19:09:14,950 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:09:14,951 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 44 treesize of output 20 [2021-10-21 19:09:14,986 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:09:14,987 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 [2021-10-21 19:09:15,121 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-10-21 19:09:15,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 41 [2021-10-21 19:09:15,214 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-21 19:09:15,215 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 34 [2021-10-21 19:09:15,265 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-21 19:09:15,266 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 50 [2021-10-21 19:09:15,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:09:15,552 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 92 treesize of output 84 [2021-10-21 19:09:15,908 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-21 19:09:15,909 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 40 [2021-10-21 19:09:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:19,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677956607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:19,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:19,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2021-10-21 19:09:19,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146302582] [2021-10-21 19:09:19,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:09:19,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:09:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=907, Unknown=1, NotChecked=0, Total=1056 [2021-10-21 19:09:19,364 INFO L87 Difference]: Start difference. First operand 216 states and 245 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-10-21 19:09:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:44,939 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2021-10-21 19:09:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 19:09:44,939 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 [2021-10-21 19:09:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:44,941 INFO L225 Difference]: With dead ends: 285 [2021-10-21 19:09:44,942 INFO L226 Difference]: Without dead ends: 285 [2021-10-21 19:09:44,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 23960.9ms TimeCoverageRelationStatistics Valid=586, Invalid=2947, Unknown=7, NotChecked=0, Total=3540 [2021-10-21 19:09:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-21 19:09:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 220. [2021-10-21 19:09:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 197 states have (on average 1.2588832487309645) internal successors, (248), 216 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:09:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 251 transitions. [2021-10-21 19:09:44,951 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 251 transitions. Word has length 36 [2021-10-21 19:09:44,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:44,952 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 251 transitions. [2021-10-21 19:09:44,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-10-21 19:09:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 251 transitions. [2021-10-21 19:09:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:09:44,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:44,953 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:09:44,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:45,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:09:45,181 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:09:45,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash 606496625, now seen corresponding path program 1 times [2021-10-21 19:09:45,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:45,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116850960] [2021-10-21 19:09:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:45,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:45,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:45,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116850960] [2021-10-21 19:09:45,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116850960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:45,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138757014] [2021-10-21 19:09:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:45,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:45,686 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:45,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:09:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-21 19:09:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:09:46,684 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:09:46,687 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 [2021-10-21 19:09:46,696 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 [2021-10-21 19:09:46,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:09:46,775 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 [2021-10-21 19:09:47,041 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:09:47,042 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 53 treesize of output 25 [2021-10-21 19:09:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:09:47,055 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 27 treesize of output 11 [2021-10-21 19:09:47,102 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:09:47,102 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 72 treesize of output 50 [2021-10-21 19:09:47,115 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:09:47,115 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 [2021-10-21 19:09:47,332 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 19:09:47,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-21 19:09:47,370 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-21 19:09:47,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 22 [2021-10-21 19:09:47,504 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-21 19:09:47,505 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 67 [2021-10-21 19:09:47,523 INFO L354 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-10-21 19:09:47,523 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 74 treesize of output 61 [2021-10-21 19:09:47,594 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-21 19:09:47,594 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 81 treesize of output 70 [2021-10-21 19:09:47,615 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-10-21 19:09:47,616 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 102 treesize of output 104 [2021-10-21 19:09:48,394 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-10-21 19:09:48,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 70 [2021-10-21 19:09:48,416 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-10-21 19:09:48,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 41 [2021-10-21 19:09:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:48,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138757014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:48,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:48,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2021-10-21 19:09:48,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15344897] [2021-10-21 19:09:48,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:09:48,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:48,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:09:48,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:09:48,589 INFO L87 Difference]: Start difference. First operand 220 states and 251 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-10-21 19:09:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:51,181 INFO L93 Difference]: Finished difference Result 265 states and 292 transitions. [2021-10-21 19:09:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:09:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 [2021-10-21 19:09:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:51,183 INFO L225 Difference]: With dead ends: 265 [2021-10-21 19:09:51,183 INFO L226 Difference]: Without dead ends: 265 [2021-10-21 19:09:51,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1854.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 19:09:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-10-21 19:09:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 219. [2021-10-21 19:09:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 196 states have (on average 1.2551020408163265) internal successors, (246), 215 states have internal predecessors, (246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:09:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 249 transitions. [2021-10-21 19:09:51,191 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 249 transitions. Word has length 36 [2021-10-21 19:09:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:51,191 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 249 transitions. [2021-10-21 19:09:51,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 32 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) [2021-10-21 19:09:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 249 transitions. [2021-10-21 19:09:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:09:51,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:51,193 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] [2021-10-21 19:09:51,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:51,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:51,421 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:09:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash -668642533, now seen corresponding path program 1 times [2021-10-21 19:09:51,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:51,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947150014] [2021-10-21 19:09:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:51,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:09:51,453 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:09:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:09:51,541 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:09:51,542 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:09:51,543 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr44ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:09:51,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:09:51,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:09:51,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:09:51,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:09:51,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 19:09:51,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 19:09:51,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 19:09:51,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 19:09:51,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 19:09:51,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-21 19:09:51,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-21 19:09:51,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 19:09:51,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 19:09:51,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 19:09:51,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-21 19:09:51,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-21 19:09:51,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-21 19:09:51,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-21 19:09:51,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-21 19:09:51,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-21 19:09:51,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-21 19:09:51,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-21 19:09:51,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-21 19:09:51,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-21 19:09:51,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-21 19:09:51,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-21 19:09:51,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-21 19:09:51,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-21 19:09:51,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-21 19:09:51,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-21 19:09:51,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-21 19:09:51,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-21 19:09:51,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-21 19:09:51,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-21 19:09:51,554 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-21 19:09:51,554 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-21 19:09:51,554 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:09:51,554 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-21 19:09:51,555 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-21 19:09:51,555 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-21 19:09:51,555 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-21 19:09:51,555 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:09:51,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:09:51,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:09:51,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 19:09:51,571 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:09:51,600 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-21 19:09:51,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:09:51 BoogieIcfgContainer [2021-10-21 19:09:51,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:09:51,625 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:09:51,625 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:09:51,626 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:09:51,626 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:08:05" (3/4) ... [2021-10-21 19:09:51,631 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:09:51,631 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:09:51,632 INFO L168 Benchmark]: Toolchain (without parser) took 107190.69 ms. Allocated memory was 90.2 MB in the beginning and 180.4 MB in the end (delta: 90.2 MB). Free memory was 52.1 MB in the beginning and 95.1 MB in the end (delta: -42.9 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:09:51,632 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory was 69.7 MB in the beginning and 69.6 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:09:51,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 520.46 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 51.9 MB in the beginning and 88.6 MB in the end (delta: -36.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:09:51,633 INFO L168 Benchmark]: Boogie Preprocessor took 60.12 ms. Allocated memory is still 119.5 MB. Free memory was 88.6 MB in the beginning and 86.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:09:51,634 INFO L168 Benchmark]: RCFGBuilder took 816.57 ms. Allocated memory is still 119.5 MB. Free memory was 86.0 MB in the beginning and 61.4 MB in the end (delta: 24.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:09:51,634 INFO L168 Benchmark]: TraceAbstraction took 105781.28 ms. Allocated memory was 119.5 MB in the beginning and 180.4 MB in the end (delta: 60.8 MB). Free memory was 60.8 MB in the beginning and 95.1 MB in the end (delta: -34.2 MB). Peak memory consumption was 98.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:09:51,634 INFO L168 Benchmark]: Witness Printer took 5.85 ms. Allocated memory is still 180.4 MB. Free memory is still 95.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:09:51,636 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory was 69.7 MB in the beginning and 69.6 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 520.46 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 51.9 MB in the beginning and 88.6 MB in the end (delta: -36.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.12 ms. Allocated memory is still 119.5 MB. Free memory was 88.6 MB in the beginning and 86.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 816.57 ms. Allocated memory is still 119.5 MB. Free memory was 86.0 MB in the beginning and 61.4 MB in the end (delta: 24.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 105781.28 ms. Allocated memory was 119.5 MB in the beginning and 180.4 MB in the end (delta: 60.8 MB). Free memory was 60.8 MB in the beginning and 95.1 MB in the end (delta: -34.2 MB). Peak memory consumption was 98.4 MB. Max. memory is 16.1 GB. * Witness Printer took 5.85 ms. Allocated memory is still 180.4 MB. Free memory is still 95.1 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: 996]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 996. Possible FailurePath: [L999] SLL* head = malloc(sizeof(SLL)); [L1000] head->next = ((void*)0) VAL [head={-2:0}] [L1001] head->data = 0 VAL [head={-2:0}] [L1003] SLL* x = head; VAL [head={-2:0}, x={-2:0}] [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1025] x = head VAL [head={-2:0}, x={-2:0}] [L1026] x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}] [L1026] COND FALSE !(x->next) [L1033] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}] [L1033] SLL* y = x->next; [L1034] x->next = malloc(sizeof(SLL)) VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}, y={0:0}] [L1035] x->data = 1 VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1036] x->next = y VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1040] x = head VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1043] EXPR x->data VAL [head={-2:0}, x={-2:0}, x->data=1, y={0:0}] [L1043] COND FALSE !(x->data != 1) [L1049] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}, y={0:0}] [L1049] x = x->next [L1050] COND FALSE !(\read(*x)) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1058] x = head VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1059] COND TRUE x != ((void*)0) [L1061] head = x VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1062] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}, y={0:0}] [L1062] x = x->next [L1063] free(head) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1063] free(head) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1063] free(head) [L1059] COND FALSE !(x != ((void*)0)) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1066] return 0; VAL [\result=0, head={-2:0}, x={0:0}, y={0:0}] - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: 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: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: 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: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: 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: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: 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: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: 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: 1053]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed 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: 1062]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: 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, 107 locations, 45 error locations. Started 1 CEGAR loops. OverallTime: 105603.9ms, OverallIterations: 31, TraceHistogramMax: 3, EmptinessCheckTime: 46.4ms, AutomataDifference: 69876.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1689 SDtfs, 6143 SDslu, 8927 SDs, 0 SdLazy, 23025 SolverSat, 1741 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 30789.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1078 GetRequests, 363 SyntacticMatches, 21 SemanticMatches, 694 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 45875.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=29, InterpolantAutomatonStates: 479, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 253.0ms AutomataMinimizationTime, 30 MinimizatonAttempts, 1056 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 205.5ms SsaConstructionTime, 938.9ms SatisfiabilityAnalysisTime, 24977.8ms InterpolantComputationTime, 1247 NumberOfCodeBlocks, 1247 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1166 ConstructedInterpolants, 103 QuantifiedInterpolants, 18726 SizeOfPredicates, 198 NumberOfNonLiveVariables, 2737 ConjunctsInSsa, 548 ConjunctsInUnsatCore, 44 InterpolantComputations, 16 PerfectInterpolantSequences, 22/134 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 19:09:51,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/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-e943c26 [2021-10-21 19:09:54,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:09:54,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:09:54,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:09:54,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:09:54,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:09:54,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:09:54,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:09:54,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:09:54,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:09:54,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:09:54,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:09:54,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:09:54,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:09:54,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:09:54,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:09:54,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:09:54,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:09:54,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:09:54,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:09:54,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:09:54,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:09:54,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:09:54,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:09:54,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:09:54,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:09:54,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:09:54,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:09:54,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:09:54,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:09:54,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:09:54,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:09:54,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:09:54,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:09:54,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:09:54,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:09:54,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:09:54,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:09:54,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:09:54,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:09:54,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:09:54,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-21 19:09:54,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:09:54,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:09:54,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:09:54,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:09:54,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:09:54,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:09:54,769 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:09:54,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:09:54,771 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:09:54,771 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:09:54,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:09:54,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:09:54,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:09:54,773 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:09:54,774 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:09:54,774 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:09:54,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:09:54,775 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:09:54,775 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:09:54,775 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:09:54,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:09:54,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:09:54,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:09:54,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:09:54,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:09:54,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:09:54,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:09:54,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:09:54,778 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:09:54,779 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:09:54,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:09:54,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:09:54,780 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_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2021-10-21 19:09:55,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:09:55,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:09:55,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:09:55,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:09:55,292 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:09:55,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-10-21 19:09:55,368 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data/cb389b8e1/7637c328c0064a9bb5e1932a10576b32/FLAG59b503401 [2021-10-21 19:09:56,204 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:09:56,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-10-21 19:09:56,233 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data/cb389b8e1/7637c328c0064a9bb5e1932a10576b32/FLAG59b503401 [2021-10-21 19:09:56,449 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/data/cb389b8e1/7637c328c0064a9bb5e1932a10576b32 [2021-10-21 19:09:56,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:09:56,456 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:09:56,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:09:56,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:09:56,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:09:56,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:09:56" (1/1) ... [2021-10-21 19:09:56,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d8d856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:56, skipping insertion in model container [2021-10-21 19:09:56,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:09:56" (1/1) ... [2021-10-21 19:09:56,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:09:56,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:09:56,954 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_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-10-21 19:09:56,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:09:56,990 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:09:57,097 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_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-10-21 19:09:57,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:09:57,154 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:09:57,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57 WrapperNode [2021-10-21 19:09:57,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:09:57,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:09:57,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:09:57,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:09:57,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:09:57,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:09:57,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:09:57,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:09:57,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:09:57,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:57,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:09:57,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:09:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:09:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:09:57,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:09:57,400 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:09:57,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:09:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:09:57,403 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:09:57,404 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:09:57,404 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:09:57,404 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:09:57,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:09:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:09:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:09:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:09:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:09:57,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:09:57,406 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:09:57,406 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:09:57,406 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:09:57,406 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:09:57,406 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:09:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:09:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:09:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:09:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:09:57,407 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:09:57,408 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:09:57,408 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:09:57,408 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:09:57,409 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:09:57,409 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:09:57,409 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:09:57,409 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:09:57,410 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:09:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:09:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:09:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:09:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:09:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:09:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:09:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:09:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:09:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:09:57,416 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:09:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:09:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:09:57,417 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:09:57,418 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:09:57,418 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:09:57,419 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:09:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:09:57,420 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:09:57,421 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:09:57,422 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:09:57,423 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:09:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:09:57,424 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:09:57,425 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:09:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:09:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:09:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:09:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:09:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:09:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:09:57,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:09:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 19:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:09:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 19:09:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:09:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:09:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:09:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:09:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-21 19:09:57,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 19:09:57,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 19:09:58,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:09:58,567 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-21 19:09:58,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:09:58 BoogieIcfgContainer [2021-10-21 19:09:58,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:09:58,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:09:58,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:09:58,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:09:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:09:56" (1/3) ... [2021-10-21 19:09:58,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c4b18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:09:58, skipping insertion in model container [2021-10-21 19:09:58,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (2/3) ... [2021-10-21 19:09:58,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c4b18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:09:58, skipping insertion in model container [2021-10-21 19:09:58,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:09:58" (3/3) ... [2021-10-21 19:09:58,591 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2021-10-21 19:09:58,598 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:09:58,599 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-21 19:09:58,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:09:58,679 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:09:58,680 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-21 19:09:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 52 states have (on average 2.173076923076923) internal successors, (113), 97 states have internal predecessors, (113), 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) [2021-10-21 19:09:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 19:09:58,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:58,727 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:09:58,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:09:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash 891998390, now seen corresponding path program 1 times [2021-10-21 19:09:58,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:09:58,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541099023] [2021-10-21 19:09:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:58,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:09:58,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:09:58,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:09:58,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:09:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:58,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:09:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:59,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:09:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:59,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:09:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:59,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:09:59,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541099023] [2021-10-21 19:09:59,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541099023] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:09:59,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:09:59,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:09:59,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429020022] [2021-10-21 19:09:59,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:09:59,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:09:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:09:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:09:59,164 INFO L87 Difference]: Start difference. First operand has 102 states, 52 states have (on average 2.173076923076923) internal successors, (113), 97 states have internal predecessors, (113), 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) [2021-10-21 19:09:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:59,492 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2021-10-21 19:09:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:09:59,495 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 [2021-10-21 19:09:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:59,506 INFO L225 Difference]: With dead ends: 129 [2021-10-21 19:09:59,507 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 19:09:59,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:09:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 19:09:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-10-21 19:09:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 50 states have (on average 1.98) internal successors, (99), 92 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:09:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-10-21 19:09:59,555 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 7 [2021-10-21 19:09:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:59,556 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-10-21 19:09:59,557 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) [2021-10-21 19:09:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-10-21 19:09:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 19:09:59,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:59,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:09:59,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-21 19:09:59,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:09:59,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:09:59,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:59,773 INFO L82 PathProgramCache]: Analyzing trace with hash 891998391, now seen corresponding path program 1 times [2021-10-21 19:09:59,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:09:59,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538307151] [2021-10-21 19:09:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:59,775 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:09:59,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:09:59,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:09:59,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:09:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:59,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:09:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:00,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:10:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:00,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:00,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:00,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538307151] [2021-10-21 19:10:00,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538307151] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:00,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:00,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-21 19:10:00,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454763] [2021-10-21 19:10:00,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:00,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:00,160 INFO L87 Difference]: Start difference. First operand 96 states and 102 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) [2021-10-21 19:10:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:00,665 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2021-10-21 19:10:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:10:00,667 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 [2021-10-21 19:10:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:00,669 INFO L225 Difference]: With dead ends: 123 [2021-10-21 19:10:00,669 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 19:10:00,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 19:10:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-10-21 19:10:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 50 states have (on average 1.94) internal successors, (97), 90 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-10-21 19:10:00,683 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 7 [2021-10-21 19:10:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:00,684 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-10-21 19:10:00,684 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) [2021-10-21 19:10:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-10-21 19:10:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:10:00,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:00,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:00,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:00,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:00,903 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:00,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:00,904 INFO L82 PathProgramCache]: Analyzing trace with hash 222948282, now seen corresponding path program 1 times [2021-10-21 19:10:00,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:00,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476762827] [2021-10-21 19:10:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:00,906 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:00,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:00,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:00,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:10:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:01,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:10:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:01,202 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 [2021-10-21 19:10:01,319 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-21 19:10:01,322 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 [2021-10-21 19:10:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:01,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:01,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:01,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476762827] [2021-10-21 19:10:01,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476762827] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:01,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:01,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 19:10:01,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475437269] [2021-10-21 19:10:01,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:10:01,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:01,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:10:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:10:01,531 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:02,018 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-10-21 19:10:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:10:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-10-21 19:10:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:02,021 INFO L225 Difference]: With dead ends: 97 [2021-10-21 19:10:02,021 INFO L226 Difference]: Without dead ends: 97 [2021-10-21 19:10:02,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-21 19:10:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2021-10-21 19:10:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 85 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-10-21 19:10:02,031 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 11 [2021-10-21 19:10:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:02,032 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-10-21 19:10:02,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-10-21 19:10:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:10:02,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:02,037 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:02,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:02,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:02,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash 222948283, now seen corresponding path program 1 times [2021-10-21 19:10:02,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:02,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502106058] [2021-10-21 19:10:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:02,254 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:02,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:02,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:02,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:10:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:10:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:02,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:10:02,565 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:10:02,582 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 [2021-10-21 19:10:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:02,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:03,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:03,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502106058] [2021-10-21 19:10:03,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502106058] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:03,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:03,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-10-21 19:10:03,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221552746] [2021-10-21 19:10:03,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:10:03,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:03,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:10:03,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:10:03,047 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:04,129 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-10-21 19:10:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:10:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:10:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:04,132 INFO L225 Difference]: With dead ends: 113 [2021-10-21 19:10:04,132 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 19:10:04,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:10:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 19:10:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2021-10-21 19:10:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 91 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2021-10-21 19:10:04,142 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 11 [2021-10-21 19:10:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:04,143 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2021-10-21 19:10:04,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2021-10-21 19:10:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:10:04,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:04,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:04,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:04,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:04,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:04,360 INFO L82 PathProgramCache]: Analyzing trace with hash 983785532, now seen corresponding path program 1 times [2021-10-21 19:10:04,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:04,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706658402] [2021-10-21 19:10:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:04,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:04,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:04,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:04,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 19:10:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:04,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:10:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:04,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:10:04,636 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 [2021-10-21 19:10:04,672 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 [2021-10-21 19:10:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:04,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:04,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:04,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706658402] [2021-10-21 19:10:04,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706658402] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:04,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:04,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-21 19:10:04,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40022859] [2021-10-21 19:10:04,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:10:04,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:04,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:10:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:10:04,830 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:05,442 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-10-21 19:10:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:10:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 19:10:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:05,444 INFO L225 Difference]: With dead ends: 95 [2021-10-21 19:10:05,444 INFO L226 Difference]: Without dead ends: 95 [2021-10-21 19:10:05,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:10:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-21 19:10:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-10-21 19:10:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.4714285714285715) internal successors, (103), 90 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2021-10-21 19:10:05,455 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 15 [2021-10-21 19:10:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:05,455 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2021-10-21 19:10:05,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2021-10-21 19:10:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:10:05,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:05,457 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:05,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:05,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:05,671 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash 983785533, now seen corresponding path program 1 times [2021-10-21 19:10:05,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:05,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229332969] [2021-10-21 19:10:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:05,673 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:05,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:05,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:05,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 19:10:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:05,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:10:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:05,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:10:05,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:10:05,970 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 [2021-10-21 19:10:06,046 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 [2021-10-21 19:10:06,069 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 [2021-10-21 19:10:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:06,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:06,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:06,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229332969] [2021-10-21 19:10:06,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229332969] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:06,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:06,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-21 19:10:06,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837421845] [2021-10-21 19:10:06,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:10:06,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:06,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:10:06,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:10:06,526 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:08,151 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-10-21 19:10:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:10:08,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 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 [2021-10-21 19:10:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:08,153 INFO L225 Difference]: With dead ends: 96 [2021-10-21 19:10:08,153 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:10:08,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 461.9ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:10:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:10:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2021-10-21 19:10:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 85 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-10-21 19:10:08,163 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 15 [2021-10-21 19:10:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:08,164 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-10-21 19:10:08,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-10-21 19:10:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:10:08,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:08,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:08,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:08,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:08,381 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1308029040, now seen corresponding path program 1 times [2021-10-21 19:10:08,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:08,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125898577] [2021-10-21 19:10:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:08,383 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:08,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:08,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:08,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 19:10:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:08,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:10:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:10:08,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:10:08,702 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:10:08,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-21 19:10:08,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:10:08,714 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 27 treesize of output 11 [2021-10-21 19:10:08,789 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 [2021-10-21 19:10:08,795 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 [2021-10-21 19:10:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:08,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:08,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:08,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125898577] [2021-10-21 19:10:08,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125898577] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:08,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:08,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-21 19:10:08,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015155212] [2021-10-21 19:10:08,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:10:08,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:08,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:10:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:10:08,976 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:09,430 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2021-10-21 19:10:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:10:09,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 19:10:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:09,432 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:10:09,432 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:10:09,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:10:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:10:09,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-10-21 19:10:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 89 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-10-21 19:10:09,440 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 17 [2021-10-21 19:10:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:09,440 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-10-21 19:10:09,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-10-21 19:10:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:10:09,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:09,442 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] [2021-10-21 19:10:09,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:09,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:09,658 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash 158378837, now seen corresponding path program 1 times [2021-10-21 19:10:09,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:09,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125776926] [2021-10-21 19:10:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:09,660 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:09,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:09,666 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:09,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 19:10:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:09,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:10:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:10,005 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 [2021-10-21 19:10:10,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:10:10,048 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 [2021-10-21 19:10:10,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:10:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:10,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:10,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:10,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125776926] [2021-10-21 19:10:10,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125776926] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:10,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:10,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-10-21 19:10:10,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164246215] [2021-10-21 19:10:10,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:10:10,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:10,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:10:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:10:10,309 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-10-21 19:10:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:10,882 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2021-10-21 19:10:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:10:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 20 [2021-10-21 19:10:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:10,884 INFO L225 Difference]: With dead ends: 123 [2021-10-21 19:10:10,884 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 19:10:10,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:10:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 19:10:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-10-21 19:10:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2021-10-21 19:10:10,891 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 20 [2021-10-21 19:10:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:10,891 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2021-10-21 19:10:10,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-10-21 19:10:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2021-10-21 19:10:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:10:10,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:10,894 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] [2021-10-21 19:10:10,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:11,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:11,105 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:11,106 INFO L82 PathProgramCache]: Analyzing trace with hash 613145829, now seen corresponding path program 1 times [2021-10-21 19:10:11,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:11,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457924204] [2021-10-21 19:10:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:11,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:11,108 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:11,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-21 19:10:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:11,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:10:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:11,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:10:11,411 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-21 19:10:11,413 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 [2021-10-21 19:10:11,490 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 31 treesize of output 27 [2021-10-21 19:10:11,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-10-21 19:10:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:11,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:12,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:12,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457924204] [2021-10-21 19:10:12,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457924204] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:12,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:12,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-10-21 19:10:12,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448182553] [2021-10-21 19:10:12,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:10:12,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:12,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:10:12,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:10:12,023 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:13,294 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2021-10-21 19:10:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:10:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 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 21 [2021-10-21 19:10:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:13,295 INFO L225 Difference]: With dead ends: 127 [2021-10-21 19:10:13,295 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:10:13,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:10:13,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:10:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-10-21 19:10:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 96 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2021-10-21 19:10:13,302 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 21 [2021-10-21 19:10:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:13,303 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2021-10-21 19:10:13,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 12 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2021-10-21 19:10:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:10:13,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:13,305 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] [2021-10-21 19:10:13,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:13,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:13,509 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:13,509 INFO L82 PathProgramCache]: Analyzing trace with hash 613145830, now seen corresponding path program 1 times [2021-10-21 19:10:13,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:13,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909698760] [2021-10-21 19:10:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:13,511 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:13,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:13,511 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:13,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-21 19:10:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:10:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:13,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:10:13,882 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:10:13,882 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 [2021-10-21 19:10:13,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:10:13,964 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 [2021-10-21 19:10:14,112 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 36 treesize of output 28 [2021-10-21 19:10:14,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-21 19:10:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,117 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:15,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909698760] [2021-10-21 19:10:15,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909698760] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:15,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:15,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-21 19:10:15,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733229052] [2021-10-21 19:10:15,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:10:15,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:10:15,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:10:15,121 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:17,157 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-10-21 19:10:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:10:17,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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 21 [2021-10-21 19:10:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:17,159 INFO L225 Difference]: With dead ends: 149 [2021-10-21 19:10:17,159 INFO L226 Difference]: Without dead ends: 149 [2021-10-21 19:10:17,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1012.3ms TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:10:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-21 19:10:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2021-10-21 19:10:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 98 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2021-10-21 19:10:17,165 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 21 [2021-10-21 19:10:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:17,166 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2021-10-21 19:10:17,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2021-10-21 19:10:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:10:17,168 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:17,168 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] [2021-10-21 19:10:17,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:17,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:17,382 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash 822626090, now seen corresponding path program 1 times [2021-10-21 19:10:17,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:17,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280507457] [2021-10-21 19:10:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:17,383 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:17,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:17,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:17,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-21 19:10:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:17,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:10:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:17,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:10:17,712 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 [2021-10-21 19:10:17,779 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:10:17,780 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 [2021-10-21 19:10:17,819 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 [2021-10-21 19:10:17,896 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 60 treesize of output 56 [2021-10-21 19:10:17,960 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-21 19:10:17,960 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 57 treesize of output 48 [2021-10-21 19:10:17,970 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 42 treesize of output 38 [2021-10-21 19:10:18,172 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 49 treesize of output 37 [2021-10-21 19:10:18,177 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 34 treesize of output 26 [2021-10-21 19:10:18,425 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:10:18,425 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 32 treesize of output 14 [2021-10-21 19:10:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:18,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:37,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0.base_91 (_ BitVec 32))) (or (forall ((main_~x~0.offset (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (not (= (select (select (store |c_#memory_int| v_main_~x~0.base_91 (store (store (select |c_#memory_int| v_main_~x~0.base_91) (bvadd (_ bv4 32) main_~x~0.offset) (_ bv1 32)) main_~x~0.offset v_DerPreprocessor_4)) c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset)) (_ bv1 32)))) (not (= (_ bv0 1) (select |c_#valid| v_main_~x~0.base_91))))) is different from false [2021-10-21 19:10:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:37,164 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:37,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280507457] [2021-10-21 19:10:37,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280507457] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:37,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:37,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 19 [2021-10-21 19:10:37,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113553179] [2021-10-21 19:10:37,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:10:37,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:10:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=258, Unknown=6, NotChecked=32, Total=342 [2021-10-21 19:10:37,167 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:46,676 INFO L93 Difference]: Finished difference Result 167 states and 185 transitions. [2021-10-21 19:10:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:10:46,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 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 [2021-10-21 19:10:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:46,678 INFO L225 Difference]: With dead ends: 167 [2021-10-21 19:10:46,678 INFO L226 Difference]: Without dead ends: 167 [2021-10-21 19:10:46,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 25613.5ms TimeCoverageRelationStatistics Valid=122, Invalid=629, Unknown=9, NotChecked=52, Total=812 [2021-10-21 19:10:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-21 19:10:46,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 113. [2021-10-21 19:10:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.3695652173913044) internal successors, (126), 109 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) [2021-10-21 19:10:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-10-21 19:10:46,686 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 23 [2021-10-21 19:10:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:46,686 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-10-21 19:10:46,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:10:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-10-21 19:10:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:10:46,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:46,689 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] [2021-10-21 19:10:46,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:46,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:46,901 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash -269223688, now seen corresponding path program 1 times [2021-10-21 19:10:46,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:46,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478859670] [2021-10-21 19:10:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:46,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:46,903 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:46,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-21 19:10:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:10:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:47,228 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 [2021-10-21 19:10:47,275 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 16 treesize of output 8 [2021-10-21 19:10:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:47,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:10:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:47,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:10:47,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478859670] [2021-10-21 19:10:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478859670] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:47,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:47,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-21 19:10:47,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717096055] [2021-10-21 19:10:47,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:10:47,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:10:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:10:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:10:47,406 INFO L87 Difference]: Start difference. First operand 113 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) [2021-10-21 19:10:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:10:47,965 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2021-10-21 19:10:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:10:47,966 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 24 [2021-10-21 19:10:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:10:47,967 INFO L225 Difference]: With dead ends: 153 [2021-10-21 19:10:47,967 INFO L226 Difference]: Without dead ends: 153 [2021-10-21 19:10:47,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:10:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-21 19:10:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2021-10-21 19:10:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.3369565217391304) internal successors, (123), 109 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) [2021-10-21 19:10:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2021-10-21 19:10:47,973 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 24 [2021-10-21 19:10:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:10:47,973 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2021-10-21 19:10:47,974 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) [2021-10-21 19:10:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2021-10-21 19:10:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:10:47,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:10:47,975 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] [2021-10-21 19:10:48,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-21 19:10:48,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:10:48,212 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:10:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1777986568, now seen corresponding path program 1 times [2021-10-21 19:10:48,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:10:48,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494892260] [2021-10-21 19:10:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:48,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:10:48,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:10:48,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:10:48,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-21 19:10:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:48,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:10:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:48,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:10:48,681 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-21 19:10:48,682 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 [2021-10-21 19:10:48,763 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 [2021-10-21 19:10:49,035 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:10:49,035 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 26 [2021-10-21 19:10:49,119 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:10:49,120 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 [2021-10-21 19:10:49,438 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:10:49,438 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 60 treesize of output 43 [2021-10-21 19:10:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:49,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:11:10,466 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 582 treesize of output 574 [2021-10-21 19:11:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:31,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:11:31,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494892260] [2021-10-21 19:11:31,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494892260] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:11:31,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:31,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-10-21 19:11:31,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459661226] [2021-10-21 19:11:31,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:11:31,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:11:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:11:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=408, Unknown=11, NotChecked=0, Total=506 [2021-10-21 19:11:31,532 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:11:59,151 WARN L207 SmtUtils]: Spent 18.13 s on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-10-21 19:12:17,607 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((main_~x~0.offset (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| c_main_~x~0.base) (bvadd (_ bv4 32) main_~x~0.offset) v_DerPreprocessor_5) main_~x~0.offset (_ bv0 32))) c_main_~head~0.base) c_main_~head~0.offset))))))))))) (_ bv1 1)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_main_~x~0.base (store (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset (_ bv0 32))) c_main_~head~0.base) c_main_~head~0.offset))))))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~head~0.base))))) (_ bv1 1)))) is different from false [2021-10-21 19:12:32,502 WARN L207 SmtUtils]: Spent 11.29 s on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-10-21 19:12:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:32,926 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2021-10-21 19:12:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:12:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 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 [2021-10-21 19:12:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:32,928 INFO L225 Difference]: With dead ends: 175 [2021-10-21 19:12:32,928 INFO L226 Difference]: Without dead ends: 175 [2021-10-21 19:12:32,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 87230.3ms TimeCoverageRelationStatistics Valid=371, Invalid=1340, Unknown=15, NotChecked=80, Total=1806 [2021-10-21 19:12:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-21 19:12:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 127. [2021-10-21 19:12:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 106 states have (on average 1.3396226415094339) internal successors, (142), 123 states have internal predecessors, (142), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2021-10-21 19:12:32,935 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 24 [2021-10-21 19:12:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:32,936 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2021-10-21 19:12:32,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:12:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2021-10-21 19:12:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:12:32,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:32,938 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] [2021-10-21 19:12:32,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-21 19:12:33,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:12:33,153 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:12:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1777986567, now seen corresponding path program 1 times [2021-10-21 19:12:33,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:12:33,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870274881] [2021-10-21 19:12:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:33,154 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:12:33,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:12:33,156 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:12:33,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-21 19:12:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:33,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:12:33,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:33,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:12:33,739 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:12:33,739 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 20 treesize of output 20 [2021-10-21 19:12:33,760 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 [2021-10-21 19:12:33,824 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 [2021-10-21 19:12:33,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:12:34,124 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:12:34,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2021-10-21 19:12:34,140 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 27 treesize of output 11 [2021-10-21 19:12:34,213 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:12:34,214 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 63 treesize of output 45 [2021-10-21 19:12:34,238 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:12:34,238 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 55 treesize of output 50 [2021-10-21 19:12:34,646 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:12:34,646 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 61 treesize of output 40 [2021-10-21 19:12:34,668 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:12:34,669 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 31 treesize of output 19 [2021-10-21 19:12:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:34,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:13:30,305 WARN L207 SmtUtils]: Spent 5.22 s on a formula simplification that was a NOOP. DAG size: 42 [2021-10-21 19:13:30,333 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 638 treesize of output 606 [2021-10-21 19:13:31,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:31,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:31,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:31,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:31,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:31,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:33,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:13:33,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870274881] [2021-10-21 19:13:33,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870274881] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:13:33,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:13:33,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-10-21 19:13:33,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234687574] [2021-10-21 19:13:33,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:13:33,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:13:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:13:33,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=431, Unknown=12, NotChecked=0, Total=506 [2021-10-21 19:13:33,485 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:14:22,391 WARN L207 SmtUtils]: Spent 40.76 s on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-10-21 19:15:06,158 WARN L207 SmtUtils]: Spent 25.52 s on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-10-21 19:15:42,357 WARN L207 SmtUtils]: Spent 19.55 s on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-10-21 19:15:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:15:43,721 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2021-10-21 19:15:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:15:43,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 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 [2021-10-21 19:15:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:15:43,723 INFO L225 Difference]: With dead ends: 185 [2021-10-21 19:15:43,723 INFO L226 Difference]: Without dead ends: 185 [2021-10-21 19:15:43,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 164488.1ms TimeCoverageRelationStatistics Valid=323, Invalid=1551, Unknown=18, NotChecked=0, Total=1892 [2021-10-21 19:15:43,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-21 19:15:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 126. [2021-10-21 19:15:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 122 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) [2021-10-21 19:15:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2021-10-21 19:15:43,730 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 24 [2021-10-21 19:15:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:15:43,730 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2021-10-21 19:15:43,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:15:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2021-10-21 19:15:43,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:15:43,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:15:43,732 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] [2021-10-21 19:15:43,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:15:43,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:15:43,945 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:15:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:15:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash 220059809, now seen corresponding path program 1 times [2021-10-21 19:15:43,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:15:43,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397900064] [2021-10-21 19:15:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:15:43,946 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:15:43,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:15:43,947 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:15:43,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-21 19:15:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:15:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:15:44,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:15:44,399 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 [2021-10-21 19:15:44,461 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 19:15:44,461 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 [2021-10-21 19:15:44,506 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 [2021-10-21 19:15:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:44,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:15:44,631 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 200 treesize of output 188 [2021-10-21 19:15:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:44,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:15:44,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397900064] [2021-10-21 19:15:44,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397900064] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:15:44,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:15:44,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-21 19:15:44,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976086462] [2021-10-21 19:15:44,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:15:44,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:15:44,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:15:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:15:44,851 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:15:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:15:45,611 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2021-10-21 19:15:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:15:45,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 [2021-10-21 19:15:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:15:45,614 INFO L225 Difference]: With dead ends: 166 [2021-10-21 19:15:45,614 INFO L226 Difference]: Without dead ends: 166 [2021-10-21 19:15:45,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:15:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-21 19:15:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2021-10-21 19:15:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.3162393162393162) internal successors, (154), 134 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) [2021-10-21 19:15:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2021-10-21 19:15:45,621 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 25 [2021-10-21 19:15:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:15:45,622 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2021-10-21 19:15:45,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:15:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2021-10-21 19:15:45,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:15:45,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:15:45,623 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] [2021-10-21 19:15:45,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:15:45,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:15:45,836 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:15:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:15:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash -211374226, now seen corresponding path program 1 times [2021-10-21 19:15:45,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:15:45,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011910432] [2021-10-21 19:15:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:15:45,836 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:15:45,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:15:45,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:15:45,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-21 19:15:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:15:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:15:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:15:46,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:15:46,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:15:46,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:46,264 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 27 treesize of output 11 [2021-10-21 19:15:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:46,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-21 19:15:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:46,392 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 27 treesize of output 11 [2021-10-21 19:15:46,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:46,405 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 27 treesize of output 11 [2021-10-21 19:15:46,476 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-21 19:15:46,477 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 37 treesize of output 40 [2021-10-21 19:15:46,505 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-21 19:15:46,506 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 42 treesize of output 41 [2021-10-21 19:15:49,499 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-10-21 19:15:49,500 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 68 treesize of output 66 [2021-10-21 19:15:49,900 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 19:15:49,900 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-10-21 19:15:49,918 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-21 19:15:49,918 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 23 [2021-10-21 19:15:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:50,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:15:54,857 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-10-21 19:15:54,858 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 28 treesize of output 23 [2021-10-21 19:15:57,425 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~x~0.base (_ BitVec 32))) (or (and (= c_main_~head~0.offset c_main_~x~0.offset) (= c_main_~head~0.base main_~x~0.base)) (and (forall ((v_DerPreprocessor_9 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| main_~x~0.base) (bvadd (_ bv4 32) c_main_~x~0.offset) v_DerPreprocessor_9) c_main_~x~0.offset c_main_~head~0.offset)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32))) (forall ((v_DerPreprocessor_10 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| main_~x~0.base) (bvadd (_ bv4 32) c_main_~x~0.offset) v_DerPreprocessor_10) c_main_~x~0.offset c_main_~head~0.base)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))))) is different from false [2021-10-21 19:15:59,503 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~x~0.base (_ BitVec 32))) (or (and (= c_main_~head~0.base main_~x~0.base) (= c_main_~head~0.offset (_ bv0 32))) (and (forall ((v_DerPreprocessor_9 (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| main_~x~0.base) (_ bv4 32) v_DerPreprocessor_9) (_ bv0 32) c_main_~head~0.offset)) c_main_~head~0.base) c_main_~head~0.offset))) (forall ((v_DerPreprocessor_10 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| main_~x~0.base) (_ bv4 32) v_DerPreprocessor_10) (_ bv0 32) c_main_~head~0.base)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))))) is different from false [2021-10-21 19:16:01,828 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~x~0.base (_ BitVec 32))) (or (and (forall ((v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_main_~head~0.base (store (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset) v_DerPreprocessor_11)))) (store .cse0 main_~x~0.base (store (store (select .cse0 main_~x~0.base) (_ bv4 32) v_DerPreprocessor_9) (_ bv0 32) c_main_~head~0.offset))) c_main_~head~0.base) c_main_~head~0.offset))) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_main_~head~0.base (store (select |c_#memory_$Pointer$.base| c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset) v_DerPreprocessor_12)))) (store .cse1 main_~x~0.base (store (store (select .cse1 main_~x~0.base) (_ bv4 32) v_DerPreprocessor_10) (_ bv0 32) c_main_~head~0.base))) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))) (and (= c_main_~head~0.base main_~x~0.base) (= c_main_~head~0.offset (_ bv0 32))))) is different from false [2021-10-21 19:16:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:02,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:16:02,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011910432] [2021-10-21 19:16:02,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011910432] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:16:02,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:02,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-10-21 19:16:02,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015062029] [2021-10-21 19:16:02,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:16:02,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:16:02,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:16:02,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=523, Unknown=6, NotChecked=144, Total=756 [2021-10-21 19:16:02,114 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2021-10-21 19:16:04,223 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (forall ((main_~x~0.base (_ BitVec 32))) (or (and (forall ((v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_main_~head~0.base (store (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset) v_DerPreprocessor_11)))) (store .cse0 main_~x~0.base (store (store (select .cse0 main_~x~0.base) (_ bv4 32) v_DerPreprocessor_9) (_ bv0 32) c_main_~head~0.offset))) c_main_~head~0.base) c_main_~head~0.offset))) (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_main_~head~0.base (store (select |c_#memory_$Pointer$.base| c_main_~head~0.base) (bvadd (_ bv4 32) c_main_~head~0.offset) v_DerPreprocessor_12)))) (store .cse1 main_~x~0.base (store (store (select .cse1 main_~x~0.base) (_ bv4 32) v_DerPreprocessor_10) (_ bv0 32) c_main_~head~0.base))) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))) (and (= c_main_~head~0.base main_~x~0.base) (= c_main_~head~0.offset (_ bv0 32))))) (= c_main_~head~0.offset (_ bv0 32))) is different from false [2021-10-21 19:16:06,241 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (forall ((main_~x~0.base (_ BitVec 32))) (or (and (= c_main_~head~0.base main_~x~0.base) (= c_main_~head~0.offset (_ bv0 32))) (and (forall ((v_DerPreprocessor_9 (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| main_~x~0.base) (_ bv4 32) v_DerPreprocessor_9) (_ bv0 32) c_main_~head~0.offset)) c_main_~head~0.base) c_main_~head~0.offset))) (forall ((v_DerPreprocessor_10 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| main_~x~0.base) (_ bv4 32) v_DerPreprocessor_10) (_ bv0 32) c_main_~head~0.base)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))))) (= c_main_~head~0.offset (_ bv0 32))) is different from false [2021-10-21 19:16:08,248 WARN L838 $PredicateComparison]: unable to prove that (and (= c_main_~x~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.base| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)) (forall ((main_~x~0.base (_ BitVec 32))) (or (and (= c_main_~head~0.offset c_main_~x~0.offset) (= c_main_~head~0.base main_~x~0.base)) (and (forall ((v_DerPreprocessor_9 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| main_~x~0.base) (bvadd (_ bv4 32) c_main_~x~0.offset) v_DerPreprocessor_9) c_main_~x~0.offset c_main_~head~0.offset)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32))) (forall ((v_DerPreprocessor_10 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| main_~x~0.base) (bvadd (_ bv4 32) c_main_~x~0.offset) v_DerPreprocessor_10) c_main_~x~0.offset c_main_~head~0.base)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))))) (= c_main_~head~0.offset (_ bv0 32))) is different from false [2021-10-21 19:16:35,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:35,498 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2021-10-21 19:16:35,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:16:35,499 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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 26 [2021-10-21 19:16:35,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:35,500 INFO L225 Difference]: With dead ends: 162 [2021-10-21 19:16:35,500 INFO L226 Difference]: Without dead ends: 162 [2021-10-21 19:16:35,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 26298.7ms TimeCoverageRelationStatistics Valid=214, Invalid=1061, Unknown=9, NotChecked=438, Total=1722 [2021-10-21 19:16:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-21 19:16:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 141. [2021-10-21 19:16:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 120 states have (on average 1.3083333333333333) internal successors, (157), 137 states have internal predecessors, (157), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:16:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-10-21 19:16:35,506 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 26 [2021-10-21 19:16:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:35,506 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-10-21 19:16:35,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2021-10-21 19:16:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-10-21 19:16:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:16:35,508 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:35,508 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] [2021-10-21 19:16:35,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:35,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:16:35,721 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:16:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1769711335, now seen corresponding path program 1 times [2021-10-21 19:16:35,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:16:35,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970090353] [2021-10-21 19:16:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:35,721 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:16:35,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:16:35,722 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:16:35,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-21 19:16:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:36,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:16:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:36,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:16:36,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:16:36,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:16:36,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:16:36,441 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 [2021-10-21 19:16:36,456 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 [2021-10-21 19:16:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:36,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:16:36,574 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 [2021-10-21 19:16:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:36,775 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 [2021-10-21 19:16:36,782 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 [2021-10-21 19:16:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:36,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:16:36,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970090353] [2021-10-21 19:16:36,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970090353] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:16:36,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:16:36,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 12 [2021-10-21 19:16:36,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550100116] [2021-10-21 19:16:36,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:16:36,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:16:36,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:16:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:16:36,813 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-10-21 19:16:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:37,978 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2021-10-21 19:16:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:16:37,979 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 26 [2021-10-21 19:16:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:37,980 INFO L225 Difference]: With dead ends: 169 [2021-10-21 19:16:37,981 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 19:16:37,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:16:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 19:16:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-10-21 19:16:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 131 states have (on average 1.282442748091603) internal successors, (168), 148 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) [2021-10-21 19:16:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 171 transitions. [2021-10-21 19:16:37,987 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 171 transitions. Word has length 26 [2021-10-21 19:16:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:37,988 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 171 transitions. [2021-10-21 19:16:37,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2021-10-21 19:16:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 171 transitions. [2021-10-21 19:16:37,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:16:37,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:37,989 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:38,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:38,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:16:38,203 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-21 19:16:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:38,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1414436403, now seen corresponding path program 2 times [2021-10-21 19:16:38,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:16:38,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288591889] [2021-10-21 19:16:38,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:38,204 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:16:38,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:16:38,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:16:38,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-21 19:16:38,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:38,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:38,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:16:38,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:38,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:16:38,865 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:16:38,865 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 [2021-10-21 19:16:38,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:16:38,938 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 [2021-10-21 19:16:40,097 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-10-21 19:16:40,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2021-10-21 19:16:40,142 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:16:40,142 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 35 treesize of output 15 [2021-10-21 19:16:40,203 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:16:40,203 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 55 treesize of output 41 [2021-10-21 19:16:40,224 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:16:40,225 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 47 treesize of output 41 [2021-10-21 19:16:40,661 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:16:40,661 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 69 treesize of output 36 [2021-10-21 19:16:40,669 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:16:40,669 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 30 treesize of output 17 [2021-10-21 19:16:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:40,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:16:55,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:16:55,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 23847 treesize of output 21259 [2021-10-21 19:16:56,611 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 39442 treesize of output 38994 [2021-10-21 19:16:58,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:16:58,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288591889] [2021-10-21 19:16:58,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-21 19:16:58,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1642017036] [2021-10-21 19:16:58,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:58,112 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-21 19:16:58,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/cvc4 [2021-10-21 19:16:58,125 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-21 19:16:58,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-21 19:16:58,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:16:58,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620304640] [2021-10-21 19:16:58,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:16:58,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:58,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:58,728 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:58,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 1 [2021-10-21 19:16:58,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:16:59,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:16:59,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:16:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:59,524 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:16:59,524 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 [2021-10-21 19:16:59,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:16:59,554 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 [2021-10-21 19:17:01,178 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-10-21 19:17:01,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2021-10-21 19:17:01,220 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-21 19:17:01,220 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 35 treesize of output 15 [2021-10-21 19:17:01,276 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:17:01,277 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 55 treesize of output 41 [2021-10-21 19:17:01,297 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:17:01,297 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 47 treesize of output 41 [2021-10-21 19:17:01,507 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:17:01,507 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 69 treesize of output 36 [2021-10-21 19:17:01,513 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:17:01,513 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 30 treesize of output 17 [2021-10-21 19:17:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:17:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:17:06,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:17:06,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 23847 treesize of output 21259 [2021-10-21 19:17:07,224 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 39442 treesize of output 38994 [2021-10-21 19:17:08,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-21 19:17:08,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:17:08,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-21 19:17:08,517 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-21 19:17:08,517 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-21 19:17:08,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-21 19:17:08,524 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:17:08,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:17:08,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:17:08,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:17:08,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-21 19:17:08,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-21 19:17:08,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-21 19:17:08,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-21 19:17:08,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-21 19:17:08,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-21 19:17:08,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-21 19:17:08,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-21 19:17:08,527 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-21 19:17:08,527 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-21 19:17:08,527 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-21 19:17:08,527 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-21 19:17:08,527 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-21 19:17:08,527 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-21 19:17:08,528 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-21 19:17:08,528 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-21 19:17:08,528 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-21 19:17:08,528 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-21 19:17:08,528 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-21 19:17:08,528 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-21 19:17:08,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-21 19:17:08,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-21 19:17:08,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-21 19:17:08,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-21 19:17:08,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-21 19:17:08,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-21 19:17:08,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-21 19:17:08,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-21 19:17:08,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-21 19:17:08,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-21 19:17:08,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-21 19:17:08,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:17:08,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-21 19:17:08,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-21 19:17:08,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-21 19:17:08,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-21 19:17:08,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:17:08,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:17:08,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:17:08,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:17:08,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:08,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:17:08,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:17:08,956 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:17:08,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:17:08 BoogieIcfgContainer [2021-10-21 19:17:08,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:17:08,967 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:17:08,967 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:17:08,967 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:17:08,967 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:09:58" (3/4) ... [2021-10-21 19:17:08,970 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:17:08,970 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:17:08,971 INFO L168 Benchmark]: Toolchain (without parser) took 432515.84 ms. Allocated memory was 69.2 MB in the beginning and 373.3 MB in the end (delta: 304.1 MB). Free memory was 47.7 MB in the beginning and 220.9 MB in the end (delta: -173.2 MB). Peak memory consumption was 130.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:08,972 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 69.2 MB. Free memory is still 50.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:17:08,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.91 ms. Allocated memory is still 69.2 MB. Free memory was 47.6 MB in the beginning and 46.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:08,972 INFO L168 Benchmark]: Boogie Preprocessor took 123.01 ms. Allocated memory is still 69.2 MB. Free memory was 46.0 MB in the beginning and 42.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:08,973 INFO L168 Benchmark]: RCFGBuilder took 1291.40 ms. Allocated memory was 69.2 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Free memory was 42.7 MB in the beginning and 69.9 MB in the end (delta: -27.1 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:08,973 INFO L168 Benchmark]: TraceAbstraction took 430391.02 ms. Allocated memory was 104.9 MB in the beginning and 373.3 MB in the end (delta: 268.4 MB). Free memory was 69.3 MB in the beginning and 222.0 MB in the end (delta: -152.7 MB). Peak memory consumption was 214.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:08,974 INFO L168 Benchmark]: Witness Printer took 3.85 ms. Allocated memory is still 373.3 MB. Free memory was 222.0 MB in the beginning and 220.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:17:08,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 69.2 MB. Free memory is still 50.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 698.91 ms. Allocated memory is still 69.2 MB. Free memory was 47.6 MB in the beginning and 46.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 123.01 ms. Allocated memory is still 69.2 MB. Free memory was 46.0 MB in the beginning and 42.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1291.40 ms. Allocated memory was 69.2 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Free memory was 42.7 MB in the beginning and 69.9 MB in the end (delta: -27.1 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 430391.02 ms. Allocated memory was 104.9 MB in the beginning and 373.3 MB in the end (delta: 268.4 MB). Free memory was 69.3 MB in the beginning and 222.0 MB in the end (delta: -152.7 MB). Peak memory consumption was 214.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.85 ms. Allocated memory is still 373.3 MB. Free memory was 222.0 MB in the beginning and 220.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. 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: 1026]: 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: [L999] SLL* head = malloc(sizeof(SLL)); [L1000] head->next = ((void*)0) [L1001] head->data = 0 [L1003] SLL* x = head; [L1006] COND TRUE __VERIFIER_nondet_int() [L1009] x->next = malloc(sizeof(SLL)) [L1010] EXPR x->next [L1010] x = x->next [L1011] x->data = 0 [L1012] x->next = ((void*)0) [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1025] x = head [L1026] x->next [L1026] COND TRUE x->next [L1028] COND FALSE !(__VERIFIER_nondet_int()) [L1029] EXPR x->next [L1029] x = x->next [L1026] x->next [L1026] COND TRUE x->next [L1028] COND FALSE !(__VERIFIER_nondet_int()) [L1029] EXPR x->next [L1029] x = x->next [L1026] x->next - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: 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: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: 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: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: 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: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: 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: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: 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: 1053]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed 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: 1062]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 996]: 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, 111 locations, 45 error locations. Started 1 CEGAR loops. OverallTime: 430288.2ms, OverallIterations: 18, TraceHistogramMax: 2, EmptinessCheckTime: 52.6ms, AutomataDifference: 246086.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 928 SDtfs, 2420 SDslu, 3308 SDs, 0 SdLazy, 6159 SolverSat, 720 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 67121.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 727 GetRequests, 422 SyntacticMatches, 39 SemanticMatches, 266 ConstructedPredicates, 8 IntricatePredicates, 2 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 307075.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=17, InterpolantAutomatonStates: 197, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 146.9ms AutomataMinimizationTime, 17 MinimizatonAttempts, 465 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 214.8ms SsaConstructionTime, 1086.5ms SatisfiabilityAnalysisTime, 144981.0ms InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 600 ConstructedInterpolants, 72 QuantifiedInterpolants, 7481 SizeOfPredicates, 142 NumberOfNonLiveVariables, 1804 ConjunctsInSsa, 189 ConjunctsInUnsatCore, 34 InterpolantComputations, 28 PerfectInterpolantSequences, 8/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 19:17:09,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c5b1693-49b3-41c4-a4c4-b443ba1755b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...