./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU --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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:55:46,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:55:46,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:55:47,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:55:47,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:55:47,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:55:47,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:55:47,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:55:47,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:55:47,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:55:47,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:55:47,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:55:47,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:55:47,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:55:47,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:55:47,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:55:47,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:55:47,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:55:47,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:55:47,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:55:47,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:55:47,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:55:47,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:55:47,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:55:47,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:55:47,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:55:47,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:55:47,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:55:47,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:55:47,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:55:47,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:55:47,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:55:47,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:55:47,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:55:47,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:55:47,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:55:47,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:55:47,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:55:47,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:55:47,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:55:47,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:55:47,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:55:47,169 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:55:47,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:55:47,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:55:47,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:55:47,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:55:47,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:55:47,183 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:55:47,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:55:47,184 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:55:47,184 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:55:47,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:55:47,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:55:47,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:55:47,186 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:55:47,187 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:55:47,187 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:55:47,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:55:47,188 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:55:47,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:55:47,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:55:47,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:55:47,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:55:47,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:55:47,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:55:47,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:55:47,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:55:47,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:55:47,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:55:47,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:55:47,193 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_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2021-11-02 22:55:47,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:55:47,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:55:47,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:55:47,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:55:47,581 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:55:47,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-11-02 22:55:47,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/data/b48cf2ad7/c829a94e904f4a3aaf5b2380152322fb/FLAG6a4bc9714 [2021-11-02 22:55:48,304 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:55:48,305 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-11-02 22:55:48,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/data/b48cf2ad7/c829a94e904f4a3aaf5b2380152322fb/FLAG6a4bc9714 [2021-11-02 22:55:48,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/data/b48cf2ad7/c829a94e904f4a3aaf5b2380152322fb [2021-11-02 22:55:48,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:55:48,598 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:55:48,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:55:48,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:55:48,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:55:48,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:55:48" (1/1) ... [2021-11-02 22:55:48,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb05b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:48, skipping insertion in model container [2021-11-02 22:55:48,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:55:48" (1/1) ... [2021-11-02 22:55:48,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:55:48,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:55:49,086 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_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-11-02 22:55:49,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:55:49,108 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:55:49,202 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_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-11-02 22:55:49,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:55:49,253 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:55:49,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49 WrapperNode [2021-11-02 22:55:49,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:55:49,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:55:49,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:55:49,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:55:49,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (1/1) ... [2021-11-02 22:55:49,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (1/1) ... [2021-11-02 22:55:49,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (1/1) ... [2021-11-02 22:55:49,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (1/1) ... [2021-11-02 22:55:49,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (1/1) ... [2021-11-02 22:55:49,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (1/1) ... [2021-11-02 22:55:49,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (1/1) ... [2021-11-02 22:55:49,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:55:49,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:55:49,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:55:49,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:55:49,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (1/1) ... [2021-11-02 22:55:49,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:55:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:49,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:55:49,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:55:49,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:55:49,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:55:49,504 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:55:49,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:55:49,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:55:49,504 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 22:55:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-02 22:55:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-11-02 22:55:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-11-02 22:55:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2021-11-02 22:55:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:55:49,505 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:55:49,505 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:55:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:55:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:55:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:55:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:55:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:55:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:55:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:55:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:55:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:55:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:55:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:55:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:55:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:55:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:55:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:55:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:55:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:55:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:55:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:55:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:55:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:55:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:55:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:55:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:55:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:55:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:55:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:55:49,511 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:55:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:55:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:55:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:55:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:55:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:55:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:55:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:55:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:55:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:55:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:55:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:55:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:55:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:55:49,514 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:55:49,514 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:55:49,514 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:55:49,514 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:55:49,514 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:55:49,514 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:55:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:55:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:55:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:55:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:55:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:55:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:55:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:55:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:55:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:55:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:55:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:55:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:55:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:55:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:55:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:55:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:55:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:55:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:55:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:55:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:55:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:55:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:55:49,518 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:55:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:55:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:55:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:55:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:55:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:55:49,519 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:55:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:55:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:55:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:55:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:55:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:55:49,520 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:55:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:55:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:55:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:55:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:55:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:55:49,521 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:55:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:55:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:55:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:55:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:55:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:55:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:55:49,522 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:55:49,523 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:55:49,523 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:55:49,523 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:55:49,523 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:55:49,523 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:55:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:55:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:55:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:55:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:55:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:55:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:55:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:55:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:55:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 22:55:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-02 22:55:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:55:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-11-02 22:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-11-02 22:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:55:49,526 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2021-11-02 22:55:49,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:55:49,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:55:49,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:55:49,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:55:49,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:55:49,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:55:49,852 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 22:55:50,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:55:50,327 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 22:55:50,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:55:50 BoogieIcfgContainer [2021-11-02 22:55:50,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:55:50,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:55:50,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:55:50,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:55:50,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:55:48" (1/3) ... [2021-11-02 22:55:50,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a5208c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:55:50, skipping insertion in model container [2021-11-02 22:55:50,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:55:49" (2/3) ... [2021-11-02 22:55:50,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a5208c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:55:50, skipping insertion in model container [2021-11-02 22:55:50,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:55:50" (3/3) ... [2021-11-02 22:55:50,357 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2021-11-02 22:55:50,364 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:55:50,364 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-11-02 22:55:50,457 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:55:50,465 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:55:50,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-11-02 22:55:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 84 states have internal predecessors, (96), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:55:50,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:55:50,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:50,499 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:50,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:55:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1024606834, now seen corresponding path program 1 times [2021-11-02 22:55:50,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:50,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996935801] [2021-11-02 22:55:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:50,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:50,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:50,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:50,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996935801] [2021-11-02 22:55:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996935801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:50,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:50,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:55:50,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736728667] [2021-11-02 22:55:50,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:50,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:50,880 INFO L87 Difference]: Start difference. First operand has 99 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 84 states have internal predecessors, (96), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:55:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:51,220 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-11-02 22:55:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 13 [2021-11-02 22:55:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:51,235 INFO L225 Difference]: With dead ends: 115 [2021-11-02 22:55:51,235 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 22:55:51,237 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 [2021-11-02 22:55:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 22:55:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-11-02 22:55:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.68) internal successors, (84), 78 states have internal predecessors, (84), 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) [2021-11-02 22:55:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-11-02 22:55:51,295 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 13 [2021-11-02 22:55:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:51,296 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-11-02 22:55:51,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:55:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-11-02 22:55:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:55:51,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:51,298 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:51,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:55:51,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:55:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1024606835, now seen corresponding path program 1 times [2021-11-02 22:55:51,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:51,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184455404] [2021-11-02 22:55:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:51,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:51,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:51,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:51,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184455404] [2021-11-02 22:55:51,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184455404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:51,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:51,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:55:51,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297161562] [2021-11-02 22:55:51,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:51,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:51,485 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:55:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:51,745 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2021-11-02 22:55:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 13 [2021-11-02 22:55:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:51,748 INFO L225 Difference]: With dead ends: 107 [2021-11-02 22:55:51,749 INFO L226 Difference]: Without dead ends: 107 [2021-11-02 22:55:51,749 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 [2021-11-02 22:55:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-02 22:55:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2021-11-02 22:55:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.64) internal successors, (82), 76 states have internal predecessors, (82), 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) [2021-11-02 22:55:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2021-11-02 22:55:51,783 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 13 [2021-11-02 22:55:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:51,783 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2021-11-02 22:55:51,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-02 22:55:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2021-11-02 22:55:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:55:51,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:51,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:51,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:55:51,786 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:55:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:51,787 INFO L85 PathProgramCache]: Analyzing trace with hash -640130732, now seen corresponding path program 1 times [2021-11-02 22:55:51,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:51,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292210802] [2021-11-02 22:55:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:51,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:51,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:52,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 22:55:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:52,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:52,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292210802] [2021-11-02 22:55:52,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292210802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:52,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:52,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:55:52,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784746282] [2021-11-02 22:55:52,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:55:52,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:55:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:55:52,088 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:55:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:52,637 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-11-02 22:55:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:55:52,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-02 22:55:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:52,640 INFO L225 Difference]: With dead ends: 106 [2021-11-02 22:55:52,640 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 22:55:52,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:55:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 22:55:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2021-11-02 22:55:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.62) internal successors, (81), 75 states have internal predecessors, (81), 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) [2021-11-02 22:55:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-11-02 22:55:52,651 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 19 [2021-11-02 22:55:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:52,651 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-11-02 22:55:52,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:55:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-11-02 22:55:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:55:52,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:52,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:52,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:55:52,653 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:55:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:52,654 INFO L85 PathProgramCache]: Analyzing trace with hash -640130731, now seen corresponding path program 1 times [2021-11-02 22:55:52,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:52,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257169110] [2021-11-02 22:55:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:52,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:52,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:52,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 22:55:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:52,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:52,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257169110] [2021-11-02 22:55:52,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257169110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:52,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:52,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:55:52,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112341319] [2021-11-02 22:55:52,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:55:52,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:55:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:55:52,930 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:55:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:53,437 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-02 22:55:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:55:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-02 22:55:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:53,440 INFO L225 Difference]: With dead ends: 105 [2021-11-02 22:55:53,440 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:55:53,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:55:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:55:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-11-02 22:55:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 50 states have (on average 1.6) internal successors, (80), 74 states have internal predecessors, (80), 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) [2021-11-02 22:55:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-11-02 22:55:53,449 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 19 [2021-11-02 22:55:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:53,450 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-11-02 22:55:53,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:55:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-11-02 22:55:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:55:53,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:53,452 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:53,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:55:53,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:55:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1619934118, now seen corresponding path program 1 times [2021-11-02 22:55:53,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:53,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474594640] [2021-11-02 22:55:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:53,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:53,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:53,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:55:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:53,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:55:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:53,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:53,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474594640] [2021-11-02 22:55:53,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474594640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:53,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:53,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:55:53,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252056745] [2021-11-02 22:55:53,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:55:53,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:55:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:55:53,569 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:55:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:53,922 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2021-11-02 22:55:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:55:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-02 22:55:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:53,924 INFO L225 Difference]: With dead ends: 109 [2021-11-02 22:55:53,925 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 22:55:53,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:55:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 22:55:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2021-11-02 22:55:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.588235294117647) internal successors, (81), 75 states have internal predecessors, (81), 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) [2021-11-02 22:55:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-11-02 22:55:53,934 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 25 [2021-11-02 22:55:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:53,935 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-11-02 22:55:53,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-02 22:55:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-11-02 22:55:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:55:53,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:53,938 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] [2021-11-02 22:55:53,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:55:53,938 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:55:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1524450116, now seen corresponding path program 1 times [2021-11-02 22:55:53,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:53,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700732490] [2021-11-02 22:55:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:53,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:54,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:54,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:55:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:54,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:55:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:54,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:55:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:55:54,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:54,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700732490] [2021-11-02 22:55:54,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700732490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:54,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549341048] [2021-11-02 22:55:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:54,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:54,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:54,176 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:54,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:55:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:55:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:54,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549341048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:54,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:55:54,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-02 22:55:54,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271573932] [2021-11-02 22:55:54,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:55:54,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:54,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:55:54,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:55:54,717 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-02 22:55:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:55,120 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-11-02 22:55:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:55:55,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2021-11-02 22:55:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:55,123 INFO L225 Difference]: With dead ends: 115 [2021-11-02 22:55:55,123 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 22:55:55,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:55:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 22:55:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-11-02 22:55:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 80 states have internal predecessors, (86), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:55:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-11-02 22:55:55,132 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 38 [2021-11-02 22:55:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:55,133 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-11-02 22:55:55,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-02 22:55:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-11-02 22:55:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:55:55,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:55,136 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:55,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:55,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:55,354 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:55:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1347685478, now seen corresponding path program 2 times [2021-11-02 22:55:55,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:55,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187150311] [2021-11-02 22:55:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:55,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:55,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:55,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:55:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:55,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:55:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:55:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:55:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:55:56,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:56,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187150311] [2021-11-02 22:55:56,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187150311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:56,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624304252] [2021-11-02 22:55:56,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:55:56,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:56,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:56,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:56,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:55:56,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:55:56,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:55:56,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:55:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:56,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:55:56,532 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 [2021-11-02 22:55:56,811 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-02 22:55:56,811 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 15 treesize of output 19 [2021-11-02 22:55:56,926 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 [2021-11-02 22:55:57,154 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:55:57,154 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 17 treesize of output 19 [2021-11-02 22:55:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:55:57,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624304252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:57,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:55:57,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-02 22:55:57,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977418380] [2021-11-02 22:55:57,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:55:57,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:55:57,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:55:57,233 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:55:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:58,850 INFO L93 Difference]: Finished difference Result 161 states and 179 transitions. [2021-11-02 22:55:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:55:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 51 [2021-11-02 22:55:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:58,853 INFO L225 Difference]: With dead ends: 161 [2021-11-02 22:55:58,853 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 22:55:58,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:55:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 22:55:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2021-11-02 22:55:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 99 states have internal predecessors, (117), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:55:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2021-11-02 22:55:58,871 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 51 [2021-11-02 22:55:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:58,872 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2021-11-02 22:55:58,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:55:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2021-11-02 22:55:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:55:58,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:58,885 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:58,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:59,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:59,117 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_insertErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:55:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1347685479, now seen corresponding path program 1 times [2021-11-02 22:55:59,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:59,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906349158] [2021-11-02 22:55:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:59,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:59,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:59,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:55:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:59,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:55:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:59,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:55:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:59,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:55:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:55:59,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:59,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906349158] [2021-11-02 22:55:59,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906349158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:59,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249825253] [2021-11-02 22:55:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:59,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:59,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:59,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:59,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:56:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:56:00,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:00,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:56:00,174 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 [2021-11-02 22:56:00,869 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-02 22:56:00,870 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 21 treesize of output 25 [2021-11-02 22:56:01,135 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:56:01,136 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 19 treesize of output 15 [2021-11-02 22:56:01,260 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 22:56:01,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-02 22:56:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:56:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249825253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:01,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:01,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-02 22:56:01,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075306708] [2021-11-02 22:56:01,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:56:01,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:56:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:56:01,356 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:56:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:02,805 INFO L93 Difference]: Finished difference Result 183 states and 201 transitions. [2021-11-02 22:56:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:56:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2021-11-02 22:56:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:02,808 INFO L225 Difference]: With dead ends: 183 [2021-11-02 22:56:02,808 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 22:56:02,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:56:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 22:56:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 126. [2021-11-02 22:56:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 85 states have (on average 1.5176470588235293) internal successors, (129), 107 states have internal predecessors, (129), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:56:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2021-11-02 22:56:02,826 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 51 [2021-11-02 22:56:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:02,827 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2021-11-02 22:56:02,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:56:02,828 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2021-11-02 22:56:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:56:02,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:02,833 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:02,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:03,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:56:03,057 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_insertErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:56:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash -456106334, now seen corresponding path program 1 times [2021-11-02 22:56:03,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:03,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147541051] [2021-11-02 22:56:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:03,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:03,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:03,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:56:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:03,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:56:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:03,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:56:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:03,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:56:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:56:04,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:04,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147541051] [2021-11-02 22:56:04,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147541051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:04,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437793099] [2021-11-02 22:56:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:04,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:04,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:04,008 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:04,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:56:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-02 22:56:04,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:04,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:56:05,308 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 [2021-11-02 22:56:05,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-02 22:56:10,102 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-02 22:56:10,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 78 [2021-11-02 22:56:10,135 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 22:56:10,135 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 79 treesize of output 81 [2021-11-02 22:56:10,193 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-02 22:56:10,194 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 2 case distinctions, treesize of input 78 treesize of output 66 [2021-11-02 22:56:10,215 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 22:56:10,215 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 67 treesize of output 67 [2021-11-02 22:56:10,560 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:56:10,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 57 [2021-11-02 22:56:10,582 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:56:10,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 33 [2021-11-02 22:56:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:56:10,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437793099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:10,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:10,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 40 [2021-11-02 22:56:10,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52162476] [2021-11-02 22:56:10,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 22:56:10,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 22:56:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1537, Unknown=2, NotChecked=0, Total=1640 [2021-11-02 22:56:10,891 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 41 states, 34 states have (on average 2.088235294117647) internal successors, (71), 32 states have internal predecessors, (71), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-02 22:57:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:13,045 INFO L93 Difference]: Finished difference Result 163 states and 198 transitions. [2021-11-02 22:57:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:57:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.088235294117647) internal successors, (71), 32 states have internal predecessors, (71), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-11-02 22:57:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:13,050 INFO L225 Difference]: With dead ends: 163 [2021-11-02 22:57:13,050 INFO L226 Difference]: Without dead ends: 163 [2021-11-02 22:57:13,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=276, Invalid=3497, Unknown=9, NotChecked=0, Total=3782 [2021-11-02 22:57:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-02 22:57:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 130. [2021-11-02 22:57:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 89 states have (on average 1.5393258426966292) internal successors, (137), 111 states have internal predecessors, (137), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:57:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2021-11-02 22:57:13,063 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 54 [2021-11-02 22:57:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:13,064 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2021-11-02 22:57:13,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.088235294117647) internal successors, (71), 32 states have internal predecessors, (71), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-02 22:57:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2021-11-02 22:57:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:57:13,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:13,066 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:13,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:57:13,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-02 22:57:13,281 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_insertErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:57:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash -456106335, now seen corresponding path program 1 times [2021-11-02 22:57:13,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:13,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109180715] [2021-11-02 22:57:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:13,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:13,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:57:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:13,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:57:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:14,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:57:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:14,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:57:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:14,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:57:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:57:14,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:14,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109180715] [2021-11-02 22:57:14,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109180715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:14,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773074075] [2021-11-02 22:57:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:14,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:14,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:14,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:14,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:57:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:57:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:15,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:57:16,142 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 13 treesize of output 9 [2021-11-02 22:57:23,128 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-02 22:57:23,128 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 2 case distinctions, treesize of input 41 treesize of output 33 [2021-11-02 22:57:23,165 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 22:57:23,166 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 30 treesize of output 32 [2021-11-02 22:57:23,443 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:57:23,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-11-02 22:57:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:57:23,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773074075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:23,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:57:23,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 30 [2021-11-02 22:57:23,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077341737] [2021-11-02 22:57:23,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:57:23,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:57:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=846, Unknown=3, NotChecked=0, Total=930 [2021-11-02 22:57:23,515 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand has 31 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:58:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:19,032 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2021-11-02 22:58:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:58:19,034 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2021-11-02 22:58:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:19,036 INFO L225 Difference]: With dead ends: 160 [2021-11-02 22:58:19,036 INFO L226 Difference]: Without dead ends: 160 [2021-11-02 22:58:19,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=201, Invalid=1953, Unknown=8, NotChecked=0, Total=2162 [2021-11-02 22:58:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-02 22:58:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2021-11-02 22:58:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 111 states have internal predecessors, (135), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:58:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2021-11-02 22:58:19,047 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 54 [2021-11-02 22:58:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:19,047 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2021-11-02 22:58:19,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:58:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2021-11-02 22:58:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:58:19,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:19,049 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:19,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:58:19,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:19,257 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_insertErr4REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1254396018, now seen corresponding path program 1 times [2021-11-02 22:58:19,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:19,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451610141] [2021-11-02 22:58:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:19,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:19,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:19,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:19,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:19,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:19,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:58:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 22:58:19,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:19,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451610141] [2021-11-02 22:58:19,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451610141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:58:19,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:58:19,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:58:19,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203255780] [2021-11-02 22:58:19,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:58:19,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:58:19,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:58:19,512 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-11-02 22:58:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:20,163 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2021-11-02 22:58:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:58:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 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 55 [2021-11-02 22:58:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:20,166 INFO L225 Difference]: With dead ends: 153 [2021-11-02 22:58:20,166 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 22:58:20,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:58:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 22:58:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2021-11-02 22:58:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 113 states have internal predecessors, (137), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:58:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2021-11-02 22:58:20,175 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 55 [2021-11-02 22:58:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:20,177 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2021-11-02 22:58:20,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-11-02 22:58:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2021-11-02 22:58:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:58:20,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:20,180 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:20,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:58:20,181 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_insertErr8REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash -231565803, now seen corresponding path program 1 times [2021-11-02 22:58:20,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:20,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622622748] [2021-11-02 22:58:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:20,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:20,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:20,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:20,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:58:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:58:20,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:20,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622622748] [2021-11-02 22:58:20,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622622748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:58:20,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:58:20,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:58:20,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195155898] [2021-11-02 22:58:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:58:20,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:58:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:58:20,572 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:58:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:21,725 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2021-11-02 22:58:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:58:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2021-11-02 22:58:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:21,728 INFO L225 Difference]: With dead ends: 144 [2021-11-02 22:58:21,728 INFO L226 Difference]: Without dead ends: 144 [2021-11-02 22:58:21,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:58:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-02 22:58:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2021-11-02 22:58:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.4835164835164836) internal successors, (135), 112 states have internal predecessors, (135), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:58:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 157 transitions. [2021-11-02 22:58:21,736 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 157 transitions. Word has length 56 [2021-11-02 22:58:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:21,737 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 157 transitions. [2021-11-02 22:58:21,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:58:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 157 transitions. [2021-11-02 22:58:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:58:21,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:21,739 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:21,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:58:21,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_insertErr9REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash -231565802, now seen corresponding path program 1 times [2021-11-02 22:58:21,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:21,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215216429] [2021-11-02 22:58:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:21,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:21,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:22,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:22,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:22,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:22,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:58:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 22:58:22,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:22,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215216429] [2021-11-02 22:58:22,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215216429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:58:22,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:58:22,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:58:22,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073248713] [2021-11-02 22:58:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:58:22,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:58:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:58:22,087 INFO L87 Difference]: Start difference. First operand 131 states and 157 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:58:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:23,001 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2021-11-02 22:58:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:58:23,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2021-11-02 22:58:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:23,004 INFO L225 Difference]: With dead ends: 142 [2021-11-02 22:58:23,004 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 22:58:23,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:58:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 22:58:23,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-11-02 22:58:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 89 states have (on average 1.4719101123595506) internal successors, (131), 110 states have internal predecessors, (131), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:58:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2021-11-02 22:58:23,011 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 56 [2021-11-02 22:58:23,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:23,011 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2021-11-02 22:58:23,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:58:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2021-11-02 22:58:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:58:23,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:23,013 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:58:23,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:58:23,014 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_insertErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:23,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1412812628, now seen corresponding path program 1 times [2021-11-02 22:58:23,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:23,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478542533] [2021-11-02 22:58:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:23,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:23,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:23,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:23,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:23,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:58:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 22:58:23,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:23,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478542533] [2021-11-02 22:58:23,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478542533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:58:23,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:58:23,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:58:23,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073171010] [2021-11-02 22:58:23,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:58:23,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:58:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:58:23,354 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:58:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:24,553 INFO L93 Difference]: Finished difference Result 138 states and 159 transitions. [2021-11-02 22:58:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:58:24,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 57 [2021-11-02 22:58:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:24,555 INFO L225 Difference]: With dead ends: 138 [2021-11-02 22:58:24,555 INFO L226 Difference]: Without dead ends: 138 [2021-11-02 22:58:24,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:58:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-02 22:58:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 125. [2021-11-02 22:58:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 87 states have (on average 1.4137931034482758) internal successors, (123), 106 states have internal predecessors, (123), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:58:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2021-11-02 22:58:24,567 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 57 [2021-11-02 22:58:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:24,568 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2021-11-02 22:58:24,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:58:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2021-11-02 22:58:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:58:24,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:24,570 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:24,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:58:24,570 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_insertErr4REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash 847516956, now seen corresponding path program 1 times [2021-11-02 22:58:24,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:24,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175276878] [2021-11-02 22:58:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:24,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:24,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:24,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:24,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:24,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:58:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 22:58:24,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:24,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175276878] [2021-11-02 22:58:24,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175276878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:58:24,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:58:24,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:58:24,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111053193] [2021-11-02 22:58:24,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:58:24,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:58:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:58:24,851 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-11-02 22:58:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:25,722 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2021-11-02 22:58:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:58:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 58 [2021-11-02 22:58:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:25,724 INFO L225 Difference]: With dead ends: 137 [2021-11-02 22:58:25,724 INFO L226 Difference]: Without dead ends: 137 [2021-11-02 22:58:25,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:58:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-02 22:58:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2021-11-02 22:58:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 105 states have internal predecessors, (121), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:58:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2021-11-02 22:58:25,735 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 58 [2021-11-02 22:58:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:25,736 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2021-11-02 22:58:25,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-11-02 22:58:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2021-11-02 22:58:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:58:25,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:25,737 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:25,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:58:25,738 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_insertErr5REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash 847516957, now seen corresponding path program 1 times [2021-11-02 22:58:25,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:25,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816406553] [2021-11-02 22:58:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:25,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:26,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:26,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:26,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:26,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:26,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:58:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:58:27,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:27,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816406553] [2021-11-02 22:58:27,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816406553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:27,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961115412] [2021-11-02 22:58:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:27,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:58:27,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:58:27,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:58:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:58:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:58:27,981 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 7 treesize of output 3 [2021-11-02 22:58:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 22:58:28,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961115412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:58:28,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:58:28,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [22] total 24 [2021-11-02 22:58:28,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233906165] [2021-11-02 22:58:28,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:58:28,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:58:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:58:28,303 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:58:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:28,501 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2021-11-02 22:58:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:58:28,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 1 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 58 [2021-11-02 22:58:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:28,503 INFO L225 Difference]: With dead ends: 123 [2021-11-02 22:58:28,504 INFO L226 Difference]: Without dead ends: 123 [2021-11-02 22:58:28,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:58:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-02 22:58:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-02 22:58:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 87 states have (on average 1.367816091954023) internal successors, (119), 104 states have internal predecessors, (119), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:58:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2021-11-02 22:58:28,512 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 58 [2021-11-02 22:58:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:28,513 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2021-11-02 22:58:28,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:58:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2021-11-02 22:58:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:58:28,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:28,515 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:28,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:58:28,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:28,729 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_insertErr9REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:28,729 INFO L85 PathProgramCache]: Analyzing trace with hash 503221992, now seen corresponding path program 1 times [2021-11-02 22:58:28,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:28,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497624912] [2021-11-02 22:58:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:28,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:29,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:29,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:29,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-02 22:58:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:58:29,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:29,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497624912] [2021-11-02 22:58:29,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497624912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:58:29,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:58:29,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:58:29,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870066271] [2021-11-02 22:58:29,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:58:29,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:58:29,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:58:29,165 INFO L87 Difference]: Start difference. First operand 123 states and 141 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), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:58:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:30,144 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2021-11-02 22:58:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:58:30,145 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), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-11-02 22:58:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:30,147 INFO L225 Difference]: With dead ends: 135 [2021-11-02 22:58:30,147 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 22:58:30,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:58:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 22:58:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2021-11-02 22:58:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 103 states have internal predecessors, (117), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:58:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2021-11-02 22:58:30,154 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 59 [2021-11-02 22:58:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:30,155 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2021-11-02 22:58:30,155 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), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 22:58:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2021-11-02 22:58:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:58:30,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:30,156 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:30,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:58:30,157 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:30,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1923044732, now seen corresponding path program 3 times [2021-11-02 22:58:30,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:30,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144585057] [2021-11-02 22:58:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:30,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:30,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:30,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:30,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:30,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:30,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-02 22:58:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:30,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-02 22:58:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-02 22:58:30,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:30,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144585057] [2021-11-02 22:58:30,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144585057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:30,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301418956] [2021-11-02 22:58:30,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:58:30,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:30,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:58:30,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:58:30,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:58:31,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:58:31,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:58:31,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:58:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:58:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:58:31,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301418956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:31,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:58:31,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-11-02 22:58:31,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514077938] [2021-11-02 22:58:31,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:58:31,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:31,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:58:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:58:31,664 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:58:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:32,625 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-11-02 22:58:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:58:32,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2021-11-02 22:58:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:32,627 INFO L225 Difference]: With dead ends: 103 [2021-11-02 22:58:32,628 INFO L226 Difference]: Without dead ends: 94 [2021-11-02 22:58:32,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:58:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-02 22:58:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-11-02 22:58:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 67 states have internal predecessors, (71), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:58:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-11-02 22:58:32,634 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 64 [2021-11-02 22:58:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:32,634 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-11-02 22:58:32,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:58:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-11-02 22:58:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:58:32,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:32,636 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:32,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:58:32,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:58:32,857 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-02 22:58:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2066173258, now seen corresponding path program 1 times [2021-11-02 22:58:32,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:32,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067420153] [2021-11-02 22:58:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:32,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:33,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:33,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:58:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:33,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 22:58:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:33,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 22:58:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:33,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-02 22:58:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:35,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:58:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:58:35,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:35,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067420153] [2021-11-02 22:58:35,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067420153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:35,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731879844] [2021-11-02 22:58:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:35,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:58:35,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:58:35,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a8b4a19-16ea-41a8-bb9f-636781ac4e94/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:58:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 22:58:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:58:36,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:58:37,373 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 11 [2021-11-02 22:59:35,016 INFO L354 Elim1Store]: treesize reduction 1294, result has 21.3 percent of original size [2021-11-02 22:59:35,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 880 treesize of output 568 [2021-11-02 22:59:35,137 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:59:35,138 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 568 treesize of output 572 [2021-11-02 23:08:06,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:07,117 INFO L354 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2021-11-02 23:08:07,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 154 treesize of output 162 [2021-11-02 23:08:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:12,263 INFO L354 Elim1Store]: treesize reduction 52, result has 44.1 percent of original size [2021-11-02 23:08:12,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 1167 treesize of output 971 [2021-11-02 23:08:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:26,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:26,576 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 23:08:26,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 66 [2021-11-02 23:08:26,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:26,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:26,959 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-11-02 23:08:26,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 41 [2021-11-02 23:08:34,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:34,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:34,899 INFO L354 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2021-11-02 23:08:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 40 [2021-11-02 23:08:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:36,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:36,570 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-11-02 23:08:36,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 31 [2021-11-02 23:08:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:36,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:36,881 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-02 23:08:36,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 42 [2021-11-02 23:08:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:37,332 INFO L354 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2021-11-02 23:08:37,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 42 [2021-11-02 23:08:37,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:37,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:37,634 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-02 23:08:37,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-02 23:08:41,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:41,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:41,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-11-02 23:08:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:41,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:41,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2021-11-02 23:08:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:42,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-11-02 23:08:42,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:42,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:42,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-11-02 23:08:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:49,800 INFO L354 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2021-11-02 23:08:49,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 157 treesize of output 163 [2021-11-02 23:08:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:08:56,477 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-02 23:08:56,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 171