./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-buckets-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y --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 c6b726a83620fff2a21a6dbfdec50e244c1786dd86dd76b1719515a59b3627ac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:49:09,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:49:09,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:49:09,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:49:09,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:49:09,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:49:09,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:49:09,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:49:09,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:49:09,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:49:09,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:49:09,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:49:09,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:49:10,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:49:10,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:49:10,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:49:10,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:49:10,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:49:10,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:49:10,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:49:10,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:49:10,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:49:10,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:49:10,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:49:10,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:49:10,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:49:10,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:49:10,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:49:10,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:49:10,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:49:10,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:49:10,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:49:10,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:49:10,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:49:10,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:49:10,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:49:10,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:49:10,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:49:10,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:49:10,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:49:10,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:49:10,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 17:49:10,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:49:10,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:49:10,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:49:10,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:49:10,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:49:10,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:49:10,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:49:10,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:49:10,128 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:49:10,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:49:10,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:49:10,130 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 17:49:10,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:49:10,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:49:10,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:49:10,132 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 17:49:10,132 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 17:49:10,132 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 17:49:10,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:49:10,133 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 17:49:10,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:49:10,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:49:10,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:49:10,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:49:10,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:49:10,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:49:10,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:49:10,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:49:10,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:49:10,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:49:10,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:49:10,136 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6b726a83620fff2a21a6dbfdec50e244c1786dd86dd76b1719515a59b3627ac [2021-11-13 17:49:10,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:49:10,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:49:10,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:49:10,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:49:10,548 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:49:10,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/forester-heap/sll-buckets-1.i [2021-11-13 17:49:10,629 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/data/f763049e0/784049624fca467eac303399065db148/FLAG25c561a42 [2021-11-13 17:49:11,300 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:49:11,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i [2021-11-13 17:49:11,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/data/f763049e0/784049624fca467eac303399065db148/FLAG25c561a42 [2021-11-13 17:49:11,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/data/f763049e0/784049624fca467eac303399065db148 [2021-11-13 17:49:11,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:49:11,501 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 17:49:11,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:49:11,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:49:11,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:49:11,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:49:11" (1/1) ... [2021-11-13 17:49:11,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@741aa559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:11, skipping insertion in model container [2021-11-13 17:49:11,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:49:11" (1/1) ... [2021-11-13 17:49:11,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:49:11,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:49:11,935 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[22663,22676] [2021-11-13 17:49:11,939 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[22734,22747] [2021-11-13 17:49:11,941 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[22862,22875] [2021-11-13 17:49:11,947 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[23275,23288] [2021-11-13 17:49:11,949 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[23364,23377] [2021-11-13 17:49:11,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:49:11,972 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:49:12,062 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[22663,22676] [2021-11-13 17:49:12,063 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[22734,22747] [2021-11-13 17:49:12,065 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[22862,22875] [2021-11-13 17:49:12,077 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[23275,23288] [2021-11-13 17:49:12,078 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_c5c0b812-09c6-4994-a44c-0d9f23d216e9/sv-benchmarks/c/forester-heap/sll-buckets-1.i[23364,23377] [2021-11-13 17:49:12,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:49:12,136 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:49:12,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12 WrapperNode [2021-11-13 17:49:12,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:49:12,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:49:12,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:49:12,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:49:12,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (1/1) ... [2021-11-13 17:49:12,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (1/1) ... [2021-11-13 17:49:12,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (1/1) ... [2021-11-13 17:49:12,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (1/1) ... [2021-11-13 17:49:12,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (1/1) ... [2021-11-13 17:49:12,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (1/1) ... [2021-11-13 17:49:12,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (1/1) ... [2021-11-13 17:49:12,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:49:12,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:49:12,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:49:12,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:49:12,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (1/1) ... [2021-11-13 17:49:12,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:49:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:12,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:49:12,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:49:12,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 17:49:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:49:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 17:49:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 17:49:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 17:49:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 17:49:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 17:49:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 17:49:12,332 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 17:49:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 17:49:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 17:49:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 17:49:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 17:49:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 17:49:12,334 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 17:49:12,334 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 17:49:12,335 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 17:49:12,335 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 17:49:12,335 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 17:49:12,335 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 17:49:12,335 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 17:49:12,336 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 17:49:12,336 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 17:49:12,336 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 17:49:12,336 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 17:49:12,336 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 17:49:12,337 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 17:49:12,337 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 17:49:12,337 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 17:49:12,337 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 17:49:12,337 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 17:49:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 17:49:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 17:49:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 17:49:12,339 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 17:49:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 17:49:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 17:49:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 17:49:12,341 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 17:49:12,342 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 17:49:12,342 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 17:49:12,342 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 17:49:12,343 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 17:49:12,343 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 17:49:12,343 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 17:49:12,343 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 17:49:12,343 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 17:49:12,344 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 17:49:12,344 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 17:49:12,344 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 17:49:12,345 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 17:49:12,345 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 17:49:12,345 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 17:49:12,346 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 17:49:12,346 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 17:49:12,346 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 17:49:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 17:49:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 17:49:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-13 17:49:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 17:49:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 17:49:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 17:49:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 17:49:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 17:49:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 17:49:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 17:49:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 17:49:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 17:49:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 17:49:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 17:49:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 17:49:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 17:49:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 17:49:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 17:49:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 17:49:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 17:49:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 17:49:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 17:49:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 17:49:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 17:49:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 17:49:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 17:49:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 17:49:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 17:49:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 17:49:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 17:49:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:49:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 17:49:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:49:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:49:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:49:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:49:12,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:49:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:49:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 17:49:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:49:12,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:49:13,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:49:13,266 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-13 17:49:13,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:49:13 BoogieIcfgContainer [2021-11-13 17:49:13,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:49:13,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:49:13,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:49:13,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:49:13,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:49:11" (1/3) ... [2021-11-13 17:49:13,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfbc7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:49:13, skipping insertion in model container [2021-11-13 17:49:13,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:12" (2/3) ... [2021-11-13 17:49:13,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfbc7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:49:13, skipping insertion in model container [2021-11-13 17:49:13,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:49:13" (3/3) ... [2021-11-13 17:49:13,311 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-1.i [2021-11-13 17:49:13,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:49:13,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-11-13 17:49:13,400 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:49:13,420 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 [2021-11-13 17:49:13,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-11-13 17:49:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 83 states have (on average 2.2048192771084336) internal successors, (183), 155 states have internal predecessors, (183), 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) [2021-11-13 17:49:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 17:49:13,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:13,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:13,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1035457678, now seen corresponding path program 1 times [2021-11-13 17:49:13,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:13,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442673380] [2021-11-13 17:49:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:13,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:13,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:13,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442673380] [2021-11-13 17:49:13,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442673380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:13,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:13,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:13,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285599424] [2021-11-13 17:49:13,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:13,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:13,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:13,887 INFO L87 Difference]: Start difference. First operand has 160 states, 83 states have (on average 2.2048192771084336) internal successors, (183), 155 states have internal predecessors, (183), 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) [2021-11-13 17:49:14,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:14,443 INFO L93 Difference]: Finished difference Result 194 states and 203 transitions. [2021-11-13 17:49:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:14,446 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 [2021-11-13 17:49:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:14,463 INFO L225 Difference]: With dead ends: 194 [2021-11-13 17:49:14,463 INFO L226 Difference]: Without dead ends: 190 [2021-11-13 17:49:14,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:14,472 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 140 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 346.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.03ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 432.13ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:14,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 130 Invalid, 257 Unknown, 0 Unchecked, 22.03ms Time], IncrementalHoareTripleChecker [7 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 432.13ms Time] [2021-11-13 17:49:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-13 17:49:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 153. [2021-11-13 17:49:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 82 states have (on average 1.9146341463414633) internal successors, (157), 149 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) [2021-11-13 17:49:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 160 transitions. [2021-11-13 17:49:14,533 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 160 transitions. Word has length 7 [2021-11-13 17:49:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:14,534 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 160 transitions. [2021-11-13 17:49:14,534 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) [2021-11-13 17:49:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 160 transitions. [2021-11-13 17:49:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 17:49:14,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:14,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:14,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:49:14,536 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1035457679, now seen corresponding path program 1 times [2021-11-13 17:49:14,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:14,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063520955] [2021-11-13 17:49:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:14,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:14,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:14,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:14,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063520955] [2021-11-13 17:49:14,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063520955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:14,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:14,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:14,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215790856] [2021-11-13 17:49:14,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:14,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:14,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:14,704 INFO L87 Difference]: Start difference. First operand 153 states and 160 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) [2021-11-13 17:49:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:15,106 INFO L93 Difference]: Finished difference Result 189 states and 198 transitions. [2021-11-13 17:49:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:15,107 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 [2021-11-13 17:49:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:15,109 INFO L225 Difference]: With dead ends: 189 [2021-11-13 17:49:15,110 INFO L226 Difference]: Without dead ends: 189 [2021-11-13 17:49:15,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:15,112 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 70 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.63ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 339.79ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:15,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 198 Invalid, 241 Unknown, 0 Unchecked, 16.63ms Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 339.79ms Time] [2021-11-13 17:49:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-13 17:49:15,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 149. [2021-11-13 17:49:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 82 states have (on average 1.8658536585365855) internal successors, (153), 145 states have internal predecessors, (153), 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) [2021-11-13 17:49:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 156 transitions. [2021-11-13 17:49:15,132 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 156 transitions. Word has length 7 [2021-11-13 17:49:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:15,133 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 156 transitions. [2021-11-13 17:49:15,133 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) [2021-11-13 17:49:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 156 transitions. [2021-11-13 17:49:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 17:49:15,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:15,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:15,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:49:15,136 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1299257372, now seen corresponding path program 1 times [2021-11-13 17:49:15,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:15,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823271577] [2021-11-13 17:49:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:15,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:15,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:15,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:15,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823271577] [2021-11-13 17:49:15,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823271577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:15,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:15,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:49:15,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743497220] [2021-11-13 17:49:15,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:15,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:49:15,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:49:15,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:15,311 INFO L87 Difference]: Start difference. First operand 149 states and 156 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-13 17:49:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:15,797 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2021-11-13 17:49:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:49:15,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 14 [2021-11-13 17:49:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:15,799 INFO L225 Difference]: With dead ends: 155 [2021-11-13 17:49:15,799 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 17:49:15,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:49:15,801 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 97 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 343.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.53ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 426.56ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:15,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 325 Invalid, 472 Unknown, 0 Unchecked, 6.53ms Time], IncrementalHoareTripleChecker [22 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 426.56ms Time] [2021-11-13 17:49:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 17:49:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2021-11-13 17:49:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 91 states have (on average 1.7472527472527473) internal successors, (159), 143 states have internal predecessors, (159), 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) [2021-11-13 17:49:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2021-11-13 17:49:15,834 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 14 [2021-11-13 17:49:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:15,834 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2021-11-13 17:49:15,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-13 17:49:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2021-11-13 17:49:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 17:49:15,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:15,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:15,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:49:15,840 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1299257371, now seen corresponding path program 1 times [2021-11-13 17:49:15,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:15,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097973364] [2021-11-13 17:49:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:15,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:16,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:16,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:16,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097973364] [2021-11-13 17:49:16,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097973364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:16,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:16,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:49:16,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693277436] [2021-11-13 17:49:16,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:16,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:49:16,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:49:16,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:16,080 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-13 17:49:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:16,512 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2021-11-13 17:49:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:49:16,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 14 [2021-11-13 17:49:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:16,514 INFO L225 Difference]: With dead ends: 143 [2021-11-13 17:49:16,514 INFO L226 Difference]: Without dead ends: 143 [2021-11-13 17:49:16,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:49:16,517 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 6 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 302.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.36ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:16,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 436 Invalid, 401 Unknown, 0 Unchecked, 6.36ms Time], IncrementalHoareTripleChecker [7 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 365.75ms Time] [2021-11-13 17:49:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-13 17:49:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-13 17:49:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.7032967032967032) internal successors, (155), 139 states have internal predecessors, (155), 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) [2021-11-13 17:49:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2021-11-13 17:49:16,529 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 14 [2021-11-13 17:49:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:16,530 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2021-11-13 17:49:16,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-13 17:49:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2021-11-13 17:49:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 17:49:16,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:16,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:16,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:49:16,532 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:16,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1036131901, now seen corresponding path program 1 times [2021-11-13 17:49:16,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:16,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524454456] [2021-11-13 17:49:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:16,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:16,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:16,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:16,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524454456] [2021-11-13 17:49:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524454456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:16,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:16,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:49:16,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469139765] [2021-11-13 17:49:16,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:16,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:49:16,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:16,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:49:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:16,665 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:17,091 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2021-11-13 17:49:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:49:17,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-13 17:49:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:17,094 INFO L225 Difference]: With dead ends: 150 [2021-11-13 17:49:17,094 INFO L226 Difference]: Without dead ends: 150 [2021-11-13 17:49:17,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:49:17,095 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 94 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.71ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 364.96ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:17,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 317 Invalid, 441 Unknown, 0 Unchecked, 5.71ms Time], IncrementalHoareTripleChecker [8 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 364.96ms Time] [2021-11-13 17:49:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-13 17:49:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2021-11-13 17:49:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 91 states have (on average 1.6923076923076923) internal successors, (154), 138 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) [2021-11-13 17:49:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2021-11-13 17:49:17,118 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 21 [2021-11-13 17:49:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:17,119 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2021-11-13 17:49:17,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2021-11-13 17:49:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 17:49:17,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:17,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:17,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:49:17,126 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1036131902, now seen corresponding path program 1 times [2021-11-13 17:49:17,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:17,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236836392] [2021-11-13 17:49:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:17,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:17,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:17,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:17,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236836392] [2021-11-13 17:49:17,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236836392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:17,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:17,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:49:17,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658587587] [2021-11-13 17:49:17,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:17,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:49:17,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:49:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:17,357 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:17,755 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2021-11-13 17:49:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:49:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-13 17:49:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:17,757 INFO L225 Difference]: With dead ends: 142 [2021-11-13 17:49:17,757 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 17:49:17,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:49:17,759 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 8 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 280.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.20ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 336.36ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:17,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 423 Invalid, 389 Unknown, 0 Unchecked, 5.20ms Time], IncrementalHoareTripleChecker [3 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 336.36ms Time] [2021-11-13 17:49:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 17:49:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2021-11-13 17:49:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 91 states have (on average 1.6593406593406594) internal successors, (151), 135 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2021-11-13 17:49:17,767 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 21 [2021-11-13 17:49:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:17,768 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2021-11-13 17:49:17,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2021-11-13 17:49:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 17:49:17,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:17,770 INFO L514 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] [2021-11-13 17:49:17,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:49:17,770 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash 287913318, now seen corresponding path program 1 times [2021-11-13 17:49:17,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:17,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702309288] [2021-11-13 17:49:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:17,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:17,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:17,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:17,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702309288] [2021-11-13 17:49:17,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702309288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:17,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:17,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:17,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429325647] [2021-11-13 17:49:17,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:17,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:17,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:17,859 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2021-11-13 17:49:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:18,106 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2021-11-13 17:49:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:18,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 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 [2021-11-13 17:49:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:18,108 INFO L225 Difference]: With dead ends: 145 [2021-11-13 17:49:18,109 INFO L226 Difference]: Without dead ends: 145 [2021-11-13 17:49:18,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:18,110 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 67 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.64ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 234.49ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:18,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 151 Invalid, 215 Unknown, 0 Unchecked, 3.64ms Time], IncrementalHoareTripleChecker [6 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 234.49ms Time] [2021-11-13 17:49:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-13 17:49:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 134. [2021-11-13 17:49:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 130 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2021-11-13 17:49:18,118 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 27 [2021-11-13 17:49:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:18,118 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2021-11-13 17:49:18,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2021-11-13 17:49:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2021-11-13 17:49:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 17:49:18,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:18,120 INFO L514 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] [2021-11-13 17:49:18,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:49:18,121 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash 287913319, now seen corresponding path program 1 times [2021-11-13 17:49:18,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:18,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26440995] [2021-11-13 17:49:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:18,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:18,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:18,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:18,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26440995] [2021-11-13 17:49:18,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26440995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:18,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:18,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:18,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542075399] [2021-11-13 17:49:18,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:18,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:18,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:18,203 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2021-11-13 17:49:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:18,457 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2021-11-13 17:49:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 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 [2021-11-13 17:49:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:18,459 INFO L225 Difference]: With dead ends: 140 [2021-11-13 17:49:18,459 INFO L226 Difference]: Without dead ends: 140 [2021-11-13 17:49:18,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:18,460 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 62 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 184.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.54ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 242.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:18,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 152 Invalid, 204 Unknown, 0 Unchecked, 3.54ms Time], IncrementalHoareTripleChecker [5 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 242.09ms Time] [2021-11-13 17:49:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-13 17:49:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2021-11-13 17:49:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 91 states have (on average 1.5494505494505495) internal successors, (141), 125 states have internal predecessors, (141), 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) [2021-11-13 17:49:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2021-11-13 17:49:18,466 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 27 [2021-11-13 17:49:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:18,467 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2021-11-13 17:49:18,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2021-11-13 17:49:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2021-11-13 17:49:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 17:49:18,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:18,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:18,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:49:18,469 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr51REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1806871348, now seen corresponding path program 1 times [2021-11-13 17:49:18,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:18,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126332317] [2021-11-13 17:49:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:18,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:18,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:18,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:18,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126332317] [2021-11-13 17:49:18,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126332317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:18,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:18,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:49:18,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993033513] [2021-11-13 17:49:18,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:18,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:49:18,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:49:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:49:18,672 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:19,049 INFO L93 Difference]: Finished difference Result 172 states and 181 transitions. [2021-11-13 17:49:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:49:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-13 17:49:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:19,052 INFO L225 Difference]: With dead ends: 172 [2021-11-13 17:49:19,052 INFO L226 Difference]: Without dead ends: 172 [2021-11-13 17:49:19,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:49:19,053 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 556 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 280.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.87ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 337.48ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:19,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 215 Invalid, 374 Unknown, 0 Unchecked, 7.87ms Time], IncrementalHoareTripleChecker [54 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 337.48ms Time] [2021-11-13 17:49:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-13 17:49:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 131. [2021-11-13 17:49:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 94 states have (on average 1.553191489361702) internal successors, (146), 127 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2021-11-13 17:49:19,061 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 29 [2021-11-13 17:49:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:19,061 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2021-11-13 17:49:19,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2021-11-13 17:49:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 17:49:19,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:19,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:19,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:49:19,069 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1806871349, now seen corresponding path program 1 times [2021-11-13 17:49:19,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:19,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476111884] [2021-11-13 17:49:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:19,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:19,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:19,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:19,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476111884] [2021-11-13 17:49:19,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476111884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:19,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:19,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:19,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496701840] [2021-11-13 17:49:19,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:19,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:19,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:19,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:19,281 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:19,592 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2021-11-13 17:49:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:19,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-13 17:49:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:19,594 INFO L225 Difference]: With dead ends: 182 [2021-11-13 17:49:19,594 INFO L226 Difference]: Without dead ends: 182 [2021-11-13 17:49:19,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:49:19,595 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 72 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 284.16ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:19,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 214 Invalid, 276 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [7 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 284.16ms Time] [2021-11-13 17:49:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-13 17:49:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 163. [2021-11-13 17:49:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 126 states have (on average 1.5714285714285714) internal successors, (198), 159 states have internal predecessors, (198), 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) [2021-11-13 17:49:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2021-11-13 17:49:19,602 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 29 [2021-11-13 17:49:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:19,603 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2021-11-13 17:49:19,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2021-11-13 17:49:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 17:49:19,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:19,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:19,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:49:19,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr71ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash 178437886, now seen corresponding path program 1 times [2021-11-13 17:49:19,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:19,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574438056] [2021-11-13 17:49:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:19,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:19,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:19,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:19,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574438056] [2021-11-13 17:49:19,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574438056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:19,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:19,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:49:19,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982884700] [2021-11-13 17:49:19,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:19,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:19,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:19,687 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:19,975 INFO L93 Difference]: Finished difference Result 247 states and 296 transitions. [2021-11-13 17:49:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:19,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-13 17:49:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:19,980 INFO L225 Difference]: With dead ends: 247 [2021-11-13 17:49:19,980 INFO L226 Difference]: Without dead ends: 247 [2021-11-13 17:49:19,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:49:19,981 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 206 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 264.14ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:19,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 224 Invalid, 234 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [6 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 264.14ms Time] [2021-11-13 17:49:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-13 17:49:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 164. [2021-11-13 17:49:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 128 states have (on average 1.546875) internal successors, (198), 160 states have internal predecessors, (198), 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) [2021-11-13 17:49:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 201 transitions. [2021-11-13 17:49:19,992 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 201 transitions. Word has length 30 [2021-11-13 17:49:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:19,993 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 201 transitions. [2021-11-13 17:49:19,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 201 transitions. [2021-11-13 17:49:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 17:49:19,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:19,994 INFO L514 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] [2021-11-13 17:49:19,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:49:19,995 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr55REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:19,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1349028874, now seen corresponding path program 1 times [2021-11-13 17:49:19,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:19,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774145269] [2021-11-13 17:49:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:19,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:20,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:20,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774145269] [2021-11-13 17:49:20,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774145269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:20,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:20,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 17:49:20,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784776684] [2021-11-13 17:49:20,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:20,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:49:20,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:49:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:49:20,726 INFO L87 Difference]: Start difference. First operand 164 states and 201 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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) [2021-11-13 17:49:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:22,096 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2021-11-13 17:49:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 17:49:22,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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 [2021-11-13 17:49:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:22,098 INFO L225 Difference]: With dead ends: 181 [2021-11-13 17:49:22,099 INFO L226 Difference]: Without dead ends: 181 [2021-11-13 17:49:22,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 17:49:22,100 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 198 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 697.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.61ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 820.52ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:22,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 807 Invalid, 975 Unknown, 0 Unchecked, 11.61ms Time], IncrementalHoareTripleChecker [61 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 820.52ms Time] [2021-11-13 17:49:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-13 17:49:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 144. [2021-11-13 17:49:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 109 states have (on average 1.4587155963302751) internal successors, (159), 140 states have internal predecessors, (159), 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) [2021-11-13 17:49:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2021-11-13 17:49:22,107 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 33 [2021-11-13 17:49:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:22,107 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2021-11-13 17:49:22,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 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) [2021-11-13 17:49:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2021-11-13 17:49:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 17:49:22,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:22,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:22,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:49:22,110 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr31ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:22,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash 755626526, now seen corresponding path program 1 times [2021-11-13 17:49:22,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:22,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165838385] [2021-11-13 17:49:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:22,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:22,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:22,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:22,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165838385] [2021-11-13 17:49:22,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165838385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:22,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:22,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:22,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773395738] [2021-11-13 17:49:22,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:22,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:22,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:22,178 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:22,380 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2021-11-13 17:49:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-13 17:49:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:22,382 INFO L225 Difference]: With dead ends: 144 [2021-11-13 17:49:22,382 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 17:49:22,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:22,383 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 47 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.79ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.07ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:22,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 180 Invalid, 147 Unknown, 0 Unchecked, 2.79ms Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 192.07ms Time] [2021-11-13 17:49:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 17:49:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-11-13 17:49:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 108 states have (on average 1.4537037037037037) internal successors, (157), 138 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) [2021-11-13 17:49:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2021-11-13 17:49:22,390 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 35 [2021-11-13 17:49:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:22,390 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2021-11-13 17:49:22,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2021-11-13 17:49:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 17:49:22,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:22,392 INFO L514 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] [2021-11-13 17:49:22,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:49:22,392 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:22,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1949590012, now seen corresponding path program 1 times [2021-11-13 17:49:22,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:22,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814474199] [2021-11-13 17:49:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:22,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:22,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:22,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:22,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814474199] [2021-11-13 17:49:22,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814474199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:22,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:22,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:49:22,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145576838] [2021-11-13 17:49:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:22,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:49:22,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:49:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:49:22,613 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-11-13 17:49:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:23,179 INFO L93 Difference]: Finished difference Result 215 states and 236 transitions. [2021-11-13 17:49:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:49:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 36 [2021-11-13 17:49:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:23,182 INFO L225 Difference]: With dead ends: 215 [2021-11-13 17:49:23,182 INFO L226 Difference]: Without dead ends: 215 [2021-11-13 17:49:23,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:49:23,183 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 515 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 372.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.97ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 442.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 279 Invalid, 476 Unknown, 0 Unchecked, 6.97ms Time], IncrementalHoareTripleChecker [27 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 442.99ms Time] [2021-11-13 17:49:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-13 17:49:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 173. [2021-11-13 17:49:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 139 states have (on average 1.460431654676259) internal successors, (203), 169 states have internal predecessors, (203), 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) [2021-11-13 17:49:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2021-11-13 17:49:23,192 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 36 [2021-11-13 17:49:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:23,194 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2021-11-13 17:49:23,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-11-13 17:49:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2021-11-13 17:49:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:49:23,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:23,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:23,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:49:23,196 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr69ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:23,197 INFO L85 PathProgramCache]: Analyzing trace with hash -814677363, now seen corresponding path program 1 times [2021-11-13 17:49:23,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:23,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426254701] [2021-11-13 17:49:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:23,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:23,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:23,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:23,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426254701] [2021-11-13 17:49:23,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426254701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:23,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:23,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:23,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309429012] [2021-11-13 17:49:23,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:23,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:23,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:23,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:23,344 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-11-13 17:49:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:23,656 INFO L93 Difference]: Finished difference Result 212 states and 239 transitions. [2021-11-13 17:49:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:23,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 39 [2021-11-13 17:49:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:23,659 INFO L225 Difference]: With dead ends: 212 [2021-11-13 17:49:23,659 INFO L226 Difference]: Without dead ends: 212 [2021-11-13 17:49:23,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:49:23,660 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 169 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 240.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.29ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 289.12ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:23,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 230 Invalid, 247 Unknown, 0 Unchecked, 4.29ms Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 289.12ms Time] [2021-11-13 17:49:23,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-13 17:49:23,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 176. [2021-11-13 17:49:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 142 states have (on average 1.4577464788732395) internal successors, (207), 172 states have internal predecessors, (207), 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) [2021-11-13 17:49:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 210 transitions. [2021-11-13 17:49:23,668 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 210 transitions. Word has length 39 [2021-11-13 17:49:23,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:23,669 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 210 transitions. [2021-11-13 17:49:23,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-11-13 17:49:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 210 transitions. [2021-11-13 17:49:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 17:49:23,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:23,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:23,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:49:23,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:23,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1143593272, now seen corresponding path program 1 times [2021-11-13 17:49:23,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:23,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429906730] [2021-11-13 17:49:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:23,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:24,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:24,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429906730] [2021-11-13 17:49:24,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429906730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:24,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439149727] [2021-11-13 17:49:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:24,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:24,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:24,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:24,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:49:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 17:49:24,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:24,723 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 [2021-11-13 17:49:24,797 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:49:24,798 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 [2021-11-13 17:49:24,864 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 [2021-11-13 17:49:25,063 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 17:49:25,064 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 [2021-11-13 17:49:25,139 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 17:49:25,139 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 38 treesize of output 29 [2021-11-13 17:49:25,247 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-13 17:49:25,248 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 [2021-11-13 17:49:25,409 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-13 17:49:25,410 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 62 treesize of output 52 [2021-11-13 17:49:25,944 INFO L354 Elim1Store]: treesize reduction 144, result has 14.3 percent of original size [2021-11-13 17:49:25,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 55 [2021-11-13 17:49:26,141 INFO L354 Elim1Store]: treesize reduction 126, result has 16.0 percent of original size [2021-11-13 17:49:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 64 [2021-11-13 17:49:26,403 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-11-13 17:49:26,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 74 [2021-11-13 17:49:30,824 INFO L354 Elim1Store]: treesize reduction 126, result has 29.2 percent of original size [2021-11-13 17:49:30,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 112 treesize of output 142 [2021-11-13 17:49:31,091 INFO L354 Elim1Store]: treesize reduction 236, result has 12.3 percent of original size [2021-11-13 17:49:31,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 135 treesize of output 92 [2021-11-13 17:49:31,616 INFO L354 Elim1Store]: treesize reduction 400, result has 10.5 percent of original size [2021-11-13 17:49:31,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 159 treesize of output 104 [2021-11-13 17:49:33,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:49:33,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:49:33,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-13 17:49:33,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154969396] [2021-11-13 17:49:33,888 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:33,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 17:49:33,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 17:49:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=927, Unknown=4, NotChecked=0, Total=1122 [2021-11-13 17:49:33,890 INFO L87 Difference]: Start difference. First operand 176 states and 210 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-11-13 17:49:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:35,797 INFO L93 Difference]: Finished difference Result 274 states and 308 transitions. [2021-11-13 17:49:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 17:49:35,798 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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 41 [2021-11-13 17:49:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:35,800 INFO L225 Difference]: With dead ends: 274 [2021-11-13 17:49:35,801 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 17:49:35,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=471, Invalid=2495, Unknown=4, NotChecked=0, Total=2970 [2021-11-13 17:49:35,803 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 632 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 942.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.59ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1126.62ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:35,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 806 Invalid, 1409 Unknown, 0 Unchecked, 14.59ms Time], IncrementalHoareTripleChecker [124 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 1126.62ms Time] [2021-11-13 17:49:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 17:49:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 194. [2021-11-13 17:49:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 160 states have (on average 1.43125) internal successors, (229), 190 states have internal predecessors, (229), 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) [2021-11-13 17:49:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2021-11-13 17:49:35,815 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 41 [2021-11-13 17:49:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:35,816 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2021-11-13 17:49:35,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-11-13 17:49:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2021-11-13 17:49:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 17:49:35,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:35,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:35,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:36,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 17:49:36,052 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1143593273, now seen corresponding path program 1 times [2021-11-13 17:49:36,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:36,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382405776] [2021-11-13 17:49:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:36,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:36,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:36,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382405776] [2021-11-13 17:49:36,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382405776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:36,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109327920] [2021-11-13 17:49:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:36,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:36,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:36,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:36,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:49:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:37,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 17:49:37,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:37,177 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 [2021-11-13 17:49:37,194 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 [2021-11-13 17:49:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:49:37,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 17:49:37,322 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:49:37,322 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 [2021-11-13 17:49:37,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:49:37,401 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 [2021-11-13 17:49:37,409 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 [2021-11-13 17:49:37,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-13 17:49:37,649 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 [2021-11-13 17:49:37,738 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 17:49:37,739 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 38 treesize of output 25 [2021-11-13 17:49:37,869 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-13 17:49:37,869 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 22 treesize of output 33 [2021-11-13 17:49:38,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:49:38,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:49:38,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-13 17:49:38,209 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 51 treesize of output 35 [2021-11-13 17:49:38,494 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-13 17:49:38,495 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 45 treesize of output 47 [2021-11-13 17:49:38,698 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-13 17:49:38,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 50 [2021-11-13 17:49:38,830 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-13 17:49:38,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 59 [2021-11-13 17:49:39,328 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-13 17:49:39,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 57 treesize of output 75 [2021-11-13 17:49:39,626 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-11-13 17:49:39,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 67 [2021-11-13 17:49:40,092 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-11-13 17:49:40,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 71 treesize of output 76 [2021-11-13 17:49:40,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.base, main_~bcki~0.offset] [2021-11-13 17:49:40,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:49:40,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-13 17:49:40,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532800608] [2021-11-13 17:49:40,326 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:40,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:49:40,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:49:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 17:49:40,328 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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) [2021-11-13 17:49:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:42,879 INFO L93 Difference]: Finished difference Result 344 states and 390 transitions. [2021-11-13 17:49:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 17:49:42,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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 41 [2021-11-13 17:49:42,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:42,882 INFO L225 Difference]: With dead ends: 344 [2021-11-13 17:49:42,883 INFO L226 Difference]: Without dead ends: 344 [2021-11-13 17:49:42,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=304, Invalid=2348, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 17:49:42,885 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 649 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1332.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.35ms SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1599.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:42,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 946 Invalid, 1559 Unknown, 0 Unchecked, 11.35ms Time], IncrementalHoareTripleChecker [91 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1599.26ms Time] [2021-11-13 17:49:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-13 17:49:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 197. [2021-11-13 17:49:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 163 states have (on average 1.4294478527607362) internal successors, (233), 193 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:49:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 236 transitions. [2021-11-13 17:49:42,895 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 236 transitions. Word has length 41 [2021-11-13 17:49:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:42,895 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 236 transitions. [2021-11-13 17:49:42,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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) [2021-11-13 17:49:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 236 transitions. [2021-11-13 17:49:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 17:49:42,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:42,897 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:42,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:43,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 17:49:43,112 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr51REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:43,112 INFO L85 PathProgramCache]: Analyzing trace with hash 807182741, now seen corresponding path program 1 times [2021-11-13 17:49:43,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:43,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919008316] [2021-11-13 17:49:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:43,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:43,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:43,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:43,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919008316] [2021-11-13 17:49:43,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919008316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:43,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136142950] [2021-11-13 17:49:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:43,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:43,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:43,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:43,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:49:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:43,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 17:49:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:43,836 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 [2021-11-13 17:49:43,873 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:49:43,874 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 [2021-11-13 17:49:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-13 17:49:43,994 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 [2021-11-13 17:49:44,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:49:44,089 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:49:44,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 17:49:44,157 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-13 17:49:44,157 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 32 treesize of output 34 [2021-11-13 17:49:44,479 INFO L354 Elim1Store]: treesize reduction 124, result has 26.2 percent of original size [2021-11-13 17:49:44,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 66 [2021-11-13 17:49:44,745 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-13 17:49:44,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 81 [2021-11-13 17:49:45,092 INFO L354 Elim1Store]: treesize reduction 172, result has 19.2 percent of original size [2021-11-13 17:49:45,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 102 [2021-11-13 17:49:49,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:49:49,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:49:49,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-13 17:49:49,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736360606] [2021-11-13 17:49:49,191 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:49,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:49:49,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:49:49,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=600, Unknown=1, NotChecked=0, Total=702 [2021-11-13 17:49:49,193 INFO L87 Difference]: Start difference. First operand 197 states and 236 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2021-11-13 17:49:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:50,568 INFO L93 Difference]: Finished difference Result 225 states and 254 transitions. [2021-11-13 17:49:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 17:49:50,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 42 [2021-11-13 17:49:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:50,571 INFO L225 Difference]: With dead ends: 225 [2021-11-13 17:49:50,571 INFO L226 Difference]: Without dead ends: 225 [2021-11-13 17:49:50,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=291, Invalid=1600, Unknown=1, NotChecked=0, Total=1892 [2021-11-13 17:49:50,573 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 347 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 664.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 797.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:50,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 703 Invalid, 1084 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [86 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 797.38ms Time] [2021-11-13 17:49:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-13 17:49:50,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2021-11-13 17:49:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 167 states have (on average 1.4311377245508983) internal successors, (239), 197 states have internal predecessors, (239), 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) [2021-11-13 17:49:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 242 transitions. [2021-11-13 17:49:50,581 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 242 transitions. Word has length 42 [2021-11-13 17:49:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:50,581 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 242 transitions. [2021-11-13 17:49:50,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2021-11-13 17:49:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 242 transitions. [2021-11-13 17:49:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 17:49:50,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:50,583 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:50,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:50,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 17:49:50,796 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:49:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash 807182742, now seen corresponding path program 1 times [2021-11-13 17:49:50,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:50,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984837481] [2021-11-13 17:49:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:50,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:51,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:49:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:51,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:51,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984837481] [2021-11-13 17:49:51,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984837481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:51,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615954801] [2021-11-13 17:49:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:51,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:51,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:51,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:51,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:49:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:51,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-13 17:49:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:51,628 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 [2021-11-13 17:49:51,661 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 [2021-11-13 17:49:51,681 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:49:51,682 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 17 treesize of output 21 [2021-11-13 17:49:51,745 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 [2021-11-13 17:49:51,752 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 [2021-11-13 17:49:52,013 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 17:49:52,014 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 [2021-11-13 17:49:52,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-13 17:49:52,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:49:52,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:49:52,265 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-13 17:49:52,266 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 19 treesize of output 19 [2021-11-13 17:49:52,301 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-13 17:49:52,301 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 16 treesize of output 18 [2021-11-13 17:49:52,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:49:52,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2021-11-13 17:49:52,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:49:52,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-13 17:49:52,938 INFO L354 Elim1Store]: treesize reduction 144, result has 14.3 percent of original size [2021-11-13 17:49:52,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 92 [2021-11-13 17:49:52,963 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-13 17:49:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 83 [2021-11-13 17:49:53,146 INFO L354 Elim1Store]: treesize reduction 126, result has 16.0 percent of original size [2021-11-13 17:49:53,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 95 [2021-11-13 17:49:53,180 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-11-13 17:49:53,180 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 123 treesize of output 125 [2021-11-13 17:49:53,403 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-11-13 17:49:53,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 178 treesize of output 112 [2021-11-13 17:49:53,447 INFO L354 Elim1Store]: treesize reduction 196, result has 16.2 percent of original size [2021-11-13 17:49:53,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 163 [2021-11-13 17:49:59,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:49:59,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:49:59,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-13 17:49:59,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037235894] [2021-11-13 17:49:59,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:59,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 17:49:59,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 17:49:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=670, Unknown=4, NotChecked=0, Total=812 [2021-11-13 17:49:59,003 INFO L87 Difference]: Start difference. First operand 201 states and 242 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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) [2021-11-13 17:50:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:00,134 INFO L93 Difference]: Finished difference Result 256 states and 297 transitions. [2021-11-13 17:50:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 17:50:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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 42 [2021-11-13 17:50:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:00,136 INFO L225 Difference]: With dead ends: 256 [2021-11-13 17:50:00,137 INFO L226 Difference]: Without dead ends: 256 [2021-11-13 17:50:00,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=230, Invalid=1326, Unknown=4, NotChecked=0, Total=1560 [2021-11-13 17:50:00,138 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 284 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 592.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.40ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 723.17ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:00,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 620 Invalid, 943 Unknown, 0 Unchecked, 5.40ms Time], IncrementalHoareTripleChecker [40 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 723.17ms Time] [2021-11-13 17:50:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-13 17:50:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 228. [2021-11-13 17:50:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 194 states have (on average 1.4484536082474226) internal successors, (281), 224 states have internal predecessors, (281), 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) [2021-11-13 17:50:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 284 transitions. [2021-11-13 17:50:00,148 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 284 transitions. Word has length 42 [2021-11-13 17:50:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:00,148 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 284 transitions. [2021-11-13 17:50:00,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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) [2021-11-13 17:50:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 284 transitions. [2021-11-13 17:50:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 17:50:00,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:00,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:00,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:00,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:00,376 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr71ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -747137859, now seen corresponding path program 1 times [2021-11-13 17:50:00,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:00,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791481863] [2021-11-13 17:50:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:00,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:00,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:00,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:00,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791481863] [2021-11-13 17:50:00,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791481863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:00,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740510968] [2021-11-13 17:50:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:00,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:00,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:00,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:50:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:01,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 17:50:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:01,057 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 [2021-11-13 17:50:01,091 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:50:01,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 17:50:01,108 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 [2021-11-13 17:50:01,277 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 17:50:01,278 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 43 treesize of output 19 [2021-11-13 17:50:01,340 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 17:50:01,340 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 28 [2021-11-13 17:50:01,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:50:01,417 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 [2021-11-13 17:50:01,513 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-13 17:50:01,513 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 48 treesize of output 42 [2021-11-13 17:50:01,832 INFO L354 Elim1Store]: treesize reduction 124, result has 26.2 percent of original size [2021-11-13 17:50:01,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 65 [2021-11-13 17:50:02,009 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-13 17:50:02,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 80 [2021-11-13 17:50:02,315 INFO L354 Elim1Store]: treesize reduction 172, result has 19.2 percent of original size [2021-11-13 17:50:02,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 101 [2021-11-13 17:50:11,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:50:11,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:50:11,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-13 17:50:11,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46523822] [2021-11-13 17:50:11,728 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:11,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 17:50:11,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 17:50:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=576, Unknown=4, NotChecked=0, Total=702 [2021-11-13 17:50:11,729 INFO L87 Difference]: Start difference. First operand 228 states and 284 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 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) [2021-11-13 17:50:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:12,573 INFO L93 Difference]: Finished difference Result 253 states and 294 transitions. [2021-11-13 17:50:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 17:50:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 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 43 [2021-11-13 17:50:12,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:12,576 INFO L225 Difference]: With dead ends: 253 [2021-11-13 17:50:12,576 INFO L226 Difference]: Without dead ends: 253 [2021-11-13 17:50:12,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=223, Invalid=1255, Unknown=4, NotChecked=0, Total=1482 [2021-11-13 17:50:12,577 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 275 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 461.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.74ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 557.07ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:12,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 720 Invalid, 792 Unknown, 0 Unchecked, 4.74ms Time], IncrementalHoareTripleChecker [39 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 557.07ms Time] [2021-11-13 17:50:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-13 17:50:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 228. [2021-11-13 17:50:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 194 states have (on average 1.443298969072165) internal successors, (280), 224 states have internal predecessors, (280), 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) [2021-11-13 17:50:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 283 transitions. [2021-11-13 17:50:12,590 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 283 transitions. Word has length 43 [2021-11-13 17:50:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:12,590 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 283 transitions. [2021-11-13 17:50:12,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 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) [2021-11-13 17:50:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 283 transitions. [2021-11-13 17:50:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 17:50:12,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:12,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:12,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 17:50:12,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:12,808 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr45REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1675703202, now seen corresponding path program 1 times [2021-11-13 17:50:12,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:12,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691146351] [2021-11-13 17:50:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:12,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:13,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:13,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:13,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691146351] [2021-11-13 17:50:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691146351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:13,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:13,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 17:50:13,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694947393] [2021-11-13 17:50:13,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:13,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:50:13,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:50:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:50:13,624 INFO L87 Difference]: Start difference. First operand 228 states and 283 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 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) [2021-11-13 17:50:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:14,982 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2021-11-13 17:50:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 17:50:14,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 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 45 [2021-11-13 17:50:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:14,992 INFO L225 Difference]: With dead ends: 284 [2021-11-13 17:50:14,992 INFO L226 Difference]: Without dead ends: 284 [2021-11-13 17:50:14,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 17:50:14,994 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 442 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 526.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.59ms SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 619.10ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:14,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 434 Invalid, 752 Unknown, 0 Unchecked, 4.59ms Time], IncrementalHoareTripleChecker [110 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 619.10ms Time] [2021-11-13 17:50:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-13 17:50:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 232. [2021-11-13 17:50:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 198 states have (on average 1.4343434343434343) internal successors, (284), 228 states have internal predecessors, (284), 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) [2021-11-13 17:50:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 287 transitions. [2021-11-13 17:50:15,004 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 287 transitions. Word has length 45 [2021-11-13 17:50:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:15,005 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 287 transitions. [2021-11-13 17:50:15,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 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) [2021-11-13 17:50:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 287 transitions. [2021-11-13 17:50:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 17:50:15,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:15,006 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:15,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 17:50:15,007 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr38ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:15,007 INFO L85 PathProgramCache]: Analyzing trace with hash -52975011, now seen corresponding path program 1 times [2021-11-13 17:50:15,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:15,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866988141] [2021-11-13 17:50:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:15,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:15,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:15,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:15,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866988141] [2021-11-13 17:50:15,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866988141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:15,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785994105] [2021-11-13 17:50:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:15,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:15,524 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:50:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 17:50:15,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:15,708 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-13 17:50:15,708 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 2 case distinctions, treesize of input 21 treesize of output 24 [2021-11-13 17:50:15,791 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-13 17:50:15,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-13 17:50:15,871 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-13 17:50:15,872 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-13 17:50:15,967 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-13 17:50:15,968 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-13 17:50:16,094 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-13 17:50:16,095 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-13 17:50:16,280 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-13 17:50:16,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-13 17:50:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:50:16,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:50:16,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785994105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:50:16,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:50:16,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 4] total 22 [2021-11-13 17:50:16,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848893130] [2021-11-13 17:50:16,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:16,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 17:50:16,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:16,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 17:50:16,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-13 17:50:16,654 INFO L87 Difference]: Start difference. First operand 232 states and 287 transitions. Second operand has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:50:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:18,364 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2021-11-13 17:50:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 17:50:18,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-13 17:50:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:18,367 INFO L225 Difference]: With dead ends: 284 [2021-11-13 17:50:18,367 INFO L226 Difference]: Without dead ends: 284 [2021-11-13 17:50:18,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=453, Invalid=1709, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 17:50:18,369 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 663 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 719.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.28ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 872.46ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:18,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 764 Invalid, 1334 Unknown, 0 Unchecked, 8.28ms Time], IncrementalHoareTripleChecker [117 Valid, 1173 Invalid, 0 Unknown, 44 Unchecked, 872.46ms Time] [2021-11-13 17:50:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-13 17:50:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 226. [2021-11-13 17:50:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 193 states have (on average 1.4300518134715026) internal successors, (276), 222 states have internal predecessors, (276), 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) [2021-11-13 17:50:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 279 transitions. [2021-11-13 17:50:18,378 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 279 transitions. Word has length 45 [2021-11-13 17:50:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:18,379 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 279 transitions. [2021-11-13 17:50:18,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 21 states have internal predecessors, (118), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:50:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 279 transitions. [2021-11-13 17:50:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 17:50:18,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:18,380 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:18,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:18,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 17:50:18,592 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr55REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1486007849, now seen corresponding path program 1 times [2021-11-13 17:50:18,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:18,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965266982] [2021-11-13 17:50:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:18,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:19,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:19,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:19,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965266982] [2021-11-13 17:50:19,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965266982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:19,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858669352] [2021-11-13 17:50:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:19,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:19,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:19,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:19,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:50:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:19,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-13 17:50:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:19,617 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 [2021-11-13 17:50:19,651 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:50:19,651 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 [2021-11-13 17:50:19,661 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 [2021-11-13 17:50:19,724 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 [2021-11-13 17:50:19,736 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 [2021-11-13 17:50:20,038 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 17:50:20,038 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 60 treesize of output 32 [2021-11-13 17:50:20,048 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-13 17:50:20,048 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 41 treesize of output 36 [2021-11-13 17:50:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:20,071 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 [2021-11-13 17:50:20,168 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 17:50:20,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:50:20,197 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 17:50:20,197 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 38 treesize of output 29 [2021-11-13 17:50:20,324 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-13 17:50:20,324 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 16 treesize of output 18 [2021-11-13 17:50:20,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:20,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-13 17:50:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:20,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-13 17:50:20,672 INFO L354 Elim1Store]: treesize reduction 110, result has 16.7 percent of original size [2021-11-13 17:50:20,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 72 [2021-11-13 17:50:20,694 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-13 17:50:20,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 75 [2021-11-13 17:50:20,748 INFO L354 Elim1Store]: treesize reduction 92, result has 19.3 percent of original size [2021-11-13 17:50:20,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 75 [2021-11-13 17:50:20,768 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-13 17:50:20,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 93 [2021-11-13 17:50:20,934 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-11-13 17:50:20,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 92 [2021-11-13 17:50:20,966 INFO L354 Elim1Store]: treesize reduction 170, result has 17.5 percent of original size [2021-11-13 17:50:20,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 131 [2021-11-13 17:50:21,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:50:21,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:50:21,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-13 17:50:21,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26655613] [2021-11-13 17:50:21,214 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:21,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 17:50:21,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 17:50:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 17:50:21,216 INFO L87 Difference]: Start difference. First operand 226 states and 279 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 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) [2021-11-13 17:50:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:22,783 INFO L93 Difference]: Finished difference Result 222 states and 255 transitions. [2021-11-13 17:50:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 17:50:22,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 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 46 [2021-11-13 17:50:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:22,786 INFO L225 Difference]: With dead ends: 222 [2021-11-13 17:50:22,786 INFO L226 Difference]: Without dead ends: 222 [2021-11-13 17:50:22,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=383, Invalid=2697, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 17:50:22,789 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 340 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 653.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.57ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 781.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:22,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 606 Invalid, 916 Unknown, 0 Unchecked, 6.57ms Time], IncrementalHoareTripleChecker [86 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 781.11ms Time] [2021-11-13 17:50:22,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-13 17:50:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 208. [2021-11-13 17:50:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 175 states have (on average 1.3828571428571428) internal successors, (242), 204 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) [2021-11-13 17:50:22,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 245 transitions. [2021-11-13 17:50:22,797 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 245 transitions. Word has length 46 [2021-11-13 17:50:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:22,798 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 245 transitions. [2021-11-13 17:50:22,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 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) [2021-11-13 17:50:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 245 transitions. [2021-11-13 17:50:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 17:50:22,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:22,799 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:22,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:23,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 17:50:23,028 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1642176485, now seen corresponding path program 2 times [2021-11-13 17:50:23,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:23,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108595436] [2021-11-13 17:50:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:23,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:23,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:23,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:23,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108595436] [2021-11-13 17:50:23,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108595436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:23,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030274024] [2021-11-13 17:50:23,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:50:23,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:23,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:23,944 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:23,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:50:24,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:50:24,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:50:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-13 17:50:24,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:24,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-13 17:50:24,566 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 13 treesize of output 9 [2021-11-13 17:50:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:24,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 17:50:24,655 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:50:24,656 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 [2021-11-13 17:50:24,667 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 [2021-11-13 17:50:24,731 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 [2021-11-13 17:50:24,743 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 [2021-11-13 17:50:24,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:24,750 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 [2021-11-13 17:50:24,837 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 [2021-11-13 17:50:24,847 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 18 [2021-11-13 17:50:24,986 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 [2021-11-13 17:50:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:25,087 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 17:50:25,087 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 38 treesize of output 25 [2021-11-13 17:50:25,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,157 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-13 17:50:25,157 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 22 treesize of output 33 [2021-11-13 17:50:25,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-13 17:50:25,292 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 [2021-11-13 17:50:25,299 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 30 treesize of output 26 [2021-11-13 17:50:25,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:25,327 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 17:50:25,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-13 17:50:25,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2021-11-13 17:50:25,493 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 62 treesize of output 42 [2021-11-13 17:50:25,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:25,785 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:50:25,786 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 56 treesize of output 58 [2021-11-13 17:50:25,794 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 17:50:25,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2021-11-13 17:50:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:25,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:25,951 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 17:50:25,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2021-11-13 17:50:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:25,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:25,995 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 17:50:25,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 43 [2021-11-13 17:50:26,165 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-13 17:50:26,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 35 treesize of output 39 [2021-11-13 17:50:26,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:26,274 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-13 17:50:26,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 41 [2021-11-13 17:50:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:26,378 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-13 17:50:26,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 50 [2021-11-13 17:50:26,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.base] [2021-11-13 17:50:26,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:50:26,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-13 17:50:26,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109704157] [2021-11-13 17:50:26,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:26,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 17:50:26,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:26,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 17:50:26,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 17:50:26,504 INFO L87 Difference]: Start difference. First operand 208 states and 245 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2021-11-13 17:50:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:28,836 INFO L93 Difference]: Finished difference Result 287 states and 321 transitions. [2021-11-13 17:50:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 17:50:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 46 [2021-11-13 17:50:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:28,839 INFO L225 Difference]: With dead ends: 287 [2021-11-13 17:50:28,839 INFO L226 Difference]: Without dead ends: 287 [2021-11-13 17:50:28,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=424, Invalid=3358, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 17:50:28,842 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 807 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1063.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.04ms SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1264.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:28,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 884 Invalid, 1683 Unknown, 0 Unchecked, 13.04ms Time], IncrementalHoareTripleChecker [125 Valid, 1558 Invalid, 0 Unknown, 0 Unchecked, 1264.42ms Time] [2021-11-13 17:50:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-13 17:50:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 214. [2021-11-13 17:50:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 181 states have (on average 1.3812154696132597) internal successors, (250), 210 states have internal predecessors, (250), 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) [2021-11-13 17:50:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 253 transitions. [2021-11-13 17:50:28,852 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 253 transitions. Word has length 46 [2021-11-13 17:50:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:28,853 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 253 transitions. [2021-11-13 17:50:28,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2021-11-13 17:50:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 253 transitions. [2021-11-13 17:50:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 17:50:28,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:28,854 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:28,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:29,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 17:50:29,074 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:29,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1642176484, now seen corresponding path program 2 times [2021-11-13 17:50:29,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:29,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635321467] [2021-11-13 17:50:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:29,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:29,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:29,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:29,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635321467] [2021-11-13 17:50:29,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635321467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:29,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792550483] [2021-11-13 17:50:29,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:50:29,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:30,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:30,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:50:30,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:50:30,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:50:30,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 17:50:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:30,409 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 [2021-11-13 17:50:30,430 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 [2021-11-13 17:50:30,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:30,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 17:50:30,519 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:50:30,519 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 [2021-11-13 17:50:30,580 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 [2021-11-13 17:50:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:30,596 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 [2021-11-13 17:50:30,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-13 17:50:30,826 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 [2021-11-13 17:50:30,907 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 17:50:30,907 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 38 treesize of output 25 [2021-11-13 17:50:30,958 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-13 17:50:30,958 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 22 treesize of output 33 [2021-11-13 17:50:31,051 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:50:31,052 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 34 treesize of output 25 [2021-11-13 17:50:31,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 17:50:31,187 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 51 treesize of output 35 [2021-11-13 17:50:31,439 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-13 17:50:31,440 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 45 treesize of output 47 [2021-11-13 17:50:31,608 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-13 17:50:31,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 50 [2021-11-13 17:50:31,701 INFO L354 Elim1Store]: treesize reduction 142, result has 16.5 percent of original size [2021-11-13 17:50:31,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 59 [2021-11-13 17:50:32,095 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-13 17:50:32,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 51 treesize of output 55 [2021-11-13 17:50:32,287 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-11-13 17:50:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 57 [2021-11-13 17:50:32,608 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-11-13 17:50:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 66 [2021-11-13 17:50:32,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.base, main_~bcki~0.offset] [2021-11-13 17:50:32,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:50:32,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-13 17:50:32,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679056254] [2021-11-13 17:50:32,777 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:32,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 17:50:32,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 17:50:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 17:50:32,779 INFO L87 Difference]: Start difference. First operand 214 states and 253 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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) [2021-11-13 17:50:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:35,397 INFO L93 Difference]: Finished difference Result 304 states and 348 transitions. [2021-11-13 17:50:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 17:50:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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 46 [2021-11-13 17:50:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:35,400 INFO L225 Difference]: With dead ends: 304 [2021-11-13 17:50:35,400 INFO L226 Difference]: Without dead ends: 304 [2021-11-13 17:50:35,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=320, Invalid=2986, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 17:50:35,402 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 400 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1235.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.22ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1454.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:35,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1020 Invalid, 1776 Unknown, 0 Unchecked, 8.22ms Time], IncrementalHoareTripleChecker [66 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 1454.75ms Time] [2021-11-13 17:50:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-13 17:50:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 213. [2021-11-13 17:50:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 180 states have (on average 1.3777777777777778) internal successors, (248), 209 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) [2021-11-13 17:50:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2021-11-13 17:50:35,412 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 46 [2021-11-13 17:50:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:35,413 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2021-11-13 17:50:35,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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) [2021-11-13 17:50:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2021-11-13 17:50:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 17:50:35,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:35,414 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:35,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:35,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-13 17:50:35,624 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr45REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash 279023877, now seen corresponding path program 1 times [2021-11-13 17:50:35,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:35,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570124842] [2021-11-13 17:50:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:35,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:36,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:36,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:36,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570124842] [2021-11-13 17:50:36,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570124842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:36,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:36,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-13 17:50:36,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243860531] [2021-11-13 17:50:36,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:36,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:50:36,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:50:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:50:36,229 INFO L87 Difference]: Start difference. First operand 213 states and 251 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 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) [2021-11-13 17:50:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:37,487 INFO L93 Difference]: Finished difference Result 265 states and 308 transitions. [2021-11-13 17:50:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 17:50:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 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 50 [2021-11-13 17:50:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:37,489 INFO L225 Difference]: With dead ends: 265 [2021-11-13 17:50:37,490 INFO L226 Difference]: Without dead ends: 265 [2021-11-13 17:50:37,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 17:50:37,491 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 220 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 567.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 679.10ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:37,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 680 Invalid, 986 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [55 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 679.10ms Time] [2021-11-13 17:50:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-13 17:50:37,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 221. [2021-11-13 17:50:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 188 states have (on average 1.3617021276595744) internal successors, (256), 217 states have internal predecessors, (256), 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) [2021-11-13 17:50:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 259 transitions. [2021-11-13 17:50:37,500 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 259 transitions. Word has length 50 [2021-11-13 17:50:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:37,500 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 259 transitions. [2021-11-13 17:50:37,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 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) [2021-11-13 17:50:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 259 transitions. [2021-11-13 17:50:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:50:37,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:37,502 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:37,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 17:50:37,502 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr45REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:37,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:37,503 INFO L85 PathProgramCache]: Analyzing trace with hash 482742872, now seen corresponding path program 1 times [2021-11-13 17:50:37,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:37,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964823146] [2021-11-13 17:50:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:37,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:38,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:38,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:38,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964823146] [2021-11-13 17:50:38,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964823146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:38,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210954345] [2021-11-13 17:50:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:38,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:38,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:38,653 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:38,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 17:50:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:38,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-13 17:50:38,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:38,813 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 [2021-11-13 17:50:38,833 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 [2021-11-13 17:50:38,850 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:50:38,851 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 [2021-11-13 17:50:38,907 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 [2021-11-13 17:50:38,913 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 [2021-11-13 17:50:39,170 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-11-13 17:50:39,170 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 [2021-11-13 17:50:39,188 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 17:50:39,189 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 60 treesize of output 32 [2021-11-13 17:50:39,196 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-13 17:50:39,197 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 41 treesize of output 36 [2021-11-13 17:50:39,295 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 17:50:39,295 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 38 treesize of output 29 [2021-11-13 17:50:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:39,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:50:39,422 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-13 17:50:39,422 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 [2021-11-13 17:50:39,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:39,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:39,570 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-13 17:50:39,571 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 28 treesize of output 34 [2021-11-13 17:50:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:39,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:39,601 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 17:50:39,602 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 62 treesize of output 52 [2021-11-13 17:50:40,060 INFO L354 Elim1Store]: treesize reduction 144, result has 14.3 percent of original size [2021-11-13 17:50:40,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 92 [2021-11-13 17:50:40,085 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-13 17:50:40,085 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 120 treesize of output 107 [2021-11-13 17:50:40,260 INFO L354 Elim1Store]: treesize reduction 126, result has 16.0 percent of original size [2021-11-13 17:50:40,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 95 [2021-11-13 17:50:40,290 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-11-13 17:50:40,290 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 123 treesize of output 125 [2021-11-13 17:50:40,543 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-11-13 17:50:40,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 178 treesize of output 112 [2021-11-13 17:50:40,592 INFO L354 Elim1Store]: treesize reduction 196, result has 16.2 percent of original size [2021-11-13 17:50:40,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 163 [2021-11-13 17:50:43,306 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 [2021-11-13 17:50:43,332 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-13 17:50:43,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 157 treesize of output 161 [2021-11-13 17:50:43,577 INFO L354 Elim1Store]: treesize reduction 236, result has 12.3 percent of original size [2021-11-13 17:50:43,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 174 treesize of output 127 [2021-11-13 17:50:43,640 INFO L354 Elim1Store]: treesize reduction 268, result has 14.6 percent of original size [2021-11-13 17:50:43,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 170 treesize of output 178 [2021-11-13 17:50:44,202 INFO L354 Elim1Store]: treesize reduction 400, result has 10.5 percent of original size [2021-11-13 17:50:44,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 213 treesize of output 154 [2021-11-13 17:50:44,277 INFO L354 Elim1Store]: treesize reduction 430, result has 12.2 percent of original size [2021-11-13 17:50:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 194 treesize of output 190 [2021-11-13 17:50:44,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:50:44,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:50:44,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-13 17:50:44,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94771433] [2021-11-13 17:50:44,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:44,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 17:50:44,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 17:50:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1299, Unknown=1, NotChecked=0, Total=1482 [2021-11-13 17:50:44,544 INFO L87 Difference]: Start difference. First operand 221 states and 259 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 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) [2021-11-13 17:50:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:47,126 INFO L93 Difference]: Finished difference Result 280 states and 319 transitions. [2021-11-13 17:50:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 17:50:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 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 51 [2021-11-13 17:50:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:47,128 INFO L225 Difference]: With dead ends: 280 [2021-11-13 17:50:47,129 INFO L226 Difference]: Without dead ends: 280 [2021-11-13 17:50:47,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=387, Invalid=2913, Unknown=6, NotChecked=0, Total=3306 [2021-11-13 17:50:47,130 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 440 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1184.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.80ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1385.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:47,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 802 Invalid, 1437 Unknown, 0 Unchecked, 7.80ms Time], IncrementalHoareTripleChecker [95 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1385.63ms Time] [2021-11-13 17:50:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-13 17:50:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 221. [2021-11-13 17:50:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 188 states have (on average 1.3617021276595744) internal successors, (256), 217 states have internal predecessors, (256), 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) [2021-11-13 17:50:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 259 transitions. [2021-11-13 17:50:47,139 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 259 transitions. Word has length 51 [2021-11-13 17:50:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:47,140 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 259 transitions. [2021-11-13 17:50:47,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 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) [2021-11-13 17:50:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 259 transitions. [2021-11-13 17:50:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 17:50:47,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:47,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:47,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-13 17:50:47,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 17:50:47,362 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr69ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:50:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:47,363 INFO L85 PathProgramCache]: Analyzing trace with hash 319239086, now seen corresponding path program 1 times [2021-11-13 17:50:47,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:47,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647380627] [2021-11-13 17:50:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:47,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:50:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:47,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:47,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647380627] [2021-11-13 17:50:47,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647380627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:47,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419567398] [2021-11-13 17:50:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:47,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:47,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:47,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:47,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 17:50:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:48,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 17:50:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:48,019 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 [2021-11-13 17:50:48,047 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:50:48,047 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 [2021-11-13 17:50:48,065 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 [2021-11-13 17:50:48,220 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 17:50:48,221 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 [2021-11-13 17:50:48,283 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 17:50:48,283 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 38 treesize of output 29 [2021-11-13 17:50:48,373 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:50:48,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 17:50:48,435 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-13 17:50:48,436 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 32 treesize of output 34 [2021-11-13 17:50:48,665 INFO L354 Elim1Store]: treesize reduction 124, result has 26.2 percent of original size [2021-11-13 17:50:48,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 66 [2021-11-13 17:50:48,825 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-13 17:50:48,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 81 [2021-11-13 17:50:49,098 INFO L354 Elim1Store]: treesize reduction 172, result has 19.2 percent of original size [2021-11-13 17:50:49,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 102 [2021-11-13 17:51:04,611 WARN L227 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 49 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:51:04,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:51:04,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:51:04,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-13 17:51:04,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773046286] [2021-11-13 17:51:04,969 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:51:04,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 17:51:04,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:04,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 17:51:04,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=627, Unknown=5, NotChecked=0, Total=756 [2021-11-13 17:51:04,971 INFO L87 Difference]: Start difference. First operand 221 states and 259 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-11-13 17:51:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:06,095 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2021-11-13 17:51:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 17:51:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 52 [2021-11-13 17:51:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:06,098 INFO L225 Difference]: With dead ends: 286 [2021-11-13 17:51:06,098 INFO L226 Difference]: Without dead ends: 286 [2021-11-13 17:51:06,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=324, Invalid=1833, Unknown=5, NotChecked=0, Total=2162 [2021-11-13 17:51:06,099 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 375 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 571.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.28ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 692.55ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:06,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 737 Invalid, 1002 Unknown, 0 Unchecked, 5.28ms Time], IncrementalHoareTripleChecker [68 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 692.55ms Time] [2021-11-13 17:51:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-13 17:51:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 221. [2021-11-13 17:51:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 188 states have (on average 1.3617021276595744) internal successors, (256), 217 states have internal predecessors, (256), 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) [2021-11-13 17:51:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 259 transitions. [2021-11-13 17:51:06,108 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 259 transitions. Word has length 52 [2021-11-13 17:51:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:06,108 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 259 transitions. [2021-11-13 17:51:06,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-11-13 17:51:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 259 transitions. [2021-11-13 17:51:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 17:51:06,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:06,110 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:06,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 17:51:06,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:51:06,332 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr55REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:51:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1269130708, now seen corresponding path program 1 times [2021-11-13 17:51:06,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:06,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521865392] [2021-11-13 17:51:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:06,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:51:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:51:07,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:07,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521865392] [2021-11-13 17:51:07,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521865392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:51:07,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900526259] [2021-11-13 17:51:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:07,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:51:07,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:51:07,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:51:07,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 17:51:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:07,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 17:51:07,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:51:07,540 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 [2021-11-13 17:51:07,824 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 19 treesize of output 15 [2021-11-13 17:51:07,913 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 17 treesize of output 9 [2021-11-13 17:51:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:51:07,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:51:07,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900526259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:07,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:51:07,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [24] total 29 [2021-11-13 17:51:07,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586157954] [2021-11-13 17:51:07,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:07,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:51:07,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:51:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-11-13 17:51:07,943 INFO L87 Difference]: Start difference. First operand 221 states and 259 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 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) [2021-11-13 17:51:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:08,364 INFO L93 Difference]: Finished difference Result 279 states and 325 transitions. [2021-11-13 17:51:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:51:08,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 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 52 [2021-11-13 17:51:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:08,366 INFO L225 Difference]: With dead ends: 279 [2021-11-13 17:51:08,366 INFO L226 Difference]: Without dead ends: 279 [2021-11-13 17:51:08,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-11-13 17:51:08,367 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 237 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 320.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:08,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 393 Invalid, 413 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [26 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 320.57ms Time] [2021-11-13 17:51:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-13 17:51:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 242. [2021-11-13 17:51:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 209 states have (on average 1.3492822966507176) internal successors, (282), 238 states have internal predecessors, (282), 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) [2021-11-13 17:51:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 285 transitions. [2021-11-13 17:51:08,377 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 285 transitions. Word has length 52 [2021-11-13 17:51:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:08,377 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 285 transitions. [2021-11-13 17:51:08,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 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) [2021-11-13 17:51:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 285 transitions. [2021-11-13 17:51:08,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 17:51:08,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:08,379 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:08,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 17:51:08,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 17:51:08,600 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr56REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:51:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1269130707, now seen corresponding path program 1 times [2021-11-13 17:51:08,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:08,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643947134] [2021-11-13 17:51:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:08,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:08,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:51:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:51:08,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:08,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643947134] [2021-11-13 17:51:08,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643947134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:51:08,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:51:08,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 17:51:08,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638922996] [2021-11-13 17:51:08,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:51:08,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:51:08,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:08,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:51:08,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:51:08,835 INFO L87 Difference]: Start difference. First operand 242 states and 285 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2021-11-13 17:51:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:09,428 INFO L93 Difference]: Finished difference Result 292 states and 340 transitions. [2021-11-13 17:51:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:51:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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 52 [2021-11-13 17:51:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:09,430 INFO L225 Difference]: With dead ends: 292 [2021-11-13 17:51:09,430 INFO L226 Difference]: Without dead ends: 292 [2021-11-13 17:51:09,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:51:09,431 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 335 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 411.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.07ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 493.90ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:09,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 440 Invalid, 640 Unknown, 0 Unchecked, 4.07ms Time], IncrementalHoareTripleChecker [38 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 493.90ms Time] [2021-11-13 17:51:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-13 17:51:09,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 242. [2021-11-13 17:51:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 209 states have (on average 1.3444976076555024) internal successors, (281), 238 states have internal predecessors, (281), 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) [2021-11-13 17:51:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2021-11-13 17:51:09,441 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 52 [2021-11-13 17:51:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:09,442 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2021-11-13 17:51:09,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2021-11-13 17:51:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2021-11-13 17:51:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 17:51:09,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:09,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-13 17:51:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 17:51:09,444 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:51:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:09,444 INFO L85 PathProgramCache]: Analyzing trace with hash 30758949, now seen corresponding path program 1 times [2021-11-13 17:51:09,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:09,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604987179] [2021-11-13 17:51:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:09,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:10,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:51:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:51:10,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:10,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604987179] [2021-11-13 17:51:10,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604987179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:51:10,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591565619] [2021-11-13 17:51:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:10,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:51:10,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:51:10,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:51:10,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 17:51:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:10,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-13 17:51:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:51:10,771 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 [2021-11-13 17:51:10,811 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 [2021-11-13 17:51:10,827 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:51:10,828 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 [2021-11-13 17:51:10,884 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 [2021-11-13 17:51:10,897 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 [2021-11-13 17:51:11,169 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 17:51:11,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2021-11-13 17:51:11,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 25 [2021-11-13 17:51:11,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2021-11-13 17:51:11,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:51:11,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:11,230 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 29 treesize of output 13 [2021-11-13 17:51:11,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:11,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:51:11,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:11,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:51:11,368 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-13 17:51:11,368 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 16 treesize of output 18 [2021-11-13 17:51:11,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:11,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-13 17:51:11,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:11,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-13 17:51:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:11,500 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 [2021-11-13 17:51:11,802 INFO L354 Elim1Store]: treesize reduction 110, result has 16.7 percent of original size [2021-11-13 17:51:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 92 [2021-11-13 17:51:11,828 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-13 17:51:11,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 99 [2021-11-13 17:51:11,840 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-13 17:51:11,840 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 93 treesize of output 92 [2021-11-13 17:51:11,972 INFO L354 Elim1Store]: treesize reduction 92, result has 19.3 percent of original size [2021-11-13 17:51:11,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 110 [2021-11-13 17:51:11,995 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-13 17:51:11,996 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 114 treesize of output 101 [2021-11-13 17:51:12,015 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-13 17:51:12,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 97 [2021-11-13 17:51:12,209 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-11-13 17:51:12,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 123 [2021-11-13 17:51:12,254 INFO L354 Elim1Store]: treesize reduction 170, result has 17.5 percent of original size [2021-11-13 17:51:12,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 198 [2021-11-13 17:51:12,290 INFO L354 Elim1Store]: treesize reduction 132, result has 18.0 percent of original size [2021-11-13 17:51:12,291 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 189 treesize of output 156 [2021-11-13 17:51:12,582 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 [2021-11-13 17:51:12,807 INFO L354 Elim1Store]: treesize reduction 202, result has 22.3 percent of original size [2021-11-13 17:51:12,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 187 treesize of output 160 [2021-11-13 17:51:12,851 INFO L354 Elim1Store]: treesize reduction 58, result has 37.6 percent of original size [2021-11-13 17:51:12,852 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 145 treesize of output 154 [2021-11-13 17:51:12,905 INFO L354 Elim1Store]: treesize reduction 164, result has 15.9 percent of original size [2021-11-13 17:51:12,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 156 [2021-11-13 17:51:18,033 INFO L354 Elim1Store]: treesize reduction 314, result has 22.5 percent of original size [2021-11-13 17:51:18,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 195 treesize of output 240 [2021-11-13 17:51:18,156 INFO L354 Elim1Store]: treesize reduction 244, result has 23.3 percent of original size [2021-11-13 17:51:18,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 228 treesize of output 260 [2021-11-13 17:51:18,221 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-13 17:51:18,222 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 245 treesize of output 257 [2021-11-13 17:51:30,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:51:30,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:51:30,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-13 17:51:30,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122111321] [2021-11-13 17:51:30,329 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:51:30,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 17:51:30,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:51:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 17:51:30,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 17:51:30,331 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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) [2021-11-13 17:51:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:33,247 INFO L93 Difference]: Finished difference Result 315 states and 357 transitions. [2021-11-13 17:51:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 17:51:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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 52 [2021-11-13 17:51:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:33,249 INFO L225 Difference]: With dead ends: 315 [2021-11-13 17:51:33,249 INFO L226 Difference]: Without dead ends: 314 [2021-11-13 17:51:33,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=334, Invalid=2972, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 17:51:33,251 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 292 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1194.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.96ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1407.41ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:33,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 932 Invalid, 1615 Unknown, 0 Unchecked, 7.96ms Time], IncrementalHoareTripleChecker [56 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 1407.41ms Time] [2021-11-13 17:51:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-13 17:51:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 255. [2021-11-13 17:51:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 222 states have (on average 1.3288288288288288) internal successors, (295), 251 states have internal predecessors, (295), 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) [2021-11-13 17:51:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 298 transitions. [2021-11-13 17:51:33,259 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 298 transitions. Word has length 52 [2021-11-13 17:51:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:33,260 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 298 transitions. [2021-11-13 17:51:33,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 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) [2021-11-13 17:51:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 298 transitions. [2021-11-13 17:51:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 17:51:33,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:33,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-13 17:51:33,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 17:51:33,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-13 17:51:33,480 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:51:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash 359267205, now seen corresponding path program 1 times [2021-11-13 17:51:33,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:51:33,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580517818] [2021-11-13 17:51:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:33,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:51:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:34,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:51:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:51:34,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:51:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580517818] [2021-11-13 17:51:34,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580517818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:51:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996723521] [2021-11-13 17:51:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:34,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:51:34,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:51:34,764 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:51:34,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 17:51:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:34,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-13 17:51:34,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:51:34,975 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 [2021-11-13 17:51:35,007 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:51:35,007 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 [2021-11-13 17:51:35,062 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 [2021-11-13 17:51:35,069 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 [2021-11-13 17:51:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-13 17:51:35,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,251 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 [2021-11-13 17:51:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:51:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:51:35,400 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-13 17:51:35,401 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 22 treesize of output 33 [2021-11-13 17:51:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-13 17:51:35,560 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-13 17:51:35,560 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 28 treesize of output 30 [2021-11-13 17:51:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 48 [2021-11-13 17:51:36,073 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 [2021-11-13 17:51:36,125 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-13 17:51:36,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 122 [2021-11-13 17:51:36,161 INFO L354 Elim1Store]: treesize reduction 166, result has 15.3 percent of original size [2021-11-13 17:51:36,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 110 [2021-11-13 17:51:36,372 INFO L354 Elim1Store]: treesize reduction 138, result has 15.3 percent of original size [2021-11-13 17:51:36,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-11-13 17:51:36,398 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-11-13 17:51:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 111 [2021-11-13 17:51:36,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:36,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 17:51:36,636 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-13 17:51:36,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 405 treesize of output 217 [2021-11-13 17:51:36,689 INFO L354 Elim1Store]: treesize reduction 196, result has 15.9 percent of original size [2021-11-13 17:51:36,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 389 treesize of output 252 [2021-11-13 17:51:36,706 INFO L354 Elim1Store]: treesize reduction 123, result has 21.2 percent of original size [2021-11-13 17:51:36,706 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 373 treesize of output 301 [2021-11-13 17:51:37,059 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-11-13 17:51:37,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2021-11-13 17:51:37,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-11-13 17:51:37,369 INFO L354 Elim1Store]: treesize reduction 278, result has 12.3 percent of original size [2021-11-13 17:51:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 317 treesize of output 212 [2021-11-13 17:51:37,431 INFO L354 Elim1Store]: treesize reduction 256, result has 12.6 percent of original size [2021-11-13 17:51:37,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 313 treesize of output 231 [2021-11-13 17:51:37,448 INFO L354 Elim1Store]: treesize reduction 107, result has 23.6 percent of original size [2021-11-13 17:51:37,448 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 1 case distinctions, treesize of input 309 treesize of output 297 [2021-11-13 17:51:38,003 INFO L354 Elim1Store]: treesize reduction 402, result has 10.3 percent of original size [2021-11-13 17:51:38,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 345 treesize of output 228 [2021-11-13 17:51:38,085 INFO L354 Elim1Store]: treesize reduction 378, result has 10.4 percent of original size [2021-11-13 17:51:38,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 19 case distinctions, treesize of input 326 treesize of output 232 [2021-11-13 17:51:38,101 INFO L354 Elim1Store]: treesize reduction 65, result has 22.6 percent of original size [2021-11-13 17:51:38,101 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 1 case distinctions, treesize of input 241 treesize of output 240 [2021-11-13 17:51:40,073 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-13 17:51:40,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 253 treesize of output 253 [2021-11-13 17:51:40,890 INFO L354 Elim1Store]: treesize reduction 392, result has 1.8 percent of original size [2021-11-13 17:51:40,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 274 treesize of output 131 [2021-11-13 17:51:40,961 INFO L354 Elim1Store]: treesize reduction 286, result has 2.4 percent of original size [2021-11-13 17:51:40,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 101 treesize of output 76 [2021-11-13 17:51:41,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:51:41,190 INFO L354 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2021-11-13 17:51:41,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 20 [2021-11-13 17:51:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:51:41,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:52:00,992 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 565872 treesize of output 555504 [2021-11-13 17:52:02,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 17:52:02,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:52:02,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-13 17:52:02,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794958917] [2021-11-13 17:52:02,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:52:02,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 17:52:02,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 17:52:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=3737, Unknown=7, NotChecked=0, Total=4032 [2021-11-13 17:52:02,805 INFO L87 Difference]: Start difference. First operand 255 states and 298 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 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) [2021-11-13 17:52:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:08,168 INFO L93 Difference]: Finished difference Result 298 states and 337 transitions. [2021-11-13 17:52:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 17:52:08,169 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 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 52 [2021-11-13 17:52:08,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:08,171 INFO L225 Difference]: With dead ends: 298 [2021-11-13 17:52:08,171 INFO L226 Difference]: Without dead ends: 297 [2021-11-13 17:52:08,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=588, Invalid=6715, Unknown=7, NotChecked=0, Total=7310 [2021-11-13 17:52:08,175 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 391 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2056.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.25ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2405.60ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:08,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1270 Invalid, 2120 Unknown, 0 Unchecked, 12.25ms Time], IncrementalHoareTripleChecker [57 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 2405.60ms Time] [2021-11-13 17:52:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-13 17:52:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 255. [2021-11-13 17:52:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 222 states have (on average 1.3243243243243243) internal successors, (294), 251 states have internal predecessors, (294), 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) [2021-11-13 17:52:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 297 transitions. [2021-11-13 17:52:08,184 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 297 transitions. Word has length 52 [2021-11-13 17:52:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:08,185 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 297 transitions. [2021-11-13 17:52:08,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 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) [2021-11-13 17:52:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 297 transitions. [2021-11-13 17:52:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-13 17:52:08,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:08,187 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:08,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 17:52:08,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-13 17:52:08,412 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr57REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:52:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash 136108016, now seen corresponding path program 1 times [2021-11-13 17:52:08,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:08,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900561216] [2021-11-13 17:52:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:08,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:08,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:52:08,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:08,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900561216] [2021-11-13 17:52:08,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900561216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:08,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:08,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:52:08,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463444796] [2021-11-13 17:52:08,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:08,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:52:08,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:52:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:52:08,496 INFO L87 Difference]: Start difference. First operand 255 states and 297 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-13 17:52:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:08,882 INFO L93 Difference]: Finished difference Result 328 states and 377 transitions. [2021-11-13 17:52:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:52:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 54 [2021-11-13 17:52:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:08,885 INFO L225 Difference]: With dead ends: 328 [2021-11-13 17:52:08,885 INFO L226 Difference]: Without dead ends: 328 [2021-11-13 17:52:08,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:52:08,886 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 109 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 301.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.69ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 362.58ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:08,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 252 Invalid, 325 Unknown, 0 Unchecked, 2.69ms Time], IncrementalHoareTripleChecker [8 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 362.58ms Time] [2021-11-13 17:52:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-13 17:52:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 251. [2021-11-13 17:52:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 222 states have (on average 1.2882882882882882) internal successors, (286), 247 states have internal predecessors, (286), 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) [2021-11-13 17:52:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 289 transitions. [2021-11-13 17:52:08,894 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 289 transitions. Word has length 54 [2021-11-13 17:52:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:08,894 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 289 transitions. [2021-11-13 17:52:08,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-11-13 17:52:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 289 transitions. [2021-11-13 17:52:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-13 17:52:08,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:08,896 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:08,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-13 17:52:08,897 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr58REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:52:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash 136108017, now seen corresponding path program 1 times [2021-11-13 17:52:08,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:08,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116619833] [2021-11-13 17:52:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:08,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:09,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:09,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:09,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116619833] [2021-11-13 17:52:09,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116619833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:09,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:09,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 17:52:09,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889002621] [2021-11-13 17:52:09,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:09,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:52:09,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:09,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:52:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:52:09,192 INFO L87 Difference]: Start difference. First operand 251 states and 289 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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) [2021-11-13 17:52:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:10,038 INFO L93 Difference]: Finished difference Result 339 states and 386 transitions. [2021-11-13 17:52:10,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 17:52:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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 54 [2021-11-13 17:52:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:10,041 INFO L225 Difference]: With dead ends: 339 [2021-11-13 17:52:10,042 INFO L226 Difference]: Without dead ends: 339 [2021-11-13 17:52:10,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:52:10,043 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 331 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 586.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.59ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 695.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:10,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 527 Invalid, 858 Unknown, 0 Unchecked, 5.59ms Time], IncrementalHoareTripleChecker [39 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 695.38ms Time] [2021-11-13 17:52:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-13 17:52:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 257. [2021-11-13 17:52:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 228 states have (on average 1.2850877192982457) internal successors, (293), 253 states have internal predecessors, (293), 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) [2021-11-13 17:52:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 296 transitions. [2021-11-13 17:52:10,053 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 296 transitions. Word has length 54 [2021-11-13 17:52:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:10,053 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 296 transitions. [2021-11-13 17:52:10,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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) [2021-11-13 17:52:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 296 transitions. [2021-11-13 17:52:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 17:52:10,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:10,055 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:10,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-13 17:52:10,056 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr51REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:52:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1394331860, now seen corresponding path program 2 times [2021-11-13 17:52:10,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:10,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70915002] [2021-11-13 17:52:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:10,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:11,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:11,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70915002] [2021-11-13 17:52:11,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70915002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:52:11,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214761350] [2021-11-13 17:52:11,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:52:11,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:11,072 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:11,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 17:52:11,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:52:11,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:52:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-13 17:52:11,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:11,464 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 [2021-11-13 17:52:11,495 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:52:11,495 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 [2021-11-13 17:52:11,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-13 17:52:11,557 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 [2021-11-13 17:52:11,564 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 [2021-11-13 17:52:11,636 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 [2021-11-13 17:52:11,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:11,774 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 60 treesize of output 32 [2021-11-13 17:52:11,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 25 [2021-11-13 17:52:11,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:11,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:52:11,916 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-13 17:52:11,917 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 22 treesize of output 33 [2021-11-13 17:52:12,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:12,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2021-11-13 17:52:12,351 INFO L354 Elim1Store]: treesize reduction 110, result has 16.7 percent of original size [2021-11-13 17:52:12,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 49 [2021-11-13 17:52:12,411 INFO L354 Elim1Store]: treesize reduction 92, result has 19.3 percent of original size [2021-11-13 17:52:12,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 58 [2021-11-13 17:52:12,548 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-11-13 17:52:12,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 68 [2021-11-13 17:52:12,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:52:12,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:52:12,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-13 17:52:12,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488916359] [2021-11-13 17:52:12,767 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:52:12,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 17:52:12,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 17:52:12,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 17:52:12,769 INFO L87 Difference]: Start difference. First operand 257 states and 296 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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) [2021-11-13 17:52:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:14,950 INFO L93 Difference]: Finished difference Result 288 states and 319 transitions. [2021-11-13 17:52:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 17:52:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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 55 [2021-11-13 17:52:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:14,953 INFO L225 Difference]: With dead ends: 288 [2021-11-13 17:52:14,953 INFO L226 Difference]: Without dead ends: 288 [2021-11-13 17:52:14,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=439, Invalid=3467, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 17:52:14,954 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 325 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 972.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.90ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1173.12ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:14,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 964 Invalid, 1563 Unknown, 0 Unchecked, 7.90ms Time], IncrementalHoareTripleChecker [97 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1173.12ms Time] [2021-11-13 17:52:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-13 17:52:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 267. [2021-11-13 17:52:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 238 states have (on average 1.281512605042017) internal successors, (305), 263 states have internal predecessors, (305), 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) [2021-11-13 17:52:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 308 transitions. [2021-11-13 17:52:14,964 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 308 transitions. Word has length 55 [2021-11-13 17:52:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:14,964 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 308 transitions. [2021-11-13 17:52:14,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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) [2021-11-13 17:52:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 308 transitions. [2021-11-13 17:52:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 17:52:14,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:14,966 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:15,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 17:52:15,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:15,180 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:52:15,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:15,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1394331861, now seen corresponding path program 2 times [2021-11-13 17:52:15,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:15,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192892882] [2021-11-13 17:52:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:15,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:16,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:16,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:16,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192892882] [2021-11-13 17:52:16,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192892882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:52:16,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355739384] [2021-11-13 17:52:16,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:52:16,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:16,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:16,084 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:16,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 17:52:16,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:52:16,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:52:16,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-13 17:52:16,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:16,464 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 [2021-11-13 17:52:16,505 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:52:16,505 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 [2021-11-13 17:52:16,513 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 [2021-11-13 17:52:16,567 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 [2021-11-13 17:52:16,575 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 [2021-11-13 17:52:16,655 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 [2021-11-13 17:52:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:16,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-11-13 17:52:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:16,874 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 47 treesize of output 34 [2021-11-13 17:52:16,974 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-13 17:52:16,975 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 16 treesize of output 18 [2021-11-13 17:52:16,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-13 17:52:17,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:52:17,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:17,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2021-11-13 17:52:17,387 INFO L354 Elim1Store]: treesize reduction 110, result has 16.7 percent of original size [2021-11-13 17:52:17,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 75 [2021-11-13 17:52:17,399 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-13 17:52:17,399 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 79 treesize of output 63 [2021-11-13 17:52:17,498 INFO L354 Elim1Store]: treesize reduction 92, result has 19.3 percent of original size [2021-11-13 17:52:17,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 78 [2021-11-13 17:52:17,519 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-13 17:52:17,519 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 82 treesize of output 81 [2021-11-13 17:52:17,660 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-11-13 17:52:17,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 161 treesize of output 95 [2021-11-13 17:52:17,683 INFO L354 Elim1Store]: treesize reduction 108, result has 21.2 percent of original size [2021-11-13 17:52:17,683 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 149 treesize of output 143 [2021-11-13 17:52:17,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:52:17,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:52:17,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-13 17:52:17,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076892534] [2021-11-13 17:52:17,934 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:52:17,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 17:52:17,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:17,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 17:52:17,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 17:52:17,936 INFO L87 Difference]: Start difference. First operand 267 states and 308 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 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) [2021-11-13 17:52:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:20,080 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2021-11-13 17:52:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 17:52:20,092 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 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 55 [2021-11-13 17:52:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:20,094 INFO L225 Difference]: With dead ends: 318 [2021-11-13 17:52:20,095 INFO L226 Difference]: Without dead ends: 318 [2021-11-13 17:52:20,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=298, Invalid=2564, Unknown=0, NotChecked=0, Total=2862 [2021-11-13 17:52:20,096 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 298 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1095.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.43ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1283.64ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:20,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1271 Invalid, 1750 Unknown, 0 Unchecked, 8.43ms Time], IncrementalHoareTripleChecker [69 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 1283.64ms Time] [2021-11-13 17:52:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-13 17:52:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 294. [2021-11-13 17:52:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 265 states have (on average 1.2981132075471697) internal successors, (344), 290 states have internal predecessors, (344), 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) [2021-11-13 17:52:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 347 transitions. [2021-11-13 17:52:20,106 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 347 transitions. Word has length 55 [2021-11-13 17:52:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:20,107 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 347 transitions. [2021-11-13 17:52:20,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 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) [2021-11-13 17:52:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 347 transitions. [2021-11-13 17:52:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 17:52:20,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:20,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:20,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-13 17:52:20,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:20,324 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr71ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:52:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash 274615646, now seen corresponding path program 2 times [2021-11-13 17:52:20,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:20,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096178636] [2021-11-13 17:52:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:20,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:21,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:21,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:21,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096178636] [2021-11-13 17:52:21,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096178636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:52:21,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798862612] [2021-11-13 17:52:21,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:52:21,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:21,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:21,040 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:21,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 17:52:21,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:52:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:52:21,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-13 17:52:21,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:21,460 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 [2021-11-13 17:52:21,497 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:52:21,497 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 [2021-11-13 17:52:21,548 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 [2021-11-13 17:52:21,557 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 [2021-11-13 17:52:21,655 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 [2021-11-13 17:52:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:21,798 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 [2021-11-13 17:52:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:21,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:52:21,962 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-13 17:52:21,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-13 17:52:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:22,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-13 17:52:22,298 INFO L354 Elim1Store]: treesize reduction 110, result has 16.7 percent of original size [2021-11-13 17:52:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 43 [2021-11-13 17:52:22,369 INFO L354 Elim1Store]: treesize reduction 92, result has 19.3 percent of original size [2021-11-13 17:52:22,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 52 [2021-11-13 17:52:22,496 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-11-13 17:52:22,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 62 [2021-11-13 17:52:22,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:52:22,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:52:22,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-13 17:52:22,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982397293] [2021-11-13 17:52:22,655 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:52:22,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 17:52:22,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 17:52:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 17:52:22,663 INFO L87 Difference]: Start difference. First operand 294 states and 347 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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) [2021-11-13 17:52:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:24,302 INFO L93 Difference]: Finished difference Result 315 states and 356 transitions. [2021-11-13 17:52:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 17:52:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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 56 [2021-11-13 17:52:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:24,306 INFO L225 Difference]: With dead ends: 315 [2021-11-13 17:52:24,306 INFO L226 Difference]: Without dead ends: 315 [2021-11-13 17:52:24,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 17:52:24,307 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 289 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 833.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.24ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 997.62ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:24,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1351 Invalid, 1462 Unknown, 0 Unchecked, 7.24ms Time], IncrementalHoareTripleChecker [59 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 997.62ms Time] [2021-11-13 17:52:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-13 17:52:24,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 294. [2021-11-13 17:52:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 265 states have (on average 1.2943396226415094) internal successors, (343), 290 states have internal predecessors, (343), 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) [2021-11-13 17:52:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 346 transitions. [2021-11-13 17:52:24,317 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 346 transitions. Word has length 56 [2021-11-13 17:52:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:24,318 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 346 transitions. [2021-11-13 17:52:24,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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) [2021-11-13 17:52:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 346 transitions. [2021-11-13 17:52:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 17:52:24,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:24,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:24,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 17:52:24,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:24,536 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr45REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:52:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2021484399, now seen corresponding path program 1 times [2021-11-13 17:52:24,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:24,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102005356] [2021-11-13 17:52:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:24,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:25,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:25,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102005356] [2021-11-13 17:52:25,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102005356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:52:25,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528366701] [2021-11-13 17:52:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:25,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:25,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:25,843 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:25,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 17:52:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-13 17:52:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:26,006 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 [2021-11-13 17:52:26,041 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:52:26,041 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 [2021-11-13 17:52:26,102 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 [2021-11-13 17:52:26,111 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 [2021-11-13 17:52:26,336 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-13 17:52:26,336 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 [2021-11-13 17:52:26,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:26,350 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 [2021-11-13 17:52:26,373 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 17:52:26,373 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 38 treesize of output 29 [2021-11-13 17:52:26,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-13 17:52:26,501 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-13 17:52:26,502 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 22 treesize of output 33 [2021-11-13 17:52:26,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-11-13 17:52:26,646 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-13 17:52:26,646 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 28 treesize of output 30 [2021-11-13 17:52:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:26,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 48 [2021-11-13 17:52:27,154 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-13 17:52:27,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 111 [2021-11-13 17:52:27,190 INFO L354 Elim1Store]: treesize reduction 166, result has 15.3 percent of original size [2021-11-13 17:52:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 107 [2021-11-13 17:52:27,366 INFO L354 Elim1Store]: treesize reduction 138, result has 15.3 percent of original size [2021-11-13 17:52:27,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-11-13 17:52:27,392 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-11-13 17:52:27,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 111 [2021-11-13 17:52:27,621 INFO L354 Elim1Store]: treesize reduction 228, result has 15.2 percent of original size [2021-11-13 17:52:27,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 271 treesize of output 141 [2021-11-13 17:52:27,672 INFO L354 Elim1Store]: treesize reduction 208, result has 15.8 percent of original size [2021-11-13 17:52:27,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 255 treesize of output 208 [2021-11-13 17:52:28,047 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-11-13 17:52:28,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2021-11-13 17:52:28,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 114 [2021-11-13 17:52:28,429 INFO L354 Elim1Store]: treesize reduction 292, result has 12.3 percent of original size [2021-11-13 17:52:28,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 243 treesize of output 152 [2021-11-13 17:52:28,499 INFO L354 Elim1Store]: treesize reduction 270, result has 12.6 percent of original size [2021-11-13 17:52:28,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 239 treesize of output 211 [2021-11-13 17:52:29,117 INFO L354 Elim1Store]: treesize reduction 464, result has 10.6 percent of original size [2021-11-13 17:52:29,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 282 treesize of output 179 [2021-11-13 17:52:29,264 INFO L354 Elim1Store]: treesize reduction 440, result has 10.8 percent of original size [2021-11-13 17:52:29,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 263 treesize of output 223 [2021-11-13 17:52:29,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~bcki~0.offset] [2021-11-13 17:52:29,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:52:29,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-13 17:52:29,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411809741] [2021-11-13 17:52:29,548 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:52:29,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 17:52:29,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:29,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 17:52:29,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1559, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 17:52:29,549 INFO L87 Difference]: Start difference. First operand 294 states and 346 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 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) [2021-11-13 17:52:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:33,463 INFO L93 Difference]: Finished difference Result 308 states and 356 transitions. [2021-11-13 17:52:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 17:52:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 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 56 [2021-11-13 17:52:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:33,465 INFO L225 Difference]: With dead ends: 308 [2021-11-13 17:52:33,465 INFO L226 Difference]: Without dead ends: 308 [2021-11-13 17:52:33,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=386, Invalid=3520, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 17:52:33,466 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 303 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1422.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.69ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1647.94ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:33,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 1096 Invalid, 1536 Unknown, 0 Unchecked, 8.69ms Time], IncrementalHoareTripleChecker [77 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 1647.94ms Time] [2021-11-13 17:52:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-13 17:52:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 285. [2021-11-13 17:52:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 256 states have (on average 1.30078125) internal successors, (333), 281 states have internal predecessors, (333), 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) [2021-11-13 17:52:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 336 transitions. [2021-11-13 17:52:33,474 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 336 transitions. Word has length 56 [2021-11-13 17:52:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:33,475 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 336 transitions. [2021-11-13 17:52:33,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 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) [2021-11-13 17:52:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 336 transitions. [2021-11-13 17:52:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 17:52:33,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:33,477 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:52:33,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 17:52:33,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-13 17:52:33,692 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr61ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:52:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:33,692 INFO L85 PathProgramCache]: Analyzing trace with hash 344980957, now seen corresponding path program 1 times [2021-11-13 17:52:33,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:33,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200929939] [2021-11-13 17:52:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:33,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:34,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:34,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:34,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200929939] [2021-11-13 17:52:34,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200929939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:52:34,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:52:34,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-13 17:52:34,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599335476] [2021-11-13 17:52:34,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:52:34,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 17:52:34,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:52:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 17:52:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-13 17:52:34,383 INFO L87 Difference]: Start difference. First operand 285 states and 336 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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) [2021-11-13 17:52:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:52:35,742 INFO L93 Difference]: Finished difference Result 319 states and 374 transitions. [2021-11-13 17:52:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 17:52:35,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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 57 [2021-11-13 17:52:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:52:35,745 INFO L225 Difference]: With dead ends: 319 [2021-11-13 17:52:35,745 INFO L226 Difference]: Without dead ends: 319 [2021-11-13 17:52:35,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-11-13 17:52:35,746 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 238 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 784.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.01ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 921.58ms IncrementalHoareTripleChecker+Time [2021-11-13 17:52:35,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 574 Invalid, 1115 Unknown, 0 Unchecked, 6.01ms Time], IncrementalHoareTripleChecker [32 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 921.58ms Time] [2021-11-13 17:52:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-13 17:52:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 292. [2021-11-13 17:52:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 263 states have (on average 1.3003802281368821) internal successors, (342), 288 states have internal predecessors, (342), 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) [2021-11-13 17:52:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 345 transitions. [2021-11-13 17:52:35,756 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 345 transitions. Word has length 57 [2021-11-13 17:52:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:52:35,756 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 345 transitions. [2021-11-13 17:52:35,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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) [2021-11-13 17:52:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 345 transitions. [2021-11-13 17:52:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 17:52:35,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:52:35,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-11-13 17:52:35,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-13 17:52:35,758 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr55REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 67 more)] === [2021-11-13 17:52:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:52:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash 301327030, now seen corresponding path program 1 times [2021-11-13 17:52:35,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:52:35,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045470097] [2021-11-13 17:52:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:35,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:52:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:52:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:52:36,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:52:36,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045470097] [2021-11-13 17:52:36,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045470097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:52:36,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153600475] [2021-11-13 17:52:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:52:36,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:52:36,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:52:36,981 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:52:36,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5c0b812-09c6-4994-a44c-0d9f23d216e9/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 17:52:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:52:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-13 17:52:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:52:37,159 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 [2021-11-13 17:52:37,175 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 [2021-11-13 17:52:37,180 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 [2021-11-13 17:52:37,201 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:52:37,201 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 [2021-11-13 17:52:37,231 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-13 17:52:37,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:37,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:37,236 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 20 treesize of output 24 [2021-11-13 17:52:37,248 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 0 case distinctions, treesize of input 24 treesize of output 19 [2021-11-13 17:52:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:37,266 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 16 treesize of output 20 [2021-11-13 17:52:37,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-13 17:52:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:37,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-13 17:52:37,379 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 [2021-11-13 17:52:37,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:37,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-13 17:52:37,497 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:52:37,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2021-11-13 17:52:37,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:37,604 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-13 17:52:37,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 51 [2021-11-13 17:52:37,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:37,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-13 17:52:37,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:38,048 INFO L354 Elim1Store]: treesize reduction 194, result has 21.5 percent of original size [2021-11-13 17:52:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 127 treesize of output 115 [2021-11-13 17:52:38,083 INFO L354 Elim1Store]: treesize reduction 98, result has 27.4 percent of original size [2021-11-13 17:52:38,083 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 120 treesize of output 121 [2021-11-13 17:52:38,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:38,384 INFO L354 Elim1Store]: treesize reduction 118, result has 18.6 percent of original size [2021-11-13 17:52:38,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 132 treesize of output 129 [2021-11-13 17:52:38,402 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-13 17:52:38,403 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 145 treesize of output 147 [2021-11-13 17:52:38,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:38,790 INFO L354 Elim1Store]: treesize reduction 248, result has 16.8 percent of original size [2021-11-13 17:52:38,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 168 treesize of output 162 [2021-11-13 17:52:38,829 INFO L354 Elim1Store]: treesize reduction 150, result has 17.6 percent of original size [2021-11-13 17:52:38,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 184 [2021-11-13 17:52:49,218 INFO L354 Elim1Store]: treesize reduction 4, result has 94.5 percent of original size [2021-11-13 17:52:49,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 230 treesize of output 278 [2021-11-13 17:52:55,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:52:56,019 INFO L354 Elim1Store]: treesize reduction 872, result has 25.9 percent of original size [2021-11-13 17:52:56,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 2 disjoint index pairs (out of 66 index pairs), introduced 14 new quantified variables, introduced 75 case distinctions, treesize of input 414 treesize of output 510 [2021-11-13 17:52:56,743 INFO L354 Elim1Store]: treesize reduction 650, result has 28.1 percent of original size [2021-11-13 17:52:56,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 510 treesize of output 710