./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/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_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/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-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:51:50,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:51:50,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:51:50,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:51:50,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:51:50,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:51:50,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:51:50,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:51:50,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:51:50,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:51:50,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:51:50,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:51:50,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:51:50,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:51:50,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:51:50,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:51:50,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:51:50,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:51:50,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:51:50,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:51:50,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:51:50,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:51:50,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:51:50,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:51:50,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:51:50,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:51:50,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:51:50,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:51:50,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:51:50,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:51:50,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:51:50,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:51:50,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:51:50,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:51:50,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:51:50,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:51:50,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:51:50,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:51:50,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:51:50,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:51:50,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:51:50,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:51:50,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:51:50,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:51:50,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:51:50,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:51:50,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:51:50,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:51:50,181 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:51:50,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:51:50,181 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:51:50,182 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:51:50,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:51:50,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:51:50,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:51:50,182 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:51:50,182 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:51:50,183 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:51:50,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:51:50,183 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:51:50,183 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:51:50,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:51:50,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:51:50,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:51:50,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:51:50,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:50,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:51:50,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:51:50,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:51:50,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:51:50,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:51:50,185 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_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2021-10-28 22:51:50,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:51:50,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:51:50,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:51:50,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:51:50,519 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:51:50,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2021-10-28 22:51:50,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/data/e9d81a3cb/fdd1a14687014b30b356826ac5bb5695/FLAG85dad0040 [2021-10-28 22:51:51,274 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:51:51,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2021-10-28 22:51:51,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/data/e9d81a3cb/fdd1a14687014b30b356826ac5bb5695/FLAG85dad0040 [2021-10-28 22:51:51,514 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/data/e9d81a3cb/fdd1a14687014b30b356826ac5bb5695 [2021-10-28 22:51:51,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:51:51,518 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:51:51,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:51,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:51:51,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:51:51,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:51" (1/1) ... [2021-10-28 22:51:51,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76aa0f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:51, skipping insertion in model container [2021-10-28 22:51:51,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:51" (1/1) ... [2021-10-28 22:51:51,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:51:51,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:51:51,942 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_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2021-10-28 22:51:51,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:51,954 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:51:52,003 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_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2021-10-28 22:51:52,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:52,042 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:51:52,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52 WrapperNode [2021-10-28 22:51:52,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:52,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:51:52,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:51:52,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:51:52,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (1/1) ... [2021-10-28 22:51:52,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (1/1) ... [2021-10-28 22:51:52,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (1/1) ... [2021-10-28 22:51:52,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (1/1) ... [2021-10-28 22:51:52,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (1/1) ... [2021-10-28 22:51:52,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (1/1) ... [2021-10-28 22:51:52,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (1/1) ... [2021-10-28 22:51:52,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:51:52,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:51:52,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:51:52,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:51:52,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (1/1) ... [2021-10-28 22:51:52,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:52,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:52,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:51:52,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:51:52,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:51:52,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:51:52,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:51:52,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:51:52,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:51:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 22:51:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-28 22:51:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-10-28 22:51:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_first [2021-10-28 22:51:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:51:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:51:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:51:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:51:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:51:52,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:51:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:51:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:51:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:51:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:51:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:51:52,211 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:51:52,212 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:51:52,212 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:51:52,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:51:52,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:51:52,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:51:52,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:51:52,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:51:52,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:51:52,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:51:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:51:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:51:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:51:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:51:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:51:52,214 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:51:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:51:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:51:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:51:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:51:52,215 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:51:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:51:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:51:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:51:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:51:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:51:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:51:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:51:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:51:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:51:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:51:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:51:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:51:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:51:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:51:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:51:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:51:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:51:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:51:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:51:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:51:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:51:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:51:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:51:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:51:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:51:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:51:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:51:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:51:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:51:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:51:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:51:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 22:51:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:51:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:51:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:51:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:51:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:51:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:51:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:51:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:51:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:51:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:51:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:51:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:51:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:51:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:51:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:51:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:51:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:51:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:51:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:51:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:51:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:51:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:51:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:51:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:51:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:51:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:51:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:51:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:51:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:51:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:51:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:51:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:51:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:51:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:51:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:51:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:51:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:51:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:51:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:51:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:51:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:51:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:51:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:51:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:51:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:51:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:51:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:51:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 22:51:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-28 22:51:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:51:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:51:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:51:52,238 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-10-28 22:51:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_first [2021-10-28 22:51:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:51:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:51:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:51:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 22:51:52,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:51:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:51:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:51:52,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:51:52,537 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 22:51:52,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:51:52,879 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 22:51:52,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:52 BoogieIcfgContainer [2021-10-28 22:51:52,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:51:52,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:51:52,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:51:52,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:51:52,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:51:51" (1/3) ... [2021-10-28 22:51:52,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9317780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:52, skipping insertion in model container [2021-10-28 22:51:52,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:52" (2/3) ... [2021-10-28 22:51:52,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9317780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:52, skipping insertion in model container [2021-10-28 22:51:52,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:52" (3/3) ... [2021-10-28 22:51:52,890 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2021-10-28 22:51:52,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:51:52,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2021-10-28 22:51:52,957 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:51:52,964 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 22:51:52,964 INFO L340 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2021-10-28 22:51:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 95 states have internal predecessors, (104), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 22:51:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:51:52,989 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:52,990 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:52,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1395759788, now seen corresponding path program 1 times [2021-10-28 22:51:53,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:53,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423308465] [2021-10-28 22:51:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:53,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:53,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:53,354 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 22:51:53,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:53,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423308465] [2021-10-28 22:51:53,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423308465] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:53,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:53,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:51:53,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284760099] [2021-10-28 22:51:53,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:51:53,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:51:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:53,385 INFO L87 Difference]: Start difference. First operand has 108 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 95 states have internal predecessors, (104), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:53,696 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2021-10-28 22:51:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:51:53,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 22:51:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:53,708 INFO L225 Difference]: With dead ends: 106 [2021-10-28 22:51:53,708 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 22:51:53,710 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 22:51:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 22:51:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-28 22:51:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 50 states have (on average 1.86) internal successors, (93), 89 states have internal predecessors, (93), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-10-28 22:51:53,762 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 12 [2021-10-28 22:51:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:53,762 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-10-28 22:51:53,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-10-28 22:51:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:51:53,763 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:53,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:53,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:51:53,764 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1395759787, now seen corresponding path program 1 times [2021-10-28 22:51:53,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:53,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674860798] [2021-10-28 22:51:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:53,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:53,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:53,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:53,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674860798] [2021-10-28 22:51:53,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674860798] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:53,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:53,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:51:53,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747933598] [2021-10-28 22:51:53,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:51:53,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:51:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:53,860 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:54,062 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-10-28 22:51:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:51:54,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 22:51:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:54,066 INFO L225 Difference]: With dead ends: 98 [2021-10-28 22:51:54,067 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 22:51:54,067 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 22:51:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 22:51:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-28 22:51:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 1.82) internal successors, (91), 87 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-10-28 22:51:54,080 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 12 [2021-10-28 22:51:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:54,080 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-10-28 22:51:54,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-10-28 22:51:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:51:54,081 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:54,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:54,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:51:54,082 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash -799936565, now seen corresponding path program 1 times [2021-10-28 22:51:54,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:54,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663557695] [2021-10-28 22:51:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:54,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:54,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:51:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:54,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:54,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663557695] [2021-10-28 22:51:54,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663557695] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:54,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:54,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:51:54,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021366388] [2021-10-28 22:51:54,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:51:54,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:51:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:51:54,206 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:51:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:54,637 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-10-28 22:51:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:51:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-10-28 22:51:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:54,641 INFO L225 Difference]: With dead ends: 105 [2021-10-28 22:51:54,641 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 22:51:54,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:51:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 22:51:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-10-28 22:51:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 51 states have (on average 1.803921568627451) internal successors, (92), 88 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-10-28 22:51:54,661 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 19 [2021-10-28 22:51:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:54,662 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-10-28 22:51:54,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:51:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-10-28 22:51:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:51:54,665 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:54,665 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:54,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:51:54,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1837051173, now seen corresponding path program 1 times [2021-10-28 22:51:54,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:54,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655764487] [2021-10-28 22:51:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:54,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:54,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:54,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:51:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:54,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 22:51:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:51:54,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:54,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655764487] [2021-10-28 22:51:54,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655764487] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:54,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:54,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:51:54,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461556432] [2021-10-28 22:51:54,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:51:54,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:51:54,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:51:54,880 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:55,252 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-10-28 22:51:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:51:55,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-28 22:51:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:55,255 INFO L225 Difference]: With dead ends: 99 [2021-10-28 22:51:55,255 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 22:51:55,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 22:51:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-10-28 22:51:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 87 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-10-28 22:51:55,264 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 28 [2021-10-28 22:51:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:55,264 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-10-28 22:51:55,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-10-28 22:51:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:51:55,265 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:55,266 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:55,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:51:55,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:55,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:55,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1837051174, now seen corresponding path program 1 times [2021-10-28 22:51:55,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:55,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157778238] [2021-10-28 22:51:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:55,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:55,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:55,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:51:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:55,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 22:51:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:51:55,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:55,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157778238] [2021-10-28 22:51:55,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157778238] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:55,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:55,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:51:55,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268615665] [2021-10-28 22:51:55,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:51:55,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:51:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:51:55,464 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:55,846 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-28 22:51:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:51:55,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-28 22:51:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:55,848 INFO L225 Difference]: With dead ends: 98 [2021-10-28 22:51:55,848 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 22:51:55,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 22:51:55,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-10-28 22:51:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-10-28 22:51:55,854 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 28 [2021-10-28 22:51:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:55,855 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-10-28 22:51:55,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:51:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-10-28 22:51:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 22:51:55,856 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:55,856 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:55,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 22:51:55,857 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258617, now seen corresponding path program 1 times [2021-10-28 22:51:55,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:55,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994104516] [2021-10-28 22:51:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:55,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:55,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:55,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:51:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:55,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 22:51:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:51:56,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:56,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994104516] [2021-10-28 22:51:56,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994104516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:56,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142232429] [2021-10-28 22:51:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:56,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:56,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:56,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:56,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:51:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 22:51:56,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:56,359 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 22:51:56,549 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:51:56,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 22:51:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:51:56,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142232429] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:56,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:51:56,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2021-10-28 22:51:56,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055291195] [2021-10-28 22:51:56,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:51:56,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:51:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:51:56,651 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 22:51:56,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:56,922 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-28 22:51:56,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:51:56,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-10-28 22:51:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:56,924 INFO L225 Difference]: With dead ends: 98 [2021-10-28 22:51:56,925 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 22:51:56,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:51:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 22:51:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-28 22:51:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 85 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-10-28 22:51:56,937 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 31 [2021-10-28 22:51:56,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:56,939 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-10-28 22:51:56,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 22:51:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-10-28 22:51:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 22:51:56,942 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:56,942 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:56,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:57,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:57,144 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258618, now seen corresponding path program 1 times [2021-10-28 22:51:57,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:57,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339386336] [2021-10-28 22:51:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:57,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:57,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:57,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:51:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:57,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 22:51:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:51:57,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:57,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339386336] [2021-10-28 22:51:57,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339386336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:57,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968974791] [2021-10-28 22:51:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:57,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:57,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:57,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:57,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:51:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 22:51:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:57,578 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 22:51:57,902 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-28 22:51:57,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2021-10-28 22:51:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:51:57,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968974791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:57,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:51:57,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-10-28 22:51:57,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982532113] [2021-10-28 22:51:57,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:51:57,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:51:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:51:57,982 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:51:58,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:58,560 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-28 22:51:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:51:58,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-10-28 22:51:58,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:58,562 INFO L225 Difference]: With dead ends: 96 [2021-10-28 22:51:58,562 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 22:51:58,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:51:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 22:51:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-10-28 22:51:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 84 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-10-28 22:51:58,569 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 31 [2021-10-28 22:51:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:58,569 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-10-28 22:51:58,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:51:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-10-28 22:51:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 22:51:58,571 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:58,571 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:58,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:58,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 22:51:58,788 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash 376686718, now seen corresponding path program 1 times [2021-10-28 22:51:58,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:58,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98836722] [2021-10-28 22:51:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:58,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:58,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:58,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:51:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:58,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:51:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:58,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:51:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:51:58,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:58,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98836722] [2021-10-28 22:51:58,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98836722] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:58,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:58,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:51:58,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446164047] [2021-10-28 22:51:58,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:51:58,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:58,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:51:58,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:51:58,945 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:51:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:59,151 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-28 22:51:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:51:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2021-10-28 22:51:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:59,154 INFO L225 Difference]: With dead ends: 98 [2021-10-28 22:51:59,154 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 22:51:59,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:51:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 22:51:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-28 22:51:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 85 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 22:51:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-10-28 22:51:59,168 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 37 [2021-10-28 22:51:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:59,169 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-10-28 22:51:59,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:51:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-10-28 22:51:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 22:51:59,175 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:59,175 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:59,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 22:51:59,176 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_remove_firstErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:51:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1218858003, now seen corresponding path program 1 times [2021-10-28 22:51:59,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:51:59,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766193878] [2021-10-28 22:51:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:59,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:51:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:59,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:51:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:59,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:51:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:59,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:51:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:59,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:51:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:51:59,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:59,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766193878] [2021-10-28 22:51:59,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766193878] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:59,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562414868] [2021-10-28 22:51:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:59,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:59,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:59,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:59,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:51:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:59,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 22:51:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:59,999 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 22:52:00,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 22:52:00,610 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 22:52:00,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 24 [2021-10-28 22:52:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:52:00,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562414868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:52:00,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:52:00,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-28 22:52:00,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986536096] [2021-10-28 22:52:00,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 22:52:00,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:52:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 22:52:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:52:00,774 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:53:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:26,485 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2021-10-28 22:53:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 22:53:26,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2021-10-28 22:53:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:26,488 INFO L225 Difference]: With dead ends: 147 [2021-10-28 22:53:26,488 INFO L226 Difference]: Without dead ends: 147 [2021-10-28 22:53:26,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=190, Invalid=998, Unknown=2, NotChecked=0, Total=1190 [2021-10-28 22:53:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-28 22:53:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2021-10-28 22:53:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 91 states have internal predecessors, (97), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-28 22:53:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-10-28 22:53:26,494 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 39 [2021-10-28 22:53:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:26,494 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-10-28 22:53:26,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:53:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-10-28 22:53:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 22:53:26,504 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:26,504 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:26,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:26,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:26,720 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_remove_firstErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1218858004, now seen corresponding path program 1 times [2021-10-28 22:53:26,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:26,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365515037] [2021-10-28 22:53:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:26,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:26,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:26,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:26,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:27,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 22:53:27,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:27,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365515037] [2021-10-28 22:53:27,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365515037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:27,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901456856] [2021-10-28 22:53:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:27,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:27,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:53:27,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:53:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:27,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 22:53:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:27,437 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 22:53:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 22:53:27,924 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 22:53:27,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-10-28 22:53:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 22:53:28,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901456856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:28,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:28,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-10-28 22:53:28,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701853786] [2021-10-28 22:53:28,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 22:53:28,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:28,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 22:53:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:53:28,105 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:53:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:29,264 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-10-28 22:53:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:53:29,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2021-10-28 22:53:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:29,267 INFO L225 Difference]: With dead ends: 158 [2021-10-28 22:53:29,267 INFO L226 Difference]: Without dead ends: 158 [2021-10-28 22:53:29,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-10-28 22:53:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-28 22:53:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 135. [2021-10-28 22:53:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 91 states have (on average 1.5934065934065933) internal successors, (145), 119 states have internal predecessors, (145), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-28 22:53:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2021-10-28 22:53:29,274 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 39 [2021-10-28 22:53:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:29,274 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2021-10-28 22:53:29,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:53:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2021-10-28 22:53:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 22:53:29,275 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:29,276 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:29,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:29,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 22:53:29,500 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash -870107508, now seen corresponding path program 1 times [2021-10-28 22:53:29,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:29,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32706468] [2021-10-28 22:53:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:29,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:29,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:29,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:29,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:29,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:53:29,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:29,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32706468] [2021-10-28 22:53:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32706468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:29,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:29,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 22:53:29,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862408969] [2021-10-28 22:53:29,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:53:29,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:53:29,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:53:29,725 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:30,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:30,501 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2021-10-28 22:53:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:53:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 22:53:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:30,504 INFO L225 Difference]: With dead ends: 186 [2021-10-28 22:53:30,504 INFO L226 Difference]: Without dead ends: 186 [2021-10-28 22:53:30,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:53:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-28 22:53:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2021-10-28 22:53:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.6105263157894736) internal successors, (153), 123 states have internal predecessors, (153), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 22:53:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions. [2021-10-28 22:53:30,516 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 40 [2021-10-28 22:53:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:30,517 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 173 transitions. [2021-10-28 22:53:30,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions. [2021-10-28 22:53:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 22:53:30,522 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:30,522 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:30,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 22:53:30,523 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_remove_firstErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:30,523 INFO L85 PathProgramCache]: Analyzing trace with hash -870107507, now seen corresponding path program 1 times [2021-10-28 22:53:30,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:30,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325580203] [2021-10-28 22:53:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:30,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:30,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:30,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:30,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:30,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:30,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325580203] [2021-10-28 22:53:30,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325580203] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:30,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:30,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 22:53:30,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8396825] [2021-10-28 22:53:30,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:53:30,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:30,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:53:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:53:30,823 INFO L87 Difference]: Start difference. First operand 140 states and 173 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:31,567 INFO L93 Difference]: Finished difference Result 189 states and 232 transitions. [2021-10-28 22:53:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:53:31,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 22:53:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:31,569 INFO L225 Difference]: With dead ends: 189 [2021-10-28 22:53:31,569 INFO L226 Difference]: Without dead ends: 189 [2021-10-28 22:53:31,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:53:31,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-28 22:53:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2021-10-28 22:53:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.5894736842105264) internal successors, (151), 123 states have internal predecessors, (151), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 22:53:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 171 transitions. [2021-10-28 22:53:31,577 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 171 transitions. Word has length 40 [2021-10-28 22:53:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:31,577 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 171 transitions. [2021-10-28 22:53:31,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 171 transitions. [2021-10-28 22:53:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 22:53:31,581 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:31,581 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:31,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 22:53:31,582 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1779866749, now seen corresponding path program 1 times [2021-10-28 22:53:31,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:31,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901563861] [2021-10-28 22:53:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:31,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:31,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:31,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:31,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:31,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:31,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901563861] [2021-10-28 22:53:31,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901563861] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:31,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:31,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 22:53:31,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522057605] [2021-10-28 22:53:31,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:53:31,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:53:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:53:31,797 INFO L87 Difference]: Start difference. First operand 140 states and 171 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:32,524 INFO L93 Difference]: Finished difference Result 217 states and 271 transitions. [2021-10-28 22:53:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 22:53:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-10-28 22:53:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:32,526 INFO L225 Difference]: With dead ends: 217 [2021-10-28 22:53:32,526 INFO L226 Difference]: Without dead ends: 217 [2021-10-28 22:53:32,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-28 22:53:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-28 22:53:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 176. [2021-10-28 22:53:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 125 states have (on average 1.608) internal successors, (201), 155 states have internal predecessors, (201), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (18), 10 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-28 22:53:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 231 transitions. [2021-10-28 22:53:32,536 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 231 transitions. Word has length 45 [2021-10-28 22:53:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:32,537 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 231 transitions. [2021-10-28 22:53:32,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 231 transitions. [2021-10-28 22:53:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 22:53:32,538 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:32,538 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:32,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 22:53:32,539 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash -658274541, now seen corresponding path program 1 times [2021-10-28 22:53:32,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:32,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006030619] [2021-10-28 22:53:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:32,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:32,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:32,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:32,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:32,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:53:32,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:32,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006030619] [2021-10-28 22:53:32,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006030619] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:32,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:32,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:53:32,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810596323] [2021-10-28 22:53:32,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:53:32,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:53:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:53:32,637 INFO L87 Difference]: Start difference. First operand 176 states and 231 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:32,999 INFO L93 Difference]: Finished difference Result 177 states and 231 transitions. [2021-10-28 22:53:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:53:33,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-10-28 22:53:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:33,005 INFO L225 Difference]: With dead ends: 177 [2021-10-28 22:53:33,006 INFO L226 Difference]: Without dead ends: 177 [2021-10-28 22:53:33,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:53:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-28 22:53:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-10-28 22:53:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 127 states have (on average 1.5826771653543308) internal successors, (201), 155 states have internal predecessors, (201), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (18), 10 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-28 22:53:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 231 transitions. [2021-10-28 22:53:33,015 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 231 transitions. Word has length 46 [2021-10-28 22:53:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:33,015 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 231 transitions. [2021-10-28 22:53:33,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 231 transitions. [2021-10-28 22:53:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 22:53:33,016 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:33,016 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:33,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 22:53:33,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash -658274540, now seen corresponding path program 1 times [2021-10-28 22:53:33,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:33,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253774958] [2021-10-28 22:53:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:33,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:33,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:33,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:33,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:33,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:33,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253774958] [2021-10-28 22:53:33,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253774958] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:33,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:33,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-28 22:53:33,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699289625] [2021-10-28 22:53:33,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 22:53:33,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 22:53:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:53:33,376 INFO L87 Difference]: Start difference. First operand 176 states and 231 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:34,291 INFO L93 Difference]: Finished difference Result 255 states and 325 transitions. [2021-10-28 22:53:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 22:53:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-10-28 22:53:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:34,293 INFO L225 Difference]: With dead ends: 255 [2021-10-28 22:53:34,293 INFO L226 Difference]: Without dead ends: 255 [2021-10-28 22:53:34,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-10-28 22:53:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-28 22:53:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 210. [2021-10-28 22:53:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 159 states have (on average 1.5723270440251573) internal successors, (250), 189 states have internal predecessors, (250), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 22:53:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 282 transitions. [2021-10-28 22:53:34,303 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 282 transitions. Word has length 46 [2021-10-28 22:53:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:34,304 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 282 transitions. [2021-10-28 22:53:34,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 282 transitions. [2021-10-28 22:53:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 22:53:34,305 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:34,305 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:34,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 22:53:34,305 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash -658705490, now seen corresponding path program 1 times [2021-10-28 22:53:34,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:34,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323725982] [2021-10-28 22:53:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:34,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:34,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:34,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:34,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:34,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:34,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:34,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323725982] [2021-10-28 22:53:34,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323725982] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:34,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:34,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 22:53:34,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535338430] [2021-10-28 22:53:34,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:53:34,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:53:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:53:34,504 INFO L87 Difference]: Start difference. First operand 210 states and 282 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:35,320 INFO L93 Difference]: Finished difference Result 245 states and 321 transitions. [2021-10-28 22:53:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 22:53:35,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-10-28 22:53:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:35,323 INFO L225 Difference]: With dead ends: 245 [2021-10-28 22:53:35,323 INFO L226 Difference]: Without dead ends: 245 [2021-10-28 22:53:35,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-28 22:53:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-10-28 22:53:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 216. [2021-10-28 22:53:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 165 states have (on average 1.5575757575757576) internal successors, (257), 195 states have internal predecessors, (257), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 22:53:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 289 transitions. [2021-10-28 22:53:35,334 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 289 transitions. Word has length 46 [2021-10-28 22:53:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:35,334 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 289 transitions. [2021-10-28 22:53:35,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 289 transitions. [2021-10-28 22:53:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 22:53:35,335 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:35,336 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:35,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 22:53:35,336 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1054966431, now seen corresponding path program 1 times [2021-10-28 22:53:35,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:35,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992204459] [2021-10-28 22:53:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:35,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:35,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:35,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:35,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:35,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:53:35,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:35,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992204459] [2021-10-28 22:53:35,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992204459] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:35,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:35,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:53:35,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134464769] [2021-10-28 22:53:35,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:53:35,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:53:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:53:35,433 INFO L87 Difference]: Start difference. First operand 216 states and 289 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:35,776 INFO L93 Difference]: Finished difference Result 215 states and 285 transitions. [2021-10-28 22:53:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:53:35,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-10-28 22:53:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:35,779 INFO L225 Difference]: With dead ends: 215 [2021-10-28 22:53:35,779 INFO L226 Difference]: Without dead ends: 215 [2021-10-28 22:53:35,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:53:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-28 22:53:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-10-28 22:53:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 165 states have (on average 1.5333333333333334) internal successors, (253), 194 states have internal predecessors, (253), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 22:53:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 285 transitions. [2021-10-28 22:53:35,787 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 285 transitions. Word has length 47 [2021-10-28 22:53:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:35,787 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 285 transitions. [2021-10-28 22:53:35,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 285 transitions. [2021-10-28 22:53:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 22:53:35,788 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:35,788 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:35,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 22:53:35,788 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_remove_firstErr11REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:35,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1655778863, now seen corresponding path program 1 times [2021-10-28 22:53:35,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:35,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4368531] [2021-10-28 22:53:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:35,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:35,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:36,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:36,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4368531] [2021-10-28 22:53:36,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4368531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:36,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:36,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-28 22:53:36,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843439587] [2021-10-28 22:53:36,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 22:53:36,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 22:53:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:53:36,056 INFO L87 Difference]: Start difference. First operand 215 states and 285 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:53:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:36,849 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2021-10-28 22:53:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 22:53:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-10-28 22:53:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:36,857 INFO L225 Difference]: With dead ends: 242 [2021-10-28 22:53:36,857 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 22:53:36,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-10-28 22:53:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 22:53:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 219. [2021-10-28 22:53:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 169 states have (on average 1.5266272189349113) internal successors, (258), 198 states have internal predecessors, (258), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 22:53:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 290 transitions. [2021-10-28 22:53:36,867 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 290 transitions. Word has length 48 [2021-10-28 22:53:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:36,868 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 290 transitions. [2021-10-28 22:53:36,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:53:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 290 transitions. [2021-10-28 22:53:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 22:53:36,869 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:36,869 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:36,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 22:53:36,872 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_circular_remove_firstErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1103929599, now seen corresponding path program 2 times [2021-10-28 22:53:36,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:36,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426063243] [2021-10-28 22:53:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:36,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 22:53:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 22:53:36,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:36,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426063243] [2021-10-28 22:53:36,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426063243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:36,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772886310] [2021-10-28 22:53:36,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:53:36,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:36,996 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:53:37,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:53:37,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:53:37,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:53:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:53:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 22:53:37,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772886310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:37,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:37,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-28 22:53:37,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865074848] [2021-10-28 22:53:37,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:53:37,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:53:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:53:37,454 INFO L87 Difference]: Start difference. First operand 219 states and 290 transitions. Second operand has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:53:37,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:37,696 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2021-10-28 22:53:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:53:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 51 [2021-10-28 22:53:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:37,705 INFO L225 Difference]: With dead ends: 133 [2021-10-28 22:53:37,705 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 22:53:37,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:53:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 22:53:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-28 22:53:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 1.358695652173913) internal successors, (125), 110 states have internal predecessors, (125), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 22:53:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2021-10-28 22:53:37,711 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 51 [2021-10-28 22:53:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:37,712 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2021-10-28 22:53:37,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:53:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2021-10-28 22:53:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 22:53:37,713 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:37,713 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:37,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:37,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:37,932 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1386580709, now seen corresponding path program 1 times [2021-10-28 22:53:37,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:37,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594823523] [2021-10-28 22:53:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:37,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:38,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:38,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:53:38,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:38,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594823523] [2021-10-28 22:53:38,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594823523] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:38,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:38,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 22:53:38,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984129350] [2021-10-28 22:53:38,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:53:38,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:38,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:53:38,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:53:38,218 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:38,872 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-10-28 22:53:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:53:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-10-28 22:53:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:38,873 INFO L225 Difference]: With dead ends: 122 [2021-10-28 22:53:38,873 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 22:53:38,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:53:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 22:53:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2021-10-28 22:53:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 104 states have internal predecessors, (115), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-28 22:53:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2021-10-28 22:53:38,879 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 51 [2021-10-28 22:53:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:38,879 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2021-10-28 22:53:38,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:53:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2021-10-28 22:53:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 22:53:38,880 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:38,881 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:38,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 22:53:38,881 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1386528094, now seen corresponding path program 1 times [2021-10-28 22:53:38,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:38,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927058185] [2021-10-28 22:53:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:38,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:39,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:39,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:39,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:39,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:39,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:39,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927058185] [2021-10-28 22:53:39,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927058185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:39,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298716602] [2021-10-28 22:53:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:39,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:39,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:39,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:53:39,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:53:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:39,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-28 22:53:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:39,720 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 22:53:39,934 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:53:39,935 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 22:53:40,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:53:40,126 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:53:40,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-28 22:53:40,766 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 70 treesize of output 62 [2021-10-28 22:53:41,046 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-28 22:53:41,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 26 [2021-10-28 22:53:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:53:41,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298716602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:41,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:41,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 40 [2021-10-28 22:53:41,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726718208] [2021-10-28 22:53:41,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 22:53:41,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 22:53:41,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 22:53:41,058 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 22:53:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:43,004 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2021-10-28 22:53:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 22:53:43,005 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2021-10-28 22:53:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:43,006 INFO L225 Difference]: With dead ends: 131 [2021-10-28 22:53:43,006 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 22:53:43,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=282, Invalid=3140, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 22:53:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 22:53:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 120. [2021-10-28 22:53:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 106 states have internal predecessors, (118), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-28 22:53:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2021-10-28 22:53:43,013 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 51 [2021-10-28 22:53:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:43,013 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2021-10-28 22:53:43,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 22:53:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2021-10-28 22:53:43,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 22:53:43,014 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:43,015 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:43,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:43,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:43,229 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1386528093, now seen corresponding path program 1 times [2021-10-28 22:53:43,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:43,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160608046] [2021-10-28 22:53:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:43,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:43,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:43,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:43,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:44,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:44,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160608046] [2021-10-28 22:53:44,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160608046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:44,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206034095] [2021-10-28 22:53:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:44,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:44,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:44,138 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:53:44,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:53:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-28 22:53:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:44,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:53:44,512 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 22:53:44,944 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:53:44,945 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 22:53:44,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 22:53:45,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:53:45,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:53:45,338 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 22:53:45,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-28 22:53:45,349 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:53:45,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 22:53:46,608 INFO L354 Elim1Store]: treesize reduction 61, result has 11.6 percent of original size [2021-10-28 22:53:46,609 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 121 treesize of output 66 [2021-10-28 22:53:46,624 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-28 22:53:46,625 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 51 treesize of output 37 [2021-10-28 22:53:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:53:46,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206034095] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:46,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:46,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 48 [2021-10-28 22:53:46,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007356358] [2021-10-28 22:53:46,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 22:53:46,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 22:53:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 22:53:46,797 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 49 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 39 states have internal predecessors, (78), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 22:53:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:49,493 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-10-28 22:53:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 22:53:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 39 states have internal predecessors, (78), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2021-10-28 22:53:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:49,495 INFO L225 Difference]: With dead ends: 146 [2021-10-28 22:53:49,495 INFO L226 Difference]: Without dead ends: 146 [2021-10-28 22:53:49,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=364, Invalid=4058, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 22:53:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-28 22:53:49,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2021-10-28 22:53:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 99 states have (on average 1.3333333333333333) internal successors, (132), 117 states have internal predecessors, (132), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 22:53:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2021-10-28 22:53:49,502 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 51 [2021-10-28 22:53:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:49,502 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2021-10-28 22:53:49,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 39 states have internal predecessors, (78), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 22:53:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2021-10-28 22:53:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 22:53:49,504 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:49,504 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:49,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:49,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:49,724 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:49,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:49,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1807125059, now seen corresponding path program 1 times [2021-10-28 22:53:49,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:49,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335189529] [2021-10-28 22:53:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:49,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:49,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:49,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:49,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:49,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:53:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:53:49,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:49,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335189529] [2021-10-28 22:53:49,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335189529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:53:49,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:53:49,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:53:49,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180258067] [2021-10-28 22:53:49,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:53:49,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:49,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:53:49,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:53:49,851 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-28 22:53:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:50,117 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2021-10-28 22:53:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:53:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2021-10-28 22:53:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:50,120 INFO L225 Difference]: With dead ends: 129 [2021-10-28 22:53:50,120 INFO L226 Difference]: Without dead ends: 129 [2021-10-28 22:53:50,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:53:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-28 22:53:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-28 22:53:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 99 states have (on average 1.303030303030303) internal successors, (129), 115 states have internal predecessors, (129), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 22:53:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2021-10-28 22:53:50,125 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 53 [2021-10-28 22:53:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:50,125 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2021-10-28 22:53:50,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-28 22:53:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2021-10-28 22:53:50,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 22:53:50,126 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:50,127 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:50,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 22:53:50,127 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1480393345, now seen corresponding path program 1 times [2021-10-28 22:53:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:50,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858017566] [2021-10-28 22:53:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:50,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:50,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:50,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:50,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:50,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:53:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:53:50,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:50,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858017566] [2021-10-28 22:53:50,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858017566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:50,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444749619] [2021-10-28 22:53:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:50,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:50,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:50,256 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:53:50,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:53:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 22:53:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:53:50,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444749619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:50,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:50,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-28 22:53:50,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710867318] [2021-10-28 22:53:50,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:53:50,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:53:50,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:53:50,882 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 22:53:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:51,059 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2021-10-28 22:53:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:53:51,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2021-10-28 22:53:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:51,060 INFO L225 Difference]: With dead ends: 133 [2021-10-28 22:53:51,060 INFO L226 Difference]: Without dead ends: 133 [2021-10-28 22:53:51,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:53:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-28 22:53:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-28 22:53:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 117 states have internal predecessors, (133), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 22:53:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-10-28 22:53:51,065 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 55 [2021-10-28 22:53:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:51,066 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-10-28 22:53:51,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 22:53:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-10-28 22:53:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 22:53:51,067 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:51,067 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:51,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:51,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:51,280 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1357843693, now seen corresponding path program 1 times [2021-10-28 22:53:51,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:51,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818454491] [2021-10-28 22:53:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:51,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:51,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:51,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:51,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:51,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:51,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:53:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:52,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:52,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818454491] [2021-10-28 22:53:52,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818454491] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:52,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562431389] [2021-10-28 22:53:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:52,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:52,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:52,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:53:52,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:53:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:52,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-28 22:53:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:52,584 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 22:53:52,887 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:53:52,887 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 22:53:52,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 22:53:53,134 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:53:53,134 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 34 treesize of output 28 [2021-10-28 22:53:53,798 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 27 treesize of output 19 [2021-10-28 22:53:53,872 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-10-28 22:53:53,873 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 57 treesize of output 1 [2021-10-28 22:53:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:53:53,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562431389] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:53,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:53,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 49 [2021-10-28 22:53:53,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693451435] [2021-10-28 22:53:53,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 22:53:53,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 22:53:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2208, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 22:53:53,889 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 49 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 38 states have internal predecessors, (76), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 22:53:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:55,592 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-10-28 22:53:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 22:53:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 38 states have internal predecessors, (76), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 56 [2021-10-28 22:53:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:55,594 INFO L225 Difference]: With dead ends: 117 [2021-10-28 22:53:55,594 INFO L226 Difference]: Without dead ends: 110 [2021-10-28 22:53:55,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=345, Invalid=4211, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 22:53:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-28 22:53:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-28 22:53:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 97 states have internal predecessors, (105), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:53:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-10-28 22:53:55,599 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 56 [2021-10-28 22:53:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:55,600 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-10-28 22:53:55,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 38 states have internal predecessors, (76), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 22:53:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-10-28 22:53:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 22:53:55,601 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:55,601 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:55,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:55,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:55,812 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:53:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash 761567980, now seen corresponding path program 1 times [2021-10-28 22:53:55,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:55,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404901746] [2021-10-28 22:53:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:55,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:56,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:56,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:56,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:56,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:53:56,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:56,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404901746] [2021-10-28 22:53:56,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404901746] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:56,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530862078] [2021-10-28 22:53:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:56,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:56,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:56,534 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:53:56,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:53:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:56,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-28 22:53:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:57,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:53:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 22:53:57,365 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:53:57,366 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 22:53:57,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:53:57,598 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:53:57,598 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 35 treesize of output 25 [2021-10-28 22:53:58,605 INFO L354 Elim1Store]: treesize reduction 52, result has 13.3 percent of original size [2021-10-28 22:53:58,605 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 64 treesize of output 29 [2021-10-28 22:53:58,805 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:53:58,806 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 24 treesize of output 23 [2021-10-28 22:53:58,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 22:53:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:53:58,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530862078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:58,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:58,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 50 [2021-10-28 22:53:58,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533269255] [2021-10-28 22:53:58,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 22:53:58,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 22:53:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 22:53:58,866 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:54:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:01,492 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-28 22:54:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 22:54:01,493 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 56 [2021-10-28 22:54:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:01,494 INFO L225 Difference]: With dead ends: 124 [2021-10-28 22:54:01,495 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 22:54:01,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=352, Invalid=5198, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 22:54:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 22:54:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-10-28 22:54:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 97 states have internal predecessors, (104), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:54:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2021-10-28 22:54:01,501 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 56 [2021-10-28 22:54:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:01,502 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2021-10-28 22:54:01,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:54:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2021-10-28 22:54:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 22:54:01,503 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:01,503 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:01,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:01,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 22:54:01,720 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:54:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 761620595, now seen corresponding path program 2 times [2021-10-28 22:54:01,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:01,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367008206] [2021-10-28 22:54:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:01,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:02,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:02,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:02,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:54:02,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:02,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367008206] [2021-10-28 22:54:02,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367008206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:02,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740132036] [2021-10-28 22:54:02,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:54:02,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:02,553 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:02,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:54:03,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:54:03,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:54:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-28 22:54:03,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:03,097 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 22:54:03,434 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 22:54:03,435 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 22:54:03,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:54:03,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:54:03,786 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 22:54:03,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-28 22:54:03,795 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:54:03,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 22:54:04,842 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-10-28 22:54:04,843 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 121 treesize of output 87 [2021-10-28 22:54:05,118 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-28 22:54:05,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 31 [2021-10-28 22:54:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:05,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740132036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:05,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:54:05,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 51 [2021-10-28 22:54:05,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731011848] [2021-10-28 22:54:05,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 22:54:05,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 22:54:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 22:54:05,236 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand has 52 states, 50 states have (on average 1.72) internal successors, (86), 42 states have internal predecessors, (86), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 22:54:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:08,363 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-10-28 22:54:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 22:54:08,363 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.72) internal successors, (86), 42 states have internal predecessors, (86), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-10-28 22:54:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:08,364 INFO L225 Difference]: With dead ends: 130 [2021-10-28 22:54:08,365 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 22:54:08,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=434, Invalid=4678, Unknown=0, NotChecked=0, Total=5112 [2021-10-28 22:54:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 22:54:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 112. [2021-10-28 22:54:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 99 states have internal predecessors, (107), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:54:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-10-28 22:54:08,370 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 56 [2021-10-28 22:54:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:08,371 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-10-28 22:54:08,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.72) internal successors, (86), 42 states have internal predecessors, (86), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 22:54:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-10-28 22:54:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 22:54:08,372 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:08,372 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:08,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:08,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 22:54:08,588 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:54:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash 761620596, now seen corresponding path program 2 times [2021-10-28 22:54:08,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:08,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965724371] [2021-10-28 22:54:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:08,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:09,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:09,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:09,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:54:09,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:09,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965724371] [2021-10-28 22:54:09,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965724371] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:09,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548171688] [2021-10-28 22:54:09,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:54:09,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:09,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:09,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:09,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:54:10,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:54:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:54:10,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 103 conjunts are in the unsatisfiable core [2021-10-28 22:54:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:10,213 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 22:54:10,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:54:10,504 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 22:54:10,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:54:10,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:54:10,734 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 22:54:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-10-28 22:54:10,741 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:54:10,742 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 46 treesize of output 41 [2021-10-28 22:54:11,843 INFO L354 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2021-10-28 22:54:11,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 87 [2021-10-28 22:54:11,869 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-28 22:54:11,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 39 [2021-10-28 22:54:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:11,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548171688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:11,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:54:11,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26] total 49 [2021-10-28 22:54:11,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222995569] [2021-10-28 22:54:11,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 22:54:11,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:11,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 22:54:11,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 22:54:11,941 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 49 states, 48 states have (on average 1.625) internal successors, (78), 39 states have internal predecessors, (78), 5 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 22:54:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:14,344 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-10-28 22:54:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 22:54:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.625) internal successors, (78), 39 states have internal predecessors, (78), 5 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-10-28 22:54:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:14,346 INFO L225 Difference]: With dead ends: 109 [2021-10-28 22:54:14,346 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 22:54:14,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=356, Invalid=4066, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 22:54:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 22:54:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-10-28 22:54:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.2625) internal successors, (101), 94 states have internal predecessors, (101), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 22:54:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-10-28 22:54:14,351 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 56 [2021-10-28 22:54:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-10-28 22:54:14,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.625) internal successors, (78), 39 states have internal predecessors, (78), 5 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 22:54:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-10-28 22:54:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 22:54:14,353 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:14,353 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:14,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:14,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 22:54:14,577 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:54:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2133771082, now seen corresponding path program 1 times [2021-10-28 22:54:14,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:14,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931773277] [2021-10-28 22:54:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:14,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:14,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:14,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:15,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:15,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:54:15,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:15,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931773277] [2021-10-28 22:54:15,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931773277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:15,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278055473] [2021-10-28 22:54:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:15,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:15,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:15,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:15,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:54:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-28 22:54:15,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:15,943 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 22:54:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 22:54:16,321 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:54:16,321 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 22:54:16,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:54:16,592 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:54:16,593 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 35 treesize of output 25 [2021-10-28 22:54:17,318 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 22:54:17,929 INFO L354 Elim1Store]: treesize reduction 156, result has 15.7 percent of original size [2021-10-28 22:54:17,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 81 treesize of output 61 [2021-10-28 22:54:18,014 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 22:54:18,015 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 45 treesize of output 20 [2021-10-28 22:54:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:18,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278055473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:18,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:54:18,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 51 [2021-10-28 22:54:18,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489448971] [2021-10-28 22:54:18,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 22:54:18,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:18,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 22:54:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2516, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 22:54:18,035 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 52 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 42 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:54:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:21,336 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-10-28 22:54:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 22:54:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 42 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2021-10-28 22:54:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:21,337 INFO L225 Difference]: With dead ends: 109 [2021-10-28 22:54:21,337 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 22:54:21,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=359, Invalid=5191, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 22:54:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 22:54:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-10-28 22:54:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.25) internal successors, (100), 94 states have internal predecessors, (100), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 22:54:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-28 22:54:21,343 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 57 [2021-10-28 22:54:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:21,343 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-28 22:54:21,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 42 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:54:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-28 22:54:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 22:54:21,344 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:21,345 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:21,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:21,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 22:54:21,560 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:54:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1722394286, now seen corresponding path program 1 times [2021-10-28 22:54:21,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:21,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748521473] [2021-10-28 22:54:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:21,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:21,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:21,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:22,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:22,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:54:22,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:22,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748521473] [2021-10-28 22:54:22,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748521473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:22,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642889502] [2021-10-28 22:54:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:22,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:22,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:22,228 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:22,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 22:54:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-28 22:54:22,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:22,993 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 22:54:23,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 22:54:23,356 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:54:23,357 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 22:54:23,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:54:23,628 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:54:23,629 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 35 treesize of output 25 [2021-10-28 22:54:24,475 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 22:54:25,166 INFO L354 Elim1Store]: treesize reduction 215, result has 13.0 percent of original size [2021-10-28 22:54:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 68 [2021-10-28 22:54:25,245 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:54:25,245 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 46 treesize of output 25 [2021-10-28 22:54:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:25,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642889502] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:25,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:54:25,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 53 [2021-10-28 22:54:25,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717332589] [2021-10-28 22:54:25,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-28 22:54:25,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-28 22:54:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2723, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 22:54:25,256 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 54 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 44 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:54:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:28,648 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-10-28 22:54:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 22:54:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 44 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2021-10-28 22:54:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:28,650 INFO L225 Difference]: With dead ends: 107 [2021-10-28 22:54:28,650 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 22:54:28,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=362, Invalid=5490, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 22:54:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 22:54:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-28 22:54:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.2375) internal successors, (99), 94 states have internal predecessors, (99), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 22:54:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-28 22:54:28,654 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 58 [2021-10-28 22:54:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-28 22:54:28,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 44 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 22:54:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-28 22:54:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 22:54:28,655 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:28,656 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:28,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:28,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:28,872 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_circular_remove_firstErr28REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:54:28,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:28,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1854615501, now seen corresponding path program 1 times [2021-10-28 22:54:28,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:28,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601816582] [2021-10-28 22:54:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:28,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:28,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:28,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:29,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:29,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 22:54:29,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:29,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601816582] [2021-10-28 22:54:29,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601816582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:29,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:54:29,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 22:54:29,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162212860] [2021-10-28 22:54:29,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:54:29,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:54:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:54:29,032 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:54:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:29,353 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-10-28 22:54:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:54:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2021-10-28 22:54:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:29,354 INFO L225 Difference]: With dead ends: 106 [2021-10-28 22:54:29,354 INFO L226 Difference]: Without dead ends: 106 [2021-10-28 22:54:29,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:54:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-28 22:54:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-28 22:54:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.2125) internal successors, (97), 93 states have internal predecessors, (97), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 22:54:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-10-28 22:54:29,358 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 59 [2021-10-28 22:54:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:29,359 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-10-28 22:54:29,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:54:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-10-28 22:54:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 22:54:29,360 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:29,360 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:29,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 22:54:29,360 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:54:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash -170152215, now seen corresponding path program 1 times [2021-10-28 22:54:29,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:29,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710889509] [2021-10-28 22:54:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:29,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:29,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:29,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:29,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:29,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:54:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:54:30,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:30,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710889509] [2021-10-28 22:54:30,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710889509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:30,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903556387] [2021-10-28 22:54:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:30,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:30,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:30,900 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:30,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 22:54:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 108 conjunts are in the unsatisfiable core [2021-10-28 22:54:31,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:31,724 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 22:54:32,047 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:54:32,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:54:32,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:54:32,288 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 22:54:32,288 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 28 treesize of output 22 [2021-10-28 22:54:33,313 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 22:54:33,314 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 103 treesize of output 85 [2021-10-28 22:54:34,385 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 82 treesize of output 74 [2021-10-28 22:54:34,831 INFO L354 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2021-10-28 22:54:34,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 99 [2021-10-28 22:54:35,465 INFO L354 Elim1Store]: treesize reduction 203, result has 17.8 percent of original size [2021-10-28 22:54:35,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 132 [2021-10-28 22:54:45,988 INFO L354 Elim1Store]: treesize reduction 85, result has 19.0 percent of original size [2021-10-28 22:54:45,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 107 [2021-10-28 22:54:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:54:46,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903556387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:46,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:54:46,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36] total 72 [2021-10-28 22:54:46,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803349950] [2021-10-28 22:54:46,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-28 22:54:46,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:46,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-28 22:54:46,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5019, Unknown=3, NotChecked=0, Total=5256 [2021-10-28 22:54:46,165 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 73 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 61 states have internal predecessors, (104), 10 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-28 22:55:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:38,560 INFO L93 Difference]: Finished difference Result 172 states and 181 transitions. [2021-10-28 22:55:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 22:55:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 61 states have internal predecessors, (104), 10 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 67 [2021-10-28 22:55:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:38,561 INFO L225 Difference]: With dead ends: 172 [2021-10-28 22:55:38,561 INFO L226 Difference]: Without dead ends: 172 [2021-10-28 22:55:38,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=1013, Invalid=13732, Unknown=17, NotChecked=0, Total=14762 [2021-10-28 22:55:38,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-28 22:55:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2021-10-28 22:55:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 106 states have internal predecessors, (118), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:55:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2021-10-28 22:55:38,567 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 67 [2021-10-28 22:55:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:38,568 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2021-10-28 22:55:38,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 61 states have internal predecessors, (104), 10 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-28 22:55:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2021-10-28 22:55:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 22:55:38,569 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:38,569 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:38,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:38,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-28 22:55:38,776 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting sll_circular_remove_firstErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:55:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash -170152214, now seen corresponding path program 1 times [2021-10-28 22:55:38,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:38,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539152641] [2021-10-28 22:55:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:38,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:38,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:38,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:39,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:39,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:39,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:40,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:40,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539152641] [2021-10-28 22:55:40,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539152641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:40,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743066007] [2021-10-28 22:55:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:40,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:40,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:40,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:40,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 22:55:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 22:55:41,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:41,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:55:41,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-10-28 22:55:41,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:55:41,770 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 37 [2021-10-28 22:55:42,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-10-28 22:55:42,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-10-28 22:55:42,282 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 37 treesize of output 29 [2021-10-28 22:55:42,287 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 26 treesize of output 14 [2021-10-28 22:55:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:55:42,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743066007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:42,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:42,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 16] total 49 [2021-10-28 22:55:42,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175485708] [2021-10-28 22:55:42,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 22:55:42,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:42,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 22:55:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2311, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 22:55:42,335 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand has 50 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 42 states have internal predecessors, (103), 6 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2021-10-28 22:55:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:49,812 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2021-10-28 22:55:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-28 22:55:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 42 states have internal predecessors, (103), 6 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 67 [2021-10-28 22:55:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:49,813 INFO L225 Difference]: With dead ends: 233 [2021-10-28 22:55:49,813 INFO L226 Difference]: Without dead ends: 233 [2021-10-28 22:55:49,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1083, Invalid=10259, Unknown=0, NotChecked=0, Total=11342 [2021-10-28 22:55:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-28 22:55:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2021-10-28 22:55:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 131 states have (on average 1.282442748091603) internal successors, (168), 145 states have internal predecessors, (168), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 22:55:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2021-10-28 22:55:49,821 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 67 [2021-10-28 22:55:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:49,821 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2021-10-28 22:55:49,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 42 states have internal predecessors, (103), 6 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2021-10-28 22:55:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2021-10-28 22:55:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 22:55:49,822 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:49,823 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:49,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:50,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 22:55:50,023 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:55:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -140782016, now seen corresponding path program 1 times [2021-10-28 22:55:50,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:50,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739730974] [2021-10-28 22:55:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:50,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:50,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:50,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:50,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:50,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 22:55:50,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:50,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739730974] [2021-10-28 22:55:50,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739730974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:50,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117901295] [2021-10-28 22:55:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:50,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:50,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:50,699 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:50,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 22:55:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:51,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-28 22:55:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:51,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:55:51,902 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 22:55:52,031 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:55:52,031 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 52 treesize of output 42 [2021-10-28 22:55:52,040 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:55:52,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2021-10-28 22:55:53,288 INFO L354 Elim1Store]: treesize reduction 56, result has 27.3 percent of original size [2021-10-28 22:55:53,289 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 250 treesize of output 148 [2021-10-28 22:55:53,372 INFO L354 Elim1Store]: treesize reduction 237, result has 11.2 percent of original size [2021-10-28 22:55:53,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 95 [2021-10-28 22:55:53,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 22:55:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 22:55:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117901295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:53,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:53,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31] total 48 [2021-10-28 22:55:53,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814391437] [2021-10-28 22:55:53,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 22:55:53,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 22:55:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2201, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 22:55:53,600 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 49 states, 47 states have (on average 2.0) internal successors, (94), 38 states have internal predecessors, (94), 8 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:55:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:57,283 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2021-10-28 22:55:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 22:55:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.0) internal successors, (94), 38 states have internal predecessors, (94), 8 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 72 [2021-10-28 22:55:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:57,285 INFO L225 Difference]: With dead ends: 221 [2021-10-28 22:55:57,286 INFO L226 Difference]: Without dead ends: 221 [2021-10-28 22:55:57,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=654, Invalid=7356, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 22:55:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-10-28 22:55:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 184. [2021-10-28 22:55:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 168 states have internal predecessors, (195), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 22:55:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2021-10-28 22:55:57,293 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 72 [2021-10-28 22:55:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:57,294 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2021-10-28 22:55:57,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.0) internal successors, (94), 38 states have internal predecessors, (94), 8 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:55:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2021-10-28 22:55:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 22:55:57,295 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:57,295 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:57,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:57,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 22:55:57,520 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:55:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash -69275061, now seen corresponding path program 1 times [2021-10-28 22:55:57,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:57,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427263829] [2021-10-28 22:55:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:57,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:57,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:57,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:57,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:57,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:57,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 22:55:58,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:58,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427263829] [2021-10-28 22:55:58,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427263829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:58,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850618934] [2021-10-28 22:55:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:58,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:58,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:58,247 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:58,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 22:55:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:59,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-28 22:55:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:59,299 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 22:55:59,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-28 22:55:59,553 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:55:59,553 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 22:55:59,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:55:59,754 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:55:59,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-28 22:56:00,038 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-28 22:56:00,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 30 [2021-10-28 22:56:00,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-28 22:56:00,806 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-10-28 22:56:00,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 40 [2021-10-28 22:56:00,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 22:56:00,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-10-28 22:56:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:01,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850618934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:01,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:01,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 54 [2021-10-28 22:56:01,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640556892] [2021-10-28 22:56:01,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 22:56:01,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 22:56:01,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2805, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 22:56:01,004 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand has 55 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 43 states have internal predecessors, (113), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:56:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:03,844 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2021-10-28 22:56:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 22:56:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 43 states have internal predecessors, (113), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 73 [2021-10-28 22:56:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:03,845 INFO L225 Difference]: With dead ends: 201 [2021-10-28 22:56:03,845 INFO L226 Difference]: Without dead ends: 201 [2021-10-28 22:56:03,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=588, Invalid=6552, Unknown=0, NotChecked=0, Total=7140 [2021-10-28 22:56:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-28 22:56:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 187. [2021-10-28 22:56:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 156 states have (on average 1.2692307692307692) internal successors, (198), 171 states have internal predecessors, (198), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 22:56:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2021-10-28 22:56:03,852 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 73 [2021-10-28 22:56:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:03,853 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2021-10-28 22:56:03,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 43 states have internal predecessors, (113), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 22:56:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2021-10-28 22:56:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 22:56:03,854 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:03,854 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:03,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:04,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 22:56:04,064 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting sll_circular_remove_firstErr11REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:56:04,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2146147630, now seen corresponding path program 1 times [2021-10-28 22:56:04,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:04,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074317182] [2021-10-28 22:56:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:04,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:56:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:56:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:56:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:56:04,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:04,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074317182] [2021-10-28 22:56:04,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074317182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:04,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471927810] [2021-10-28 22:56:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:04,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:04,780 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:04,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 22:56:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-28 22:56:05,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:06,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:56:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-10-28 22:56:06,621 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-28 22:56:06,622 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 55 treesize of output 51 [2021-10-28 22:56:07,589 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 10 treesize of output 9 [2021-10-28 22:56:07,699 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-10-28 22:56:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 71 [2021-10-28 22:56:07,702 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 79 treesize of output 75 [2021-10-28 22:56:11,583 INFO L354 Elim1Store]: treesize reduction 111, result has 25.5 percent of original size [2021-10-28 22:56:11,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 101 [2021-10-28 22:56:11,596 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-28 22:56:11,596 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 83 treesize of output 66 [2021-10-28 22:56:11,775 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-28 22:56:11,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 33 [2021-10-28 22:56:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:56:11,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471927810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:11,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:11,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2021-10-28 22:56:11,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827886567] [2021-10-28 22:56:11,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 22:56:11,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 22:56:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1831, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 22:56:11,865 INFO L87 Difference]: Start difference. First operand 187 states and 218 transitions. Second operand has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 40 states have internal predecessors, (91), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 22:56:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:40,604 INFO L93 Difference]: Finished difference Result 305 states and 344 transitions. [2021-10-28 22:56:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 22:56:40,605 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 40 states have internal predecessors, (91), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2021-10-28 22:56:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:40,607 INFO L225 Difference]: With dead ends: 305 [2021-10-28 22:56:40,607 INFO L226 Difference]: Without dead ends: 305 [2021-10-28 22:56:40,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1140, Invalid=8356, Unknown=10, NotChecked=0, Total=9506 [2021-10-28 22:56:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-28 22:56:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 251. [2021-10-28 22:56:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 213 states have (on average 1.2863849765258215) internal successors, (274), 231 states have internal predecessors, (274), 11 states have call successors, (11), 10 states have call predecessors, (11), 13 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-10-28 22:56:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 305 transitions. [2021-10-28 22:56:40,618 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 305 transitions. Word has length 75 [2021-10-28 22:56:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:40,619 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 305 transitions. [2021-10-28 22:56:40,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 40 states have internal predecessors, (91), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 22:56:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 305 transitions. [2021-10-28 22:56:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-28 22:56:40,620 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:40,620 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:40,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:40,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 22:56:40,834 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:56:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash -776937946, now seen corresponding path program 1 times [2021-10-28 22:56:40,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:40,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313268268] [2021-10-28 22:56:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:40,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:41,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:41,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:41,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:56:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:41,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:56:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:41,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:56:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:42,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:42,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313268268] [2021-10-28 22:56:42,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313268268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:42,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671980010] [2021-10-28 22:56:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:42,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:42,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:42,256 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:42,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 22:56:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:43,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-28 22:56:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:44,201 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-10-28 22:56:44,201 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 84 [2021-10-28 22:56:44,224 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-28 22:56:44,225 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 80 treesize of output 68 [2021-10-28 22:56:44,458 INFO L354 Elim1Store]: treesize reduction 76, result has 38.2 percent of original size [2021-10-28 22:56:44,459 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 120 [2021-10-28 22:56:44,500 INFO L354 Elim1Store]: treesize reduction 76, result has 38.2 percent of original size [2021-10-28 22:56:44,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 125 [2021-10-28 22:56:45,261 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 22:56:45,261 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 83 treesize of output 46 [2021-10-28 22:56:45,264 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:56:45,264 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 37 treesize of output 16 [2021-10-28 22:56:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:56:45,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671980010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:45,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:45,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 20] total 56 [2021-10-28 22:56:45,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286550574] [2021-10-28 22:56:45,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-28 22:56:45,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-28 22:56:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2910, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 22:56:45,276 INFO L87 Difference]: Start difference. First operand 251 states and 305 transitions. Second operand has 56 states, 54 states have (on average 2.240740740740741) internal successors, (121), 49 states have internal predecessors, (121), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 22:56:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:48,879 INFO L93 Difference]: Finished difference Result 223 states and 245 transitions. [2021-10-28 22:56:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 22:56:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 2.240740740740741) internal successors, (121), 49 states have internal predecessors, (121), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 78 [2021-10-28 22:56:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:48,888 INFO L225 Difference]: With dead ends: 223 [2021-10-28 22:56:48,888 INFO L226 Difference]: Without dead ends: 213 [2021-10-28 22:56:48,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=641, Invalid=7191, Unknown=0, NotChecked=0, Total=7832 [2021-10-28 22:56:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-28 22:56:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2021-10-28 22:56:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 164 states have (on average 1.2560975609756098) internal successors, (206), 182 states have internal predecessors, (206), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 22:56:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2021-10-28 22:56:48,897 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 78 [2021-10-28 22:56:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:48,897 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2021-10-28 22:56:48,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 2.240740740740741) internal successors, (121), 49 states have internal predecessors, (121), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 22:56:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2021-10-28 22:56:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 22:56:48,898 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:48,899 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:48,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:49,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 22:56:49,116 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:56:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 688463746, now seen corresponding path program 1 times [2021-10-28 22:56:49,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:49,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343226670] [2021-10-28 22:56:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:49,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:56:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:56:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:56:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-28 22:56:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 22:56:49,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:49,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343226670] [2021-10-28 22:56:49,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343226670] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:49,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:49,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 22:56:49,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83888585] [2021-10-28 22:56:49,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:56:49,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:56:49,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:56:49,308 INFO L87 Difference]: Start difference. First operand 200 states and 229 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-10-28 22:56:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:49,652 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2021-10-28 22:56:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:56:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 82 [2021-10-28 22:56:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:49,654 INFO L225 Difference]: With dead ends: 209 [2021-10-28 22:56:49,654 INFO L226 Difference]: Without dead ends: 209 [2021-10-28 22:56:49,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:56:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-28 22:56:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2021-10-28 22:56:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 184 states have internal predecessors, (208), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 22:56:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 231 transitions. [2021-10-28 22:56:49,663 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 231 transitions. Word has length 82 [2021-10-28 22:56:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:49,663 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 231 transitions. [2021-10-28 22:56:49,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-10-28 22:56:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 231 transitions. [2021-10-28 22:56:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 22:56:49,667 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:49,667 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:49,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-28 22:56:49,667 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:56:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash 688463811, now seen corresponding path program 1 times [2021-10-28 22:56:49,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:49,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601240190] [2021-10-28 22:56:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:49,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:49,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:50,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:56:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:50,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:56:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:50,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:56:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-28 22:56:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:56:51,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:51,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601240190] [2021-10-28 22:56:51,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601240190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:51,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155774353] [2021-10-28 22:56:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:51,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:51,888 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:51,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 22:56:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 118 conjunts are in the unsatisfiable core [2021-10-28 22:56:53,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:53,815 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 22:56:54,048 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:56:54,049 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 74 treesize of output 52 [2021-10-28 22:57:09,758 INFO L354 Elim1Store]: treesize reduction 192, result has 13.5 percent of original size [2021-10-28 22:57:09,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 341 treesize of output 144 [2021-10-28 22:57:09,763 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 220 treesize of output 164 [2021-10-28 22:57:14,087 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-28 22:57:14,087 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 104 treesize of output 67 [2021-10-28 22:57:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:57:14,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155774353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:14,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:14,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38] total 68 [2021-10-28 22:57:14,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659004341] [2021-10-28 22:57:14,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-10-28 22:57:14,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:57:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-10-28 22:57:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4419, Unknown=17, NotChecked=0, Total=4692 [2021-10-28 22:57:14,489 INFO L87 Difference]: Start difference. First operand 202 states and 231 transitions. Second operand has 69 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 59 states have internal predecessors, (123), 10 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-10-28 22:58:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:03,468 INFO L93 Difference]: Finished difference Result 214 states and 242 transitions. [2021-10-28 22:58:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 22:58:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 59 states have internal predecessors, (123), 10 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-10-28 22:58:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:03,470 INFO L225 Difference]: With dead ends: 214 [2021-10-28 22:58:03,470 INFO L226 Difference]: Without dead ends: 211 [2021-10-28 22:58:03,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=537, Invalid=7986, Unknown=33, NotChecked=0, Total=8556 [2021-10-28 22:58:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-28 22:58:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 204. [2021-10-28 22:58:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 168 states have (on average 1.25) internal successors, (210), 185 states have internal predecessors, (210), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 22:58:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 233 transitions. [2021-10-28 22:58:03,478 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 233 transitions. Word has length 82 [2021-10-28 22:58:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:03,478 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 233 transitions. [2021-10-28 22:58:03,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 59 states have internal predecessors, (123), 10 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-10-28 22:58:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 233 transitions. [2021-10-28 22:58:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-28 22:58:03,480 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:58:03,480 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:03,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:03,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 22:58:03,708 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 22:58:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:58:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash -127063222, now seen corresponding path program 1 times [2021-10-28 22:58:03,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:58:03,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405587002] [2021-10-28 22:58:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:03,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:58:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:03,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:58:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:03,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:58:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:03,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:58:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:03,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:58:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:03,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:58:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:03,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-28 22:58:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-28 22:58:03,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:58:03,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405587002] [2021-10-28 22:58:03,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405587002] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:58:03,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225220928] [2021-10-28 22:58:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:58:03,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:58:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:58:03,918 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:58:03,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 22:58:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:58:05,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:58:05,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:58:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-28 22:58:05,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225220928] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:58:05,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:58:05,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-10-28 22:58:05,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764357210] [2021-10-28 22:58:05,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:58:05,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:58:05,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:58:05,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:58:05,468 INFO L87 Difference]: Start difference. First operand 204 states and 233 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 22:58:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:05,483 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-10-28 22:58:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:58:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 83 [2021-10-28 22:58:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:05,484 INFO L225 Difference]: With dead ends: 72 [2021-10-28 22:58:05,484 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 22:58:05,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:58:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 22:58:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 22:58:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:58:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 22:58:05,485 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2021-10-28 22:58:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:05,485 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 22:58:05,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 22:58:05,486 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 22:58:05,486 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 22:58:05,488 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-28 22:58:05,488 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-28 22:58:05,488 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-28 22:58:05,488 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-28 22:58:05,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:58:05,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:58:05,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:58:05,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:58:05,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr0REQUIRES_VIOLATION [2021-10-28 22:58:05,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr1REQUIRES_VIOLATION [2021-10-28 22:58:05,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr2REQUIRES_VIOLATION [2021-10-28 22:58:05,489 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr3REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr0REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr1REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr2REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr3REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr4REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr5REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr6REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr7REQUIRES_VIOLATION [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:05,490 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr11REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr12REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr13REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr14REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr15REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr16REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr17REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr18REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr19REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr20REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr21REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr22REQUIRES_VIOLATION [2021-10-28 22:58:05,491 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr23REQUIRES_VIOLATION [2021-10-28 22:58:05,492 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr24REQUIRES_VIOLATION [2021-10-28 22:58:05,492 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:05,492 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:05,492 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:05,492 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr28REQUIRES_VIOLATION [2021-10-28 22:58:05,492 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr29REQUIRES_VIOLATION [2021-10-28 22:58:05,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:05,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 22:58:05,695 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:05,697 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:58:05,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:58:05 BoogieIcfgContainer [2021-10-28 22:58:05,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:58:05,700 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:58:05,700 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:58:05,700 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:58:05,701 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:52" (3/4) ... [2021-10-28 22:58:05,704 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 22:58:05,711 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 22:58:05,711 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 22:58:05,711 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-28 22:58:05,711 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_remove_first [2021-10-28 22:58:05,711 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 22:58:05,712 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 22:58:05,712 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_create [2021-10-28 22:58:05,712 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 22:58:05,712 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-28 22:58:05,718 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-28 22:58:05,719 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 22:58:05,719 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 22:58:05,719 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:58:05,780 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:58:05,781 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:58:05,782 INFO L168 Benchmark]: Toolchain (without parser) took 374262.87 ms. Allocated memory was 96.5 MB in the beginning and 434.1 MB in the end (delta: 337.6 MB). Free memory was 63.6 MB in the beginning and 152.3 MB in the end (delta: -88.7 MB). Peak memory consumption was 248.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:05,782 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 96.5 MB. Free memory is still 52.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:58:05,789 INFO L168 Benchmark]: CACSL2BoogieTranslator took 522.47 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 63.4 MB in the beginning and 85.1 MB in the end (delta: -21.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:05,790 INFO L168 Benchmark]: Boogie Preprocessor took 61.59 ms. Allocated memory is still 117.4 MB. Free memory was 85.1 MB in the beginning and 82.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:05,790 INFO L168 Benchmark]: RCFGBuilder took 775.30 ms. Allocated memory is still 117.4 MB. Free memory was 82.0 MB in the beginning and 57.3 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:05,790 INFO L168 Benchmark]: TraceAbstraction took 372817.07 ms. Allocated memory was 117.4 MB in the beginning and 434.1 MB in the end (delta: 316.7 MB). Free memory was 56.9 MB in the beginning and 156.5 MB in the end (delta: -99.6 MB). Peak memory consumption was 219.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:05,791 INFO L168 Benchmark]: Witness Printer took 80.58 ms. Allocated memory is still 434.1 MB. Free memory was 156.5 MB in the beginning and 152.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:05,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 96.5 MB. Free memory is still 52.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 522.47 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 63.4 MB in the beginning and 85.1 MB in the end (delta: -21.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.59 ms. Allocated memory is still 117.4 MB. Free memory was 85.1 MB in the beginning and 82.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 775.30 ms. Allocated memory is still 117.4 MB. Free memory was 82.0 MB in the beginning and 57.3 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 372817.07 ms. Allocated memory was 117.4 MB in the beginning and 434.1 MB in the end (delta: 316.7 MB). Free memory was 56.9 MB in the beginning and 156.5 MB in the end (delta: -99.6 MB). Peak memory consumption was 219.5 MB. Max. memory is 16.1 GB. * Witness Printer took 80.58 ms. Allocated memory is still 434.1 MB. Free memory was 156.5 MB in the beginning and 152.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 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 - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 623]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 610]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 601]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 601]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 602]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 602]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 602]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 602]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 607]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 118 locations, 42 error locations. Started 1 CEGAR loops. OverallTime: 372.7s, OverallIterations: 40, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 266.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1950 SDtfs, 9683 SDslu, 13137 SDs, 0 SdLazy, 51858 SolverSat, 1637 SolverUnsat, 210 SolverUnknown, 0 SolverNotchecked, 181.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2805 GetRequests, 1173 SyntacticMatches, 32 SemanticMatches, 1600 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21430 ImplicationChecksByTransitivity, 126.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=251occurred in iteration=36, InterpolantAutomatonStates: 874, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 40 MinimizatonAttempts, 634 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 85.9s InterpolantComputationTime, 3307 NumberOfCodeBlocks, 3307 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 3245 ConstructedInterpolants, 229 QuantifiedInterpolants, 54587 SizeOfPredicates, 405 NumberOfNonLiveVariables, 7894 ConjunctsInSsa, 1465 ConjunctsInUnsatCore, 62 InterpolantComputations, 20 PerfectInterpolantSequences, 444/818 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 - AllSpecificationsHoldResult: All specifications hold 42 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 22:58:06,006 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-28 22:58:06,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fc9f89c-eeb4-4de8-9917-0be8da9e9b8f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...