./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/dll-sorted-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-sorted-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b55b51cb0b3b4f908f36b1c6f95a18eadc174b8702aa08ef4d6f9775df6bb52 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:25:57,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:25:57,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:25:57,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:25:57,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:25:57,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:25:57,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:25:57,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:25:57,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:25:57,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:25:57,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:25:57,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:25:57,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:25:57,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:25:57,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:25:57,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:25:57,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:25:57,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:25:57,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:25:57,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:25:57,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:25:57,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:25:57,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:25:57,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:25:57,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:25:57,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:25:57,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:25:57,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:25:57,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:25:57,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:25:57,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:25:57,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:25:57,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:25:57,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:25:57,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:25:57,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:25:57,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:25:57,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:25:57,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:25:57,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:25:57,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:25:57,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-28 23:25:57,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:25:57,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:25:57,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:25:57,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:25:57,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:25:57,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:25:57,999 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:25:58,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:25:58,000 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:25:58,000 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:25:58,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:25:58,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:25:58,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:25:58,003 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:25:58,003 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:25:58,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:25:58,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:25:58,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:25:58,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:25:58,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:25:58,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:25:58,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:25:58,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:25:58,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:25:58,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:25:58,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:25:58,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:25:58,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:25:58,007 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b55b51cb0b3b4f908f36b1c6f95a18eadc174b8702aa08ef4d6f9775df6bb52 [2021-10-28 23:25:58,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:25:58,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:25:58,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:25:58,415 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:25:58,416 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:25:58,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/forester-heap/dll-sorted-1.i [2021-10-28 23:25:58,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/data/d5ea88def/a5a5574dede84003b69eca4a587b5f1f/FLAG03e3d0238 [2021-10-28 23:25:59,209 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:25:59,210 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i [2021-10-28 23:25:59,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/data/d5ea88def/a5a5574dede84003b69eca4a587b5f1f/FLAG03e3d0238 [2021-10-28 23:25:59,489 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/data/d5ea88def/a5a5574dede84003b69eca4a587b5f1f [2021-10-28 23:25:59,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:25:59,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:25:59,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:25:59,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:25:59,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:25:59,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:25:59" (1/1) ... [2021-10-28 23:25:59,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761cb2da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:59, skipping insertion in model container [2021-10-28 23:25:59,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:25:59" (1/1) ... [2021-10-28 23:25:59,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:25:59,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:25:59,996 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22384,22397] [2021-10-28 23:26:00,008 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22614,22627] [2021-10-28 23:26:00,018 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22989,23002] [2021-10-28 23:26:00,019 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23053,23066] [2021-10-28 23:26:00,024 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23184,23197] [2021-10-28 23:26:00,025 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23248,23261] [2021-10-28 23:26:00,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:26:00,055 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:26:00,129 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22384,22397] [2021-10-28 23:26:00,137 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22614,22627] [2021-10-28 23:26:00,143 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22989,23002] [2021-10-28 23:26:00,154 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23053,23066] [2021-10-28 23:26:00,155 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23184,23197] [2021-10-28 23:26:00,158 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_8408842b-a058-4f24-aec6-4b0215eb5ae9/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23248,23261] [2021-10-28 23:26:00,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:26:00,206 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:26:00,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00 WrapperNode [2021-10-28 23:26:00,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:26:00,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:26:00,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:26:00,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:26:00,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (1/1) ... [2021-10-28 23:26:00,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (1/1) ... [2021-10-28 23:26:00,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (1/1) ... [2021-10-28 23:26:00,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (1/1) ... [2021-10-28 23:26:00,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (1/1) ... [2021-10-28 23:26:00,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (1/1) ... [2021-10-28 23:26:00,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (1/1) ... [2021-10-28 23:26:00,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:26:00,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:26:00,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:26:00,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:26:00,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (1/1) ... [2021-10-28 23:26:00,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:26:00,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:00,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:26:00,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:26:00,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:26:00,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:26:00,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 23:26:00,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:26:00,482 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:26:00,482 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:26:00,482 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:26:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:26:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:26:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:26:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:26:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:26:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:26:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:26:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:26:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:26:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:26:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:26:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:26:00,486 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:26:00,486 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:26:00,486 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:26:00,487 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:26:00,487 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:26:00,487 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:26:00,487 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:26:00,488 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:26:00,488 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:26:00,488 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:26:00,488 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:26:00,489 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:26:00,489 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:26:00,489 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:26:00,490 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:26:00,490 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:26:00,490 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:26:00,490 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:26:00,491 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:26:00,491 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:26:00,492 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:26:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:26:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:26:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:26:00,494 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:26:00,494 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:26:00,494 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:26:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:26:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:26:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:26:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:26:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:26:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:26:00,498 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:26:00,499 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:26:00,499 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 23:26:00,500 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:26:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:26:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:26:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:26:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:26:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:26:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:26:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:26:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:26:00,504 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:26:00,505 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:26:00,505 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:26:00,505 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:26:00,505 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:26:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:26:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:26:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:26:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:26:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:26:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:26:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:26:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:26:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:26:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:26:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:26:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:26:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:26:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:26:00,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:26:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:26:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:26:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:26:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:26:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:26:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:26:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:26:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:26:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:26:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:26:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:26:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:26:00,511 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:26:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:26:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:26:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:26:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:26:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:26:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:26:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:26:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 23:26:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 23:26:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 23:26:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 23:26:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:26:00,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:26:00,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:26:00,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:26:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:26:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:26:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:26:00,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:26:00,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:26:00,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:26:00,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:26:01,473 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:26:01,473 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-28 23:26:01,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:26:01 BoogieIcfgContainer [2021-10-28 23:26:01,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:26:01,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:26:01,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:26:01,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:26:01,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:25:59" (1/3) ... [2021-10-28 23:26:01,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141890f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:26:01, skipping insertion in model container [2021-10-28 23:26:01,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:26:00" (2/3) ... [2021-10-28 23:26:01,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141890f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:26:01, skipping insertion in model container [2021-10-28 23:26:01,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:26:01" (3/3) ... [2021-10-28 23:26:01,492 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-sorted-1.i [2021-10-28 23:26:01,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:26:01,500 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2021-10-28 23:26:01,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:26:01,615 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:26:01,615 INFO L340 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2021-10-28 23:26:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 99 states have (on average 2.1717171717171717) internal successors, (215), 179 states have internal predecessors, (215), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:26:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 23:26:01,657 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:01,658 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:01,658 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1404346321, now seen corresponding path program 1 times [2021-10-28 23:26:01,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:01,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059178501] [2021-10-28 23:26:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:01,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:01,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:02,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:02,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059178501] [2021-10-28 23:26:02,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059178501] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:02,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:02,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:26:02,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360158718] [2021-10-28 23:26:02,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:26:02,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:26:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:26:02,086 INFO L87 Difference]: Start difference. First operand has 184 states, 99 states have (on average 2.1717171717171717) internal successors, (215), 179 states have internal predecessors, (215), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:02,601 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2021-10-28 23:26:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:26:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 23:26:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:02,617 INFO L225 Difference]: With dead ends: 186 [2021-10-28 23:26:02,617 INFO L226 Difference]: Without dead ends: 182 [2021-10-28 23:26:02,619 INFO L786 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 [2021-10-28 23:26:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-28 23:26:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2021-10-28 23:26:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 98 states have (on average 1.8979591836734695) internal successors, (186), 174 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 189 transitions. [2021-10-28 23:26:02,666 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 189 transitions. Word has length 7 [2021-10-28 23:26:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:02,666 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 189 transitions. [2021-10-28 23:26:02,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 189 transitions. [2021-10-28 23:26:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 23:26:02,667 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:02,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:02,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:26:02,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1404346320, now seen corresponding path program 1 times [2021-10-28 23:26:02,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:02,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797915948] [2021-10-28 23:26:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:02,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:02,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:02,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:02,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797915948] [2021-10-28 23:26:02,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797915948] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:02,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:02,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:26:02,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281922759] [2021-10-28 23:26:02,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:26:02,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:26:02,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:26:02,766 INFO L87 Difference]: Start difference. First operand 178 states and 189 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:03,207 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2021-10-28 23:26:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:26:03,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 23:26:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:03,211 INFO L225 Difference]: With dead ends: 179 [2021-10-28 23:26:03,211 INFO L226 Difference]: Without dead ends: 179 [2021-10-28 23:26:03,212 INFO L786 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 [2021-10-28 23:26:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-28 23:26:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2021-10-28 23:26:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 98 states have (on average 1.8673469387755102) internal successors, (183), 171 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 186 transitions. [2021-10-28 23:26:03,235 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 186 transitions. Word has length 7 [2021-10-28 23:26:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:03,236 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 186 transitions. [2021-10-28 23:26:03,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 186 transitions. [2021-10-28 23:26:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:26:03,237 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:03,238 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:03,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:26:03,238 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:03,239 INFO L85 PathProgramCache]: Analyzing trace with hash -155484519, now seen corresponding path program 1 times [2021-10-28 23:26:03,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:03,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821722576] [2021-10-28 23:26:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:03,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:03,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:03,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:03,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821722576] [2021-10-28 23:26:03,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821722576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:03,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:03,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:26:03,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395628942] [2021-10-28 23:26:03,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:26:03,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:26:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:26:03,406 INFO L87 Difference]: Start difference. First operand 175 states and 186 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:03,991 INFO L93 Difference]: Finished difference Result 289 states and 309 transitions. [2021-10-28 23:26:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:26:03,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 23:26:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:03,995 INFO L225 Difference]: With dead ends: 289 [2021-10-28 23:26:03,995 INFO L226 Difference]: Without dead ends: 289 [2021-10-28 23:26:03,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:26:03,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-28 23:26:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 234. [2021-10-28 23:26:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 157 states have (on average 1.8535031847133758) internal successors, (291), 230 states have internal predecessors, (291), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 294 transitions. [2021-10-28 23:26:04,045 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 294 transitions. Word has length 13 [2021-10-28 23:26:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:04,046 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 294 transitions. [2021-10-28 23:26:04,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 294 transitions. [2021-10-28 23:26:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:26:04,048 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:04,048 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:04,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:26:04,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash -155484520, now seen corresponding path program 1 times [2021-10-28 23:26:04,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:04,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003267198] [2021-10-28 23:26:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:04,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:04,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:04,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:04,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003267198] [2021-10-28 23:26:04,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003267198] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:04,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:04,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:26:04,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636024347] [2021-10-28 23:26:04,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:26:04,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:26:04,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:26:04,208 INFO L87 Difference]: Start difference. First operand 234 states and 294 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:04,605 INFO L93 Difference]: Finished difference Result 232 states and 272 transitions. [2021-10-28 23:26:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:26:04,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 23:26:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:04,610 INFO L225 Difference]: With dead ends: 232 [2021-10-28 23:26:04,610 INFO L226 Difference]: Without dead ends: 232 [2021-10-28 23:26:04,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:26:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-28 23:26:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2021-10-28 23:26:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 165 states have (on average 1.612121212121212) internal successors, (266), 220 states have internal predecessors, (266), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 269 transitions. [2021-10-28 23:26:04,646 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 269 transitions. Word has length 13 [2021-10-28 23:26:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:04,647 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 269 transitions. [2021-10-28 23:26:04,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 269 transitions. [2021-10-28 23:26:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:26:04,649 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:04,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:04,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:26:04,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:04,651 INFO L85 PathProgramCache]: Analyzing trace with hash 903211970, now seen corresponding path program 1 times [2021-10-28 23:26:04,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:04,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975961653] [2021-10-28 23:26:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:04,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:04,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:04,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975961653] [2021-10-28 23:26:04,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975961653] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:04,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:04,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:26:04,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774371966] [2021-10-28 23:26:04,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:26:04,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:26:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:26:04,770 INFO L87 Difference]: Start difference. First operand 224 states and 269 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:05,003 INFO L93 Difference]: Finished difference Result 270 states and 319 transitions. [2021-10-28 23:26:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:26:05,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 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 15 [2021-10-28 23:26:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:05,006 INFO L225 Difference]: With dead ends: 270 [2021-10-28 23:26:05,006 INFO L226 Difference]: Without dead ends: 270 [2021-10-28 23:26:05,006 INFO L786 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 [2021-10-28 23:26:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-10-28 23:26:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 237. [2021-10-28 23:26:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 178 states have (on average 1.6067415730337078) internal successors, (286), 233 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) [2021-10-28 23:26:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 289 transitions. [2021-10-28 23:26:05,016 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 289 transitions. Word has length 15 [2021-10-28 23:26:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:05,016 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 289 transitions. [2021-10-28 23:26:05,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 289 transitions. [2021-10-28 23:26:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:26:05,017 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:05,017 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:05,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:26:05,018 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2064587218, now seen corresponding path program 1 times [2021-10-28 23:26:05,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:05,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373877620] [2021-10-28 23:26:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:05,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:05,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:05,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:05,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373877620] [2021-10-28 23:26:05,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373877620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:05,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:05,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:26:05,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547549613] [2021-10-28 23:26:05,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:26:05,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:26:05,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:26:05,087 INFO L87 Difference]: Start difference. First operand 237 states and 289 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:05,462 INFO L93 Difference]: Finished difference Result 236 states and 286 transitions. [2021-10-28 23:26:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:26:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 23:26:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:05,466 INFO L225 Difference]: With dead ends: 236 [2021-10-28 23:26:05,466 INFO L226 Difference]: Without dead ends: 236 [2021-10-28 23:26:05,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:26:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-28 23:26:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-28 23:26:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 178 states have (on average 1.5898876404494382) internal successors, (283), 232 states have internal predecessors, (283), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 286 transitions. [2021-10-28 23:26:05,477 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 286 transitions. Word has length 16 [2021-10-28 23:26:05,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:05,477 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 286 transitions. [2021-10-28 23:26:05,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 286 transitions. [2021-10-28 23:26:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:26:05,479 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:05,479 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:05,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:26:05,480 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2064587217, now seen corresponding path program 1 times [2021-10-28 23:26:05,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:05,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281758644] [2021-10-28 23:26:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:05,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:05,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:05,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:05,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281758644] [2021-10-28 23:26:05,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281758644] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:05,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:05,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:26:05,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523145391] [2021-10-28 23:26:05,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:26:05,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:05,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:26:05,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:26:05,596 INFO L87 Difference]: Start difference. First operand 236 states and 286 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:05,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:05,990 INFO L93 Difference]: Finished difference Result 235 states and 283 transitions. [2021-10-28 23:26:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:26:05,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 23:26:05,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:05,992 INFO L225 Difference]: With dead ends: 235 [2021-10-28 23:26:05,993 INFO L226 Difference]: Without dead ends: 235 [2021-10-28 23:26:05,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:26:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-10-28 23:26:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-10-28 23:26:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 178 states have (on average 1.5730337078651686) internal successors, (280), 231 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) [2021-10-28 23:26:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2021-10-28 23:26:06,002 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 16 [2021-10-28 23:26:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:06,003 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2021-10-28 23:26:06,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2021-10-28 23:26:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:26:06,004 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:06,004 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:06,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:26:06,005 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash 949671408, now seen corresponding path program 1 times [2021-10-28 23:26:06,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:06,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107448535] [2021-10-28 23:26:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:06,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:06,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:06,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:06,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107448535] [2021-10-28 23:26:06,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107448535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:06,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:06,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:26:06,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004406131] [2021-10-28 23:26:06,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:26:06,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:06,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:26:06,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:26:06,200 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:06,919 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2021-10-28 23:26:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:26:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 23:26:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:06,922 INFO L225 Difference]: With dead ends: 242 [2021-10-28 23:26:06,922 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 23:26:06,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:26:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 23:26:06,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2021-10-28 23:26:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 178 states have (on average 1.5617977528089888) internal successors, (278), 230 states have internal predecessors, (278), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 281 transitions. [2021-10-28 23:26:06,931 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 281 transitions. Word has length 20 [2021-10-28 23:26:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:06,932 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 281 transitions. [2021-10-28 23:26:06,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 281 transitions. [2021-10-28 23:26:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:26:06,933 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:06,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:06,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:26:06,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash 949671409, now seen corresponding path program 1 times [2021-10-28 23:26:06,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:06,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846379004] [2021-10-28 23:26:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:06,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:07,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:07,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:07,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846379004] [2021-10-28 23:26:07,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846379004] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:07,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:07,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:26:07,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992577487] [2021-10-28 23:26:07,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:26:07,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:26:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:26:07,168 INFO L87 Difference]: Start difference. First operand 234 states and 281 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:08,070 INFO L93 Difference]: Finished difference Result 237 states and 275 transitions. [2021-10-28 23:26:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:26:08,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 23:26:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:08,073 INFO L225 Difference]: With dead ends: 237 [2021-10-28 23:26:08,073 INFO L226 Difference]: Without dead ends: 237 [2021-10-28 23:26:08,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:26:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-28 23:26:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 220. [2021-10-28 23:26:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 170 states have (on average 1.5294117647058822) internal successors, (260), 216 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 263 transitions. [2021-10-28 23:26:08,083 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 263 transitions. Word has length 20 [2021-10-28 23:26:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:08,083 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 263 transitions. [2021-10-28 23:26:08,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:08,084 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 263 transitions. [2021-10-28 23:26:08,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:26:08,085 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:08,086 INFO L513 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] [2021-10-28 23:26:08,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:26:08,086 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr20ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1432225935, now seen corresponding path program 1 times [2021-10-28 23:26:08,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:08,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262996022] [2021-10-28 23:26:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:08,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:08,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:26:08,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:08,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262996022] [2021-10-28 23:26:08,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262996022] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:08,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:08,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:26:08,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097165590] [2021-10-28 23:26:08,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:26:08,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:26:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:26:08,199 INFO L87 Difference]: Start difference. First operand 220 states and 263 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:08,545 INFO L93 Difference]: Finished difference Result 258 states and 281 transitions. [2021-10-28 23:26:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:26:08,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-28 23:26:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:08,548 INFO L225 Difference]: With dead ends: 258 [2021-10-28 23:26:08,548 INFO L226 Difference]: Without dead ends: 258 [2021-10-28 23:26:08,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:26:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-10-28 23:26:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 218. [2021-10-28 23:26:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 169 states have (on average 1.514792899408284) internal successors, (256), 214 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) [2021-10-28 23:26:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 259 transitions. [2021-10-28 23:26:08,560 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 259 transitions. Word has length 29 [2021-10-28 23:26:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:08,561 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 259 transitions. [2021-10-28 23:26:08,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 259 transitions. [2021-10-28 23:26:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:26:08,567 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:08,567 INFO L513 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] [2021-10-28 23:26:08,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:26:08,568 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:08,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1716077152, now seen corresponding path program 1 times [2021-10-28 23:26:08,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:08,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989482163] [2021-10-28 23:26:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:08,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:08,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:08,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:08,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989482163] [2021-10-28 23:26:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989482163] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:08,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217745304] [2021-10-28 23:26:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:08,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:08,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:08,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:09,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:26:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:26:09,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:09,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 23:26:09,590 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:26:09,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 23:26:09,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 23:26:09,943 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:26:09,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-28 23:26:10,291 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-10-28 23:26:10,291 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 48 [2021-10-28 23:26:10,491 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-28 23:26:10,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 45 [2021-10-28 23:26:10,936 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 23:26:10,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 33 [2021-10-28 23:26:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:10,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217745304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:10,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:26:10,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-28 23:26:10,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573213342] [2021-10-28 23:26:10,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:26:10,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:26:11,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:26:11,000 INFO L87 Difference]: Start difference. First operand 218 states and 259 transitions. Second operand has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:13,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:13,457 INFO L93 Difference]: Finished difference Result 423 states and 480 transitions. [2021-10-28 23:26:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 23:26:13,458 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-28 23:26:13,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:13,462 INFO L225 Difference]: With dead ends: 423 [2021-10-28 23:26:13,462 INFO L226 Difference]: Without dead ends: 423 [2021-10-28 23:26:13,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=376, Invalid=1786, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 23:26:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-10-28 23:26:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 243. [2021-10-28 23:26:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 194 states have (on average 1.4690721649484537) internal successors, (285), 239 states have internal predecessors, (285), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 288 transitions. [2021-10-28 23:26:13,475 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 288 transitions. Word has length 35 [2021-10-28 23:26:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:13,476 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 288 transitions. [2021-10-28 23:26:13,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 288 transitions. [2021-10-28 23:26:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 23:26:13,482 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:13,482 INFO L513 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] [2021-10-28 23:26:13,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-28 23:26:13,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 23:26:13,709 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr26REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:13,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1716077151, now seen corresponding path program 1 times [2021-10-28 23:26:13,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:13,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316975705] [2021-10-28 23:26:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:13,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:14,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:14,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:14,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316975705] [2021-10-28 23:26:14,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316975705] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:14,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506139088] [2021-10-28 23:26:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:14,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:14,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:14,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:14,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:26:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:26:14,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:14,756 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 23:26:14,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 23:26:14,792 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 23:26:14,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-10-28 23:26:15,088 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-10-28 23:26:15,091 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 90 [2021-10-28 23:26:15,134 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-28 23:26:15,135 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 87 treesize of output 66 [2021-10-28 23:26:16,121 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-10-28 23:26:16,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 81 [2021-10-28 23:26:16,143 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 23:26:16,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 47 [2021-10-28 23:26:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:16,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506139088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:16,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:26:16,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-28 23:26:16,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803580216] [2021-10-28 23:26:16,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:26:16,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:16,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:26:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:26:16,209 INFO L87 Difference]: Start difference. First operand 243 states and 288 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:20,292 INFO L93 Difference]: Finished difference Result 435 states and 488 transitions. [2021-10-28 23:26:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:26:20,293 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-28 23:26:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:20,296 INFO L225 Difference]: With dead ends: 435 [2021-10-28 23:26:20,296 INFO L226 Difference]: Without dead ends: 435 [2021-10-28 23:26:20,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 23:26:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-10-28 23:26:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 244. [2021-10-28 23:26:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 195 states have (on average 1.4615384615384615) internal successors, (285), 240 states have internal predecessors, (285), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 288 transitions. [2021-10-28 23:26:20,308 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 288 transitions. Word has length 35 [2021-10-28 23:26:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:20,309 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 288 transitions. [2021-10-28 23:26:20,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 288 transitions. [2021-10-28 23:26:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:26:20,310 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:20,311 INFO L513 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] [2021-10-28 23:26:20,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:20,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:26:20,528 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1587295850, now seen corresponding path program 1 times [2021-10-28 23:26:20,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:20,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418127296] [2021-10-28 23:26:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:20,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:20,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:20,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:20,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418127296] [2021-10-28 23:26:20,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418127296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:20,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871814681] [2021-10-28 23:26:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:20,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:20,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:20,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:26:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 23:26:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:21,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 23:26:21,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:26:21,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:26:21,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 23:26:21,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:26:21,671 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:26:21,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-28 23:26:21,710 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 23:26:21,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2021-10-28 23:26:21,855 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-28 23:26:21,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2021-10-28 23:26:21,995 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-28 23:26:21,995 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 [2021-10-28 23:26:24,241 INFO L354 Elim1Store]: treesize reduction 122, result has 19.7 percent of original size [2021-10-28 23:26:24,242 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 47 treesize of output 43 [2021-10-28 23:26:24,970 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 54 treesize of output 46 [2021-10-28 23:26:24,986 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 23:26:24,987 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 43 treesize of output 30 [2021-10-28 23:26:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:25,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871814681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:25,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:26:25,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-10-28 23:26:25,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288858398] [2021-10-28 23:26:25,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 23:26:25,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 23:26:25,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:26:25,080 INFO L87 Difference]: Start difference. First operand 244 states and 288 transitions. Second operand has 33 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:48,290 INFO L93 Difference]: Finished difference Result 460 states and 516 transitions. [2021-10-28 23:26:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 23:26:48,291 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-28 23:26:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:48,293 INFO L225 Difference]: With dead ends: 460 [2021-10-28 23:26:48,294 INFO L226 Difference]: Without dead ends: 460 [2021-10-28 23:26:48,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=613, Invalid=3415, Unknown=4, NotChecked=0, Total=4032 [2021-10-28 23:26:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-28 23:26:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 249. [2021-10-28 23:26:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 200 states have (on average 1.46) internal successors, (292), 245 states have internal predecessors, (292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 295 transitions. [2021-10-28 23:26:48,305 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 295 transitions. Word has length 40 [2021-10-28 23:26:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:48,306 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 295 transitions. [2021-10-28 23:26:48,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 295 transitions. [2021-10-28 23:26:48,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:26:48,308 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:48,308 INFO L513 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] [2021-10-28 23:26:48,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:48,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:26:48,533 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr21REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:48,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1587295851, now seen corresponding path program 1 times [2021-10-28 23:26:48,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:48,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497194913] [2021-10-28 23:26:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:48,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:48,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:26:48,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:48,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497194913] [2021-10-28 23:26:48,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497194913] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:48,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:48,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:26:48,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877028213] [2021-10-28 23:26:48,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:26:48,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:26:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:26:48,649 INFO L87 Difference]: Start difference. First operand 249 states and 295 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2021-10-28 23:26:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:49,165 INFO L93 Difference]: Finished difference Result 283 states and 335 transitions. [2021-10-28 23:26:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:26:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 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 40 [2021-10-28 23:26:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:49,168 INFO L225 Difference]: With dead ends: 283 [2021-10-28 23:26:49,168 INFO L226 Difference]: Without dead ends: 283 [2021-10-28 23:26:49,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:26:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-28 23:26:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 254. [2021-10-28 23:26:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 205 states have (on average 1.4634146341463414) internal successors, (300), 250 states have internal predecessors, (300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 303 transitions. [2021-10-28 23:26:49,175 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 303 transitions. Word has length 40 [2021-10-28 23:26:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:49,176 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 303 transitions. [2021-10-28 23:26:49,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2021-10-28 23:26:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 303 transitions. [2021-10-28 23:26:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:26:49,178 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:49,178 INFO L513 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] [2021-10-28 23:26:49,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 23:26:49,178 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash -371074441, now seen corresponding path program 1 times [2021-10-28 23:26:49,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:49,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638040347] [2021-10-28 23:26:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:49,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:49,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:26:49,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638040347] [2021-10-28 23:26:49,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638040347] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:49,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:49,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:26:49,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381708636] [2021-10-28 23:26:49,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:26:49,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:26:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:26:49,303 INFO L87 Difference]: Start difference. First operand 254 states and 303 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-10-28 23:26:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:49,675 INFO L93 Difference]: Finished difference Result 272 states and 322 transitions. [2021-10-28 23:26:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:26:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 40 [2021-10-28 23:26:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:49,678 INFO L225 Difference]: With dead ends: 272 [2021-10-28 23:26:49,678 INFO L226 Difference]: Without dead ends: 272 [2021-10-28 23:26:49,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:26:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-28 23:26:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 262. [2021-10-28 23:26:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 213 states have (on average 1.4507042253521127) internal successors, (309), 258 states have internal predecessors, (309), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 312 transitions. [2021-10-28 23:26:49,686 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 312 transitions. Word has length 40 [2021-10-28 23:26:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:49,686 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 312 transitions. [2021-10-28 23:26:49,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-10-28 23:26:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 312 transitions. [2021-10-28 23:26:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:26:49,687 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:49,687 INFO L513 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] [2021-10-28 23:26:49,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 23:26:49,688 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash -371014859, now seen corresponding path program 1 times [2021-10-28 23:26:49,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:49,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634634838] [2021-10-28 23:26:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:49,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:26:49,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:49,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634634838] [2021-10-28 23:26:49,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634634838] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:49,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:49,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:26:49,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487926420] [2021-10-28 23:26:49,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:26:49,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:26:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:26:49,790 INFO L87 Difference]: Start difference. First operand 262 states and 312 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 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) [2021-10-28 23:26:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:49,996 INFO L93 Difference]: Finished difference Result 259 states and 304 transitions. [2021-10-28 23:26:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:26:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 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 40 [2021-10-28 23:26:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:49,998 INFO L225 Difference]: With dead ends: 259 [2021-10-28 23:26:49,998 INFO L226 Difference]: Without dead ends: 259 [2021-10-28 23:26:49,999 INFO L786 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 [2021-10-28 23:26:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-28 23:26:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2021-10-28 23:26:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 213 states have (on average 1.4131455399061033) internal successors, (301), 254 states have internal predecessors, (301), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 304 transitions. [2021-10-28 23:26:50,006 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 304 transitions. Word has length 40 [2021-10-28 23:26:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:50,006 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 304 transitions. [2021-10-28 23:26:50,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 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) [2021-10-28 23:26:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 304 transitions. [2021-10-28 23:26:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:26:50,007 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:50,007 INFO L513 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] [2021-10-28 23:26:50,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 23:26:50,008 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash -371014858, now seen corresponding path program 1 times [2021-10-28 23:26:50,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:50,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203844674] [2021-10-28 23:26:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:50,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:50,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:26:50,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:50,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203844674] [2021-10-28 23:26:50,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203844674] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:50,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:50,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:26:50,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959162166] [2021-10-28 23:26:50,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:26:50,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:26:50,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:26:50,070 INFO L87 Difference]: Start difference. First operand 258 states and 304 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 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) [2021-10-28 23:26:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:50,313 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2021-10-28 23:26:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:26:50,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 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 40 [2021-10-28 23:26:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:50,315 INFO L225 Difference]: With dead ends: 254 [2021-10-28 23:26:50,315 INFO L226 Difference]: Without dead ends: 254 [2021-10-28 23:26:50,316 INFO L786 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 [2021-10-28 23:26:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-28 23:26:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-10-28 23:26:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 213 states have (on average 1.375586854460094) internal successors, (293), 250 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) [2021-10-28 23:26:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 296 transitions. [2021-10-28 23:26:50,324 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 296 transitions. Word has length 40 [2021-10-28 23:26:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:50,324 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 296 transitions. [2021-10-28 23:26:50,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 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) [2021-10-28 23:26:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 296 transitions. [2021-10-28 23:26:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 23:26:50,325 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:50,326 INFO L513 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] [2021-10-28 23:26:50,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 23:26:50,326 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1524461310, now seen corresponding path program 1 times [2021-10-28 23:26:50,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:50,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252351781] [2021-10-28 23:26:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:50,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:50,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:26:50,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:50,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252351781] [2021-10-28 23:26:50,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252351781] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:50,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:26:50,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:26:50,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726134158] [2021-10-28 23:26:50,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:26:50,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:26:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:26:50,421 INFO L87 Difference]: Start difference. First operand 254 states and 296 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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) [2021-10-28 23:26:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:50,836 INFO L93 Difference]: Finished difference Result 278 states and 320 transitions. [2021-10-28 23:26:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:26:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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 44 [2021-10-28 23:26:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:50,838 INFO L225 Difference]: With dead ends: 278 [2021-10-28 23:26:50,838 INFO L226 Difference]: Without dead ends: 278 [2021-10-28 23:26:50,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:26:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-28 23:26:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 261. [2021-10-28 23:26:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 220 states have (on average 1.3863636363636365) internal successors, (305), 257 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) [2021-10-28 23:26:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2021-10-28 23:26:50,845 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 44 [2021-10-28 23:26:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:50,846 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2021-10-28 23:26:50,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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) [2021-10-28 23:26:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2021-10-28 23:26:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 23:26:50,847 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:50,847 INFO L513 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] [2021-10-28 23:26:50,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 23:26:50,847 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1524461309, now seen corresponding path program 1 times [2021-10-28 23:26:50,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:50,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797796743] [2021-10-28 23:26:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:50,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:51,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:51,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:51,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797796743] [2021-10-28 23:26:51,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797796743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:51,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671695648] [2021-10-28 23:26:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:51,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:51,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:51,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:26:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:51,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:26:51,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-10-28 23:26:51,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-10-28 23:26:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:26:51,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671695648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:26:51,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:26:51,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 20 [2021-10-28 23:26:51,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281629728] [2021-10-28 23:26:51,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:26:51,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:51,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:26:51,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:26:51,884 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:52,239 INFO L93 Difference]: Finished difference Result 274 states and 315 transitions. [2021-10-28 23:26:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:26:52,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-10-28 23:26:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:52,241 INFO L225 Difference]: With dead ends: 274 [2021-10-28 23:26:52,241 INFO L226 Difference]: Without dead ends: 274 [2021-10-28 23:26:52,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:26:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-28 23:26:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 259. [2021-10-28 23:26:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 220 states have (on average 1.3636363636363635) internal successors, (300), 255 states have internal predecessors, (300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 303 transitions. [2021-10-28 23:26:52,249 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 303 transitions. Word has length 44 [2021-10-28 23:26:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:52,250 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 303 transitions. [2021-10-28 23:26:52,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 303 transitions. [2021-10-28 23:26:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 23:26:52,251 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:52,251 INFO L513 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] [2021-10-28 23:26:52,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:52,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:52,477 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1353350043, now seen corresponding path program 1 times [2021-10-28 23:26:52,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:52,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505662908] [2021-10-28 23:26:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:52,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:52,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:26:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:52,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:26:52,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505662908] [2021-10-28 23:26:52,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505662908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:52,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848927848] [2021-10-28 23:26:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:52,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:52,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:26:52,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:26:52,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:26:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:26:53,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 23:26:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:26:53,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 23:26:53,350 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 23:26:53,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 23:26:53,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 23:26:53,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 23:26:53,591 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 23:26:53,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-28 23:26:53,609 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 23:26:53,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2021-10-28 23:26:53,956 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-10-28 23:26:53,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 77 [2021-10-28 23:26:53,980 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-28 23:26:53,981 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 80 treesize of output 78 [2021-10-28 23:26:54,162 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 23:26:54,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 65 [2021-10-28 23:26:54,168 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 23:26:54,169 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 65 treesize of output 44 [2021-10-28 23:26:54,804 INFO L354 Elim1Store]: treesize reduction 70, result has 9.1 percent of original size [2021-10-28 23:26:54,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 54 [2021-10-28 23:26:54,824 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-10-28 23:26:54,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 32 [2021-10-28 23:26:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:26:54,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848927848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:26:54,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:26:54,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-10-28 23:26:54,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755130047] [2021-10-28 23:26:54,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:26:54,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:26:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:26:54,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:26:54,848 INFO L87 Difference]: Start difference. First operand 259 states and 303 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:26:58,967 INFO L93 Difference]: Finished difference Result 419 states and 473 transitions. [2021-10-28 23:26:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 23:26:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-10-28 23:26:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:26:58,970 INFO L225 Difference]: With dead ends: 419 [2021-10-28 23:26:58,970 INFO L226 Difference]: Without dead ends: 419 [2021-10-28 23:26:58,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=420, Invalid=2886, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 23:26:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-10-28 23:26:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 256. [2021-10-28 23:26:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 252 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) [2021-10-28 23:26:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 296 transitions. [2021-10-28 23:26:58,980 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 296 transitions. Word has length 44 [2021-10-28 23:26:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:26:58,981 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 296 transitions. [2021-10-28 23:26:58,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:26:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 296 transitions. [2021-10-28 23:26:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:26:58,982 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:26:58,982 INFO L513 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] [2021-10-28 23:26:59,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:26:59,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:26:59,197 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr35ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 75 more)] === [2021-10-28 23:26:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:26:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash -423467038, now seen corresponding path program 1 times [2021-10-28 23:26:59,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:26:59,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696289493] [2021-10-28 23:26:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:26:59,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:26:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:26:59,224 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:26:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:26:59,282 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:26:59,283 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:26:59,284 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr35ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:26:59,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:26:59,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:26:59,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 23:26:59,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 23:26:59,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 23:26:59,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 23:26:59,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 23:26:59,287 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 23:26:59,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 23:26:59,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 23:26:59,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 23:26:59,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 23:26:59,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 23:26:59,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 23:26:59,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 23:26:59,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 23:26:59,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 23:26:59,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 23:26:59,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 23:26:59,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 23:26:59,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:26:59,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 23:26:59,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 23:26:59,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 23:26:59,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 23:26:59,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 23:26:59,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-28 23:26:59,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 23:26:59,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 23:26:59,292 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 23:26:59,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-28 23:26:59,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-28 23:26:59,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-28 23:26:59,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-28 23:26:59,293 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-28 23:26:59,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-28 23:26:59,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-28 23:26:59,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-28 23:26:59,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-28 23:26:59,294 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-28 23:26:59,295 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-10-28 23:26:59,295 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-10-28 23:26:59,295 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-10-28 23:26:59,295 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44REQUIRES_VIOLATION [2021-10-28 23:26:59,295 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-10-28 23:26:59,296 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-10-28 23:26:59,296 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-10-28 23:26:59,296 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-10-28 23:26:59,296 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION [2021-10-28 23:26:59,296 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50REQUIRES_VIOLATION [2021-10-28 23:26:59,297 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION [2021-10-28 23:26:59,297 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-10-28 23:26:59,297 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-10-28 23:26:59,297 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION [2021-10-28 23:26:59,298 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55REQUIRES_VIOLATION [2021-10-28 23:26:59,298 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56REQUIRES_VIOLATION [2021-10-28 23:26:59,298 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57REQUIRES_VIOLATION [2021-10-28 23:26:59,298 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58REQUIRES_VIOLATION [2021-10-28 23:26:59,298 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59REQUIRES_VIOLATION [2021-10-28 23:26:59,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60REQUIRES_VIOLATION [2021-10-28 23:26:59,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr61REQUIRES_VIOLATION [2021-10-28 23:26:59,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr62ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:26:59,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr63ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:26:59,299 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr64REQUIRES_VIOLATION [2021-10-28 23:26:59,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr65REQUIRES_VIOLATION [2021-10-28 23:26:59,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr66REQUIRES_VIOLATION [2021-10-28 23:26:59,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr67REQUIRES_VIOLATION [2021-10-28 23:26:59,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr68REQUIRES_VIOLATION [2021-10-28 23:26:59,300 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr69REQUIRES_VIOLATION [2021-10-28 23:26:59,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr70ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:26:59,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr71ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:26:59,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr72REQUIRES_VIOLATION [2021-10-28 23:26:59,301 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr73REQUIRES_VIOLATION [2021-10-28 23:26:59,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr74REQUIRES_VIOLATION [2021-10-28 23:26:59,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr75REQUIRES_VIOLATION [2021-10-28 23:26:59,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr76ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:26:59,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr77ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:26:59,302 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr78ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:26:59,303 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr79ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:26:59,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 23:26:59,308 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:59,312 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:26:59,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:26:59 BoogieIcfgContainer [2021-10-28 23:26:59,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:26:59,385 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:26:59,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:26:59,386 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:26:59,386 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:26:01" (3/4) ... [2021-10-28 23:26:59,388 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:26:59,464 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:26:59,464 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:26:59,465 INFO L168 Benchmark]: Toolchain (without parser) took 59972.65 ms. Allocated memory was 123.7 MB in the beginning and 224.4 MB in the end (delta: 100.7 MB). Free memory was 84.9 MB in the beginning and 106.6 MB in the end (delta: -21.7 MB). Peak memory consumption was 77.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:59,466 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 123.7 MB. Free memory was 102.7 MB in the beginning and 102.6 MB in the end (delta: 55.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:26:59,466 INFO L168 Benchmark]: CACSL2BoogieTranslator took 709.49 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 89.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:59,467 INFO L168 Benchmark]: Boogie Preprocessor took 159.98 ms. Allocated memory is still 123.7 MB. Free memory was 89.0 MB in the beginning and 86.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:59,467 INFO L168 Benchmark]: RCFGBuilder took 1107.74 ms. Allocated memory is still 123.7 MB. Free memory was 86.0 MB in the beginning and 55.6 MB in the end (delta: 30.4 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:59,468 INFO L168 Benchmark]: TraceAbstraction took 57906.38 ms. Allocated memory was 123.7 MB in the beginning and 224.4 MB in the end (delta: 100.7 MB). Free memory was 55.2 MB in the beginning and 108.7 MB in the end (delta: -53.5 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:59,468 INFO L168 Benchmark]: Witness Printer took 78.92 ms. Allocated memory is still 224.4 MB. Free memory was 108.7 MB in the beginning and 106.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:59,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 123.7 MB. Free memory was 102.7 MB in the beginning and 102.6 MB in the end (delta: 55.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 709.49 ms. Allocated memory is still 123.7 MB. Free memory was 84.7 MB in the beginning and 89.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 159.98 ms. Allocated memory is still 123.7 MB. Free memory was 89.0 MB in the beginning and 86.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1107.74 ms. Allocated memory is still 123.7 MB. Free memory was 86.0 MB in the beginning and 55.6 MB in the end (delta: 30.4 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 57906.38 ms. Allocated memory was 123.7 MB in the beginning and 224.4 MB in the end (delta: 100.7 MB). Free memory was 55.2 MB in the beginning and 108.7 MB in the end (delta: -53.5 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. * Witness Printer took 78.92 ms. Allocated memory is still 224.4 MB. Free memory was 108.7 MB in the beginning and 106.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1038]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) VAL [head={-1:0}] [L999] head->prev = ((void*)0) VAL [head={-1:0}] [L1000] head->data = 0 VAL [head={-1:0}] [L1002] SLL* x = head; [L1003] int marked = 0; VAL [head={-1:0}, marked=0, x={-1:0}] [L1006] COND TRUE __VERIFIER_nondet_int() || !marked [L1009] x->next = malloc(sizeof(SLL)) VAL [head={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=0, x={-1:0}] [L1010] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1010] x->next->prev = x VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1011] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1011] x = x->next [L1012] x->next = ((void*)0) VAL [head={-1:0}, marked=0, x={-2:0}] [L1014] COND TRUE __VERIFIER_nondet_int() [L1016] marked = 1 VAL [head={-1:0}, marked=1, x={-2:0}] [L1019] COND TRUE \read(marked) VAL [head={-1:0}, marked=1, x={-2:0}] [L1020] x->data = 1 VAL [head={-1:0}, marked=1, x={-2:0}] [L1006] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1025] x = head VAL [head={-1:0}, marked=1, x={-1:0}] [L1027] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, marked=1, x={-1:0}] [L1028] marked = 0 VAL [head={-1:0}, marked=0, x={-1:0}] [L1030] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1030] x->next != ((void*)0) && x->next->data == 0 VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=1] [L1030] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=1] [L1030] EXPR x->next->data VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=1, x->next->data=1] [L1030] x->next != ((void*)0) && x->next->data == 0 VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=0, x->next->data=1] [L1030] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1035] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1035] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1035] x->next != ((void*)0) && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-3, head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next != ((void*)0) && __VERIFIER_nondet_int()=1] [L1035] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1037] EXPR x->next VAL [head={-1:0}, marked=0, x={-1:0}, x->next={-2:0}] [L1037] x = x->next [L1038] EXPR x->data VAL [head={-1:0}, marked=0, x={-2:0}, x->data=1] [L1038] COND TRUE !(x->data != 1) [L1038] reach_error() VAL [head={-1:0}, marked=0, x={-2:0}] - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1027]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1051]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1070]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1078]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1078]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1079]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1079]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1079]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 994]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 187 locations, 80 error locations. Started 1 CEGAR loops. OverallTime: 57.7s, OverallIterations: 21, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 41.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2304 SDtfs, 7038 SDslu, 7930 SDs, 0 SdLazy, 14445 SolverSat, 799 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 21.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 527 GetRequests, 189 SyntacticMatches, 8 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 21.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=15, InterpolantAutomatonStates: 238, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 986 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 12.7s InterpolantComputationTime, 802 NumberOfCodeBlocks, 802 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 731 ConstructedInterpolants, 43 QuantifiedInterpolants, 8977 SizeOfPredicates, 68 NumberOfNonLiveVariables, 1097 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 25 InterpolantComputations, 16 PerfectInterpolantSequences, 19/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:26:59,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8408842b-a058-4f24-aec6-4b0215eb5ae9/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...