./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:38:43,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:38:43,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:38:43,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:38:43,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:38:43,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:38:43,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:38:43,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:38:43,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:38:44,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:38:44,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:38:44,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:38:44,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:38:44,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:38:44,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:38:44,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:38:44,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:38:44,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:38:44,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:38:44,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:38:44,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:38:44,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:38:44,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:38:44,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:38:44,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:38:44,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:38:44,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:38:44,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:38:44,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:38:44,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:38:44,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:38:44,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:38:44,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:38:44,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:38:44,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:38:44,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:38:44,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:38:44,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:38:44,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:38:44,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:38:44,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:38:44,090 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:38:44,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:38:44,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:38:44,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:38:44,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:38:44,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:38:44,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:38:44,146 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:38:44,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:38:44,147 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:38:44,147 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:38:44,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:38:44,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:38:44,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:38:44,148 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:38:44,148 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:38:44,149 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:38:44,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:38:44,149 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:38:44,150 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:38:44,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:38:44,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:38:44,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:38:44,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:38:44,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:38:44,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:38:44,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:38:44,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:38:44,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:38:44,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:38:44,153 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_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd [2021-10-21 19:38:44,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:38:44,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:38:44,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:38:44,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:38:44,492 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:38:44,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-10-21 19:38:44,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/data/79e12311f/f2787f0942c74a428066ad03972570ec/FLAG1fef7f4b3 [2021-10-21 19:38:45,258 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:38:45,268 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-10-21 19:38:45,303 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/data/79e12311f/f2787f0942c74a428066ad03972570ec/FLAG1fef7f4b3 [2021-10-21 19:38:45,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/data/79e12311f/f2787f0942c74a428066ad03972570ec [2021-10-21 19:38:45,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:38:45,512 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:38:45,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:38:45,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:38:45,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:38:45,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:38:45" (1/1) ... [2021-10-21 19:38:45,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46c78c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:45, skipping insertion in model container [2021-10-21 19:38:45,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:38:45" (1/1) ... [2021-10-21 19:38:45,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:38:45,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:38:46,012 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_c3652042-8d12-4a07-9689-e38cf5951a3b/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-10-21 19:38:46,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:38:46,045 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:38:46,122 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_c3652042-8d12-4a07-9689-e38cf5951a3b/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-10-21 19:38:46,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:38:46,160 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:38:46,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46 WrapperNode [2021-10-21 19:38:46,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:38:46,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:38:46,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:38:46,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:38:46,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (1/1) ... [2021-10-21 19:38:46,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (1/1) ... [2021-10-21 19:38:46,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (1/1) ... [2021-10-21 19:38:46,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (1/1) ... [2021-10-21 19:38:46,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (1/1) ... [2021-10-21 19:38:46,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (1/1) ... [2021-10-21 19:38:46,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (1/1) ... [2021-10-21 19:38:46,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:38:46,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:38:46,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:38:46,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:38:46,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (1/1) ... [2021-10-21 19:38:46,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:38:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:46,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:38:46,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:38:46,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:38:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:38:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:38:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:38:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:38:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:38:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-21 19:38:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-10-21 19:38:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_first [2021-10-21 19:38:46,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:38:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:38:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:38:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:38:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:38:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:38:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:38:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:38:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:38:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:38:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:38:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:38:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:38:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:38:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:38:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:38:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:38:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:38:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:38:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:38:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:38:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:38:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:38:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:38:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:38:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:38:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:38:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:38:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:38:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:38:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:38:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:38:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:38:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:38:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:38:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:38:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:38:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:38:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:38:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:38:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:38:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:38:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:38:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:38:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:38:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:38:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:38:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:38:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:38:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:38:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:38:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:38:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:38:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:38:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:38:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:38:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:38:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:38:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:38:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:38:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:38:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:38:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:38:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:38:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:38:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:38:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:38:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:38:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:38:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:38:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:38:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:38:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:38:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:38:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:38:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:38:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:38:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:38:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:38:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:38:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:38:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:38:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:38:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:38:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:38:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:38:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:38:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:38:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:38:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:38:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:38:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:38:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:38:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:38:46,428 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:38:46,428 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:38:46,428 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:38:46,428 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:38:46,428 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:38:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:38:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:38:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:38:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:38:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:38:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:38:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:38:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:38:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:38:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:38:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:38:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:38:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:38:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-21 19:38:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:38:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:38:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:38:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-10-21 19:38:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_first [2021-10-21 19:38:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:38:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:38:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:38:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-21 19:38:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:38:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:38:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:38:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:38:46,780 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:38:47,099 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:38:47,100 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:38:47,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:38:47 BoogieIcfgContainer [2021-10-21 19:38:47,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:38:47,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:38:47,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:38:47,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:38:47,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:38:45" (1/3) ... [2021-10-21 19:38:47,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30131034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:38:47, skipping insertion in model container [2021-10-21 19:38:47,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:38:46" (2/3) ... [2021-10-21 19:38:47,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30131034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:38:47, skipping insertion in model container [2021-10-21 19:38:47,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:38:47" (3/3) ... [2021-10-21 19:38:47,115 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2021-10-21 19:38:47,122 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:38:47,122 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-21 19:38:47,181 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:38:47,189 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:38:47,189 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-21 19:38:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 58 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:38:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:38:47,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:47,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:47,222 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash 692301555, now seen corresponding path program 1 times [2021-10-21 19:38:47,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:47,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590139504] [2021-10-21 19:38:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:47,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:47,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:47,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:47,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590139504] [2021-10-21 19:38:47,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590139504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:47,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:47,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:38:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262328700] [2021-10-21 19:38:47,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:38:47,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:38:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:38:47,666 INFO L87 Difference]: Start difference. First operand has 70 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 58 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2021-10-21 19:38:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:47,884 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-10-21 19:38:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:38:47,886 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 [2021-10-21 19:38:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:47,897 INFO L225 Difference]: With dead ends: 73 [2021-10-21 19:38:47,898 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 19:38:47,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:38:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 19:38:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-10-21 19:38:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:38:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-10-21 19:38:47,948 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 13 [2021-10-21 19:38:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:47,949 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-10-21 19:38:47,949 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) [2021-10-21 19:38:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-10-21 19:38:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:38:47,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:47,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:47,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:38:47,951 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:47,952 INFO L82 PathProgramCache]: Analyzing trace with hash 692301556, now seen corresponding path program 1 times [2021-10-21 19:38:47,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:47,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077251209] [2021-10-21 19:38:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:47,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:48,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:48,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:48,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077251209] [2021-10-21 19:38:48,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077251209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:48,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:48,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:38:48,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328189181] [2021-10-21 19:38:48,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:38:48,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:38:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:38:48,079 INFO L87 Difference]: Start difference. First operand 62 states and 63 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) [2021-10-21 19:38:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:48,297 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-10-21 19:38:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:38:48,298 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 [2021-10-21 19:38:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:48,304 INFO L225 Difference]: With dead ends: 65 [2021-10-21 19:38:48,305 INFO L226 Difference]: Without dead ends: 65 [2021-10-21 19:38:48,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:38:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-21 19:38:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-10-21 19:38:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 50 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:38:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-21 19:38:48,334 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 13 [2021-10-21 19:38:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:48,334 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-21 19:38:48,334 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) [2021-10-21 19:38:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-21 19:38:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:38:48,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:48,336 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:48,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:38:48,336 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash -44128920, now seen corresponding path program 1 times [2021-10-21 19:38:48,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:48,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252661113] [2021-10-21 19:38:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:48,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:48,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:48,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:48,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252661113] [2021-10-21 19:38:48,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252661113] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:48,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:48,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:38:48,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882874264] [2021-10-21 19:38:48,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:38:48,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:48,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:38:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:38:48,616 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:38:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:48,962 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-10-21 19:38:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:38:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-10-21 19:38:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:48,965 INFO L225 Difference]: With dead ends: 71 [2021-10-21 19:38:48,965 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 19:38:48,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:38:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 19:38:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-10-21 19:38:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 51 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:38:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-10-21 19:38:48,982 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 15 [2021-10-21 19:38:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:48,985 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-10-21 19:38:48,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:38:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-10-21 19:38:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:38:48,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:48,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:48,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:38:48,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1141220174, now seen corresponding path program 1 times [2021-10-21 19:38:48,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:48,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392483536] [2021-10-21 19:38:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:48,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:38:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:49,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:49,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392483536] [2021-10-21 19:38:49,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392483536] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:49,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:49,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:38:49,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991022824] [2021-10-21 19:38:49,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:38:49,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:38:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:38:49,214 INFO L87 Difference]: Start difference. First operand 61 states and 62 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) [2021-10-21 19:38:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:49,546 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-10-21 19:38:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:38:49,547 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 [2021-10-21 19:38:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:49,552 INFO L225 Difference]: With dead ends: 61 [2021-10-21 19:38:49,552 INFO L226 Difference]: Without dead ends: 61 [2021-10-21 19:38:49,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:38:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-21 19:38:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-10-21 19:38:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 50 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:38:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-21 19:38:49,572 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 19 [2021-10-21 19:38:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:49,573 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-21 19:38:49,573 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) [2021-10-21 19:38:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-21 19:38:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:38:49,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:49,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:49,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:38:49,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:49,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1141220173, now seen corresponding path program 1 times [2021-10-21 19:38:49,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:49,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536199940] [2021-10-21 19:38:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:49,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-21 19:38:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:49,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:49,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536199940] [2021-10-21 19:38:49,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536199940] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:49,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:49,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:38:49,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575016701] [2021-10-21 19:38:49,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:38:49,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:38:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:38:49,818 INFO L87 Difference]: Start difference. First operand 60 states and 61 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) [2021-10-21 19:38:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:50,098 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-10-21 19:38:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:38:50,099 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 [2021-10-21 19:38:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:50,100 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:38:50,100 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 19:38:50,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:38:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 19:38:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-10-21 19:38:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.457142857142857) internal successors, (51), 49 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:38:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-10-21 19:38:50,107 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 19 [2021-10-21 19:38:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:50,108 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-10-21 19:38:50,108 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) [2021-10-21 19:38:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-10-21 19:38:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:38:50,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:50,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:50,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:38:50,110 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:50,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:50,111 INFO L82 PathProgramCache]: Analyzing trace with hash 716638674, now seen corresponding path program 1 times [2021-10-21 19:38:50,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:50,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913011649] [2021-10-21 19:38:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:50,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:50,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:50,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:50,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:38:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:50,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:50,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913011649] [2021-10-21 19:38:50,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913011649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:50,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360825449] [2021-10-21 19:38:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:50,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:50,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:50,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:50,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:38:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:50,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:38:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:38:50,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360825449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:50,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:50,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-21 19:38:50,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500655415] [2021-10-21 19:38:50,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:38:50,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:38:50,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:38:50,750 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:38:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:51,068 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-10-21 19:38:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:38:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2021-10-21 19:38:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:51,070 INFO L225 Difference]: With dead ends: 73 [2021-10-21 19:38:51,070 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 19:38:51,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:38:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 19:38:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-10-21 19:38:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.4) internal successors, (56), 54 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:38:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-21 19:38:51,078 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 28 [2021-10-21 19:38:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:51,078 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-21 19:38:51,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:38:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-21 19:38:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-21 19:38:51,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:51,082 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:51,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:51,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:51,296 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1795776088, now seen corresponding path program 2 times [2021-10-21 19:38:51,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:51,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088448390] [2021-10-21 19:38:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:51,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:51,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:51,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:51,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:38:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:51,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:38:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:38:51,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:51,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088448390] [2021-10-21 19:38:51,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088448390] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:51,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:51,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:38:51,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765376700] [2021-10-21 19:38:51,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:38:51,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:51,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:38:51,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:38:51,520 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:38:51,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:51,702 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-10-21 19:38:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:38:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-10-21 19:38:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:51,705 INFO L225 Difference]: With dead ends: 68 [2021-10-21 19:38:51,705 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 19:38:51,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:38:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 19:38:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-21 19:38:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 55 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:38:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-10-21 19:38:51,712 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 41 [2021-10-21 19:38:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:51,713 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-10-21 19:38:51,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:38:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-10-21 19:38:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:38:51,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:51,715 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:51,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:38:51,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_remove_firstErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash 836136051, now seen corresponding path program 1 times [2021-10-21 19:38:51,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:51,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402696402] [2021-10-21 19:38:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:51,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:51,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:51,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:52,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:38:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:52,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:38:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:38:52,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:52,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402696402] [2021-10-21 19:38:52,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402696402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:52,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265569175] [2021-10-21 19:38:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:52,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:52,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:52,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:52,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:38:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:52,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:38:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:52,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:38:53,218 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:38:53,218 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 20 treesize of output 19 [2021-10-21 19:38:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:38:53,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265569175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:53,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:53,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-10-21 19:38:53,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441771049] [2021-10-21 19:38:53,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:38:53,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:38:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:38:53,252 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-21 19:38:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:54,450 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-10-21 19:38:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:38:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-10-21 19:38:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:54,452 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:38:54,452 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:38:54,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 773.5ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:38:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:38:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-10-21 19:38:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 65 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-21 19:38:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-10-21 19:38:54,461 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 43 [2021-10-21 19:38:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:54,462 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-10-21 19:38:54,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-21 19:38:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-10-21 19:38:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:38:54,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:54,472 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:54,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:54,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:54,673 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_remove_firstErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash 836136052, now seen corresponding path program 1 times [2021-10-21 19:38:54,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:54,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864098704] [2021-10-21 19:38:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:54,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:54,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:54,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:55,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:38:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:55,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:38:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:38:55,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:55,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864098704] [2021-10-21 19:38:55,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864098704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:55,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187966252] [2021-10-21 19:38:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:55,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:55,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:55,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:55,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:38:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:55,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:38:55,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:55,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:38:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-21 19:38:56,279 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:38:56,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-10-21 19:38:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:38:56,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187966252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:56,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:56,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-10-21 19:38:56,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167467694] [2021-10-21 19:38:56,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:38:56,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:38:56,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:38:56,513 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-21 19:38:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:57,538 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-10-21 19:38:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:38:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 43 [2021-10-21 19:38:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:57,541 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:38:57,541 INFO L226 Difference]: Without dead ends: 107 [2021-10-21 19:38:57,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:38:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-21 19:38:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2021-10-21 19:38:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 78 states have internal predecessors, (90), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-21 19:38:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-10-21 19:38:57,550 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 43 [2021-10-21 19:38:57,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:57,550 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-10-21 19:38:57,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-21 19:38:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-10-21 19:38:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:38:57,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:57,552 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:57,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:57,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:57,768 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash 150413864, now seen corresponding path program 1 times [2021-10-21 19:38:57,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:57,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644779645] [2021-10-21 19:38:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:57,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:57,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:57,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:57,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:38:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:57,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:38:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:38:58,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:58,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644779645] [2021-10-21 19:38:58,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644779645] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:58,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:58,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:38:58,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559436122] [2021-10-21 19:38:58,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:38:58,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:38:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:38:58,038 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:38:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:58,702 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2021-10-21 19:38:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:38:58,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-10-21 19:38:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:58,708 INFO L225 Difference]: With dead ends: 116 [2021-10-21 19:38:58,708 INFO L226 Difference]: Without dead ends: 116 [2021-10-21 19:38:58,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:38:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-21 19:38:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-10-21 19:38:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 82 states have internal predecessors, (98), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:38:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2021-10-21 19:38:58,725 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 44 [2021-10-21 19:38:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:58,732 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2021-10-21 19:38:58,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:38:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2021-10-21 19:38:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:38:58,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:58,734 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:58,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:38:58,734 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_remove_firstErr3REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash 150413865, now seen corresponding path program 1 times [2021-10-21 19:38:58,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:58,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225980216] [2021-10-21 19:38:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:58,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:58,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:59,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:38:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:59,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:38:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:38:59,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:59,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225980216] [2021-10-21 19:38:59,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225980216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:59,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:59,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:38:59,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661041689] [2021-10-21 19:38:59,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:38:59,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:59,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:38:59,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:38:59,123 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:38:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:59,890 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2021-10-21 19:38:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:38:59,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-10-21 19:38:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:59,893 INFO L225 Difference]: With dead ends: 119 [2021-10-21 19:38:59,893 INFO L226 Difference]: Without dead ends: 119 [2021-10-21 19:38:59,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:38:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-21 19:38:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-10-21 19:38:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.391304347826087) internal successors, (96), 82 states have internal predecessors, (96), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:38:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2021-10-21 19:38:59,901 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 44 [2021-10-21 19:38:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:59,902 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2021-10-21 19:38:59,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:38:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2021-10-21 19:38:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:38:59,904 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:59,904 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:59,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:38:59,905 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:38:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1328594296, now seen corresponding path program 1 times [2021-10-21 19:38:59,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:59,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881179019] [2021-10-21 19:38:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:59,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:59,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:00,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:00,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:39:00,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:00,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881179019] [2021-10-21 19:39:00,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881179019] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:00,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:00,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:39:00,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192858726] [2021-10-21 19:39:00,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:39:00,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:39:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:39:00,159 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:39:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:00,806 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2021-10-21 19:39:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:39:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-10-21 19:39:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:00,809 INFO L225 Difference]: With dead ends: 118 [2021-10-21 19:39:00,809 INFO L226 Difference]: Without dead ends: 118 [2021-10-21 19:39:00,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:39:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-21 19:39:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-21 19:39:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 88 states have internal predecessors, (103), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:39:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2021-10-21 19:39:00,840 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 47 [2021-10-21 19:39:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:00,840 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2021-10-21 19:39:00,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:39:00,841 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2021-10-21 19:39:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 19:39:00,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:00,842 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:00,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:39:00,843 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:00,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1763249655, now seen corresponding path program 1 times [2021-10-21 19:39:00,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:00,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421921483] [2021-10-21 19:39:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:00,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:00,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:01,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:01,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:39:01,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:01,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421921483] [2021-10-21 19:39:01,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421921483] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:01,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:01,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:39:01,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528412681] [2021-10-21 19:39:01,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:39:01,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:01,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:39:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:39:01,164 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:39:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:01,883 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2021-10-21 19:39:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:39:01,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-10-21 19:39:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:01,885 INFO L225 Difference]: With dead ends: 117 [2021-10-21 19:39:01,885 INFO L226 Difference]: Without dead ends: 117 [2021-10-21 19:39:01,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:39:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-21 19:39:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2021-10-21 19:39:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 90 states have internal predecessors, (105), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:39:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2021-10-21 19:39:01,892 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 48 [2021-10-21 19:39:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:01,893 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2021-10-21 19:39:01,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:39:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2021-10-21 19:39:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:39:01,894 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:01,894 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:01,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:39:01,895 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:01,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1173835674, now seen corresponding path program 1 times [2021-10-21 19:39:01,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:01,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373119401] [2021-10-21 19:39:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:01,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:01,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:01,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:01,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:02,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:39:02,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:02,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373119401] [2021-10-21 19:39:02,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373119401] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:02,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:02,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:39:02,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400497363] [2021-10-21 19:39:02,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:39:02,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:39:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:39:02,012 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:39:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:02,277 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2021-10-21 19:39:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:39:02,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-10-21 19:39:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:02,279 INFO L225 Difference]: With dead ends: 106 [2021-10-21 19:39:02,279 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 19:39:02,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:39:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 19:39:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-21 19:39:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 89 states have internal predecessors, (103), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:39:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-10-21 19:39:02,286 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 49 [2021-10-21 19:39:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:02,287 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-10-21 19:39:02,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:39:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-10-21 19:39:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:39:02,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:02,288 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:02,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:39:02,289 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_remove_firstErr9REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2029167660, now seen corresponding path program 1 times [2021-10-21 19:39:02,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:02,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129353291] [2021-10-21 19:39:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:02,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:02,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:02,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:02,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:02,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129353291] [2021-10-21 19:39:02,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129353291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:02,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051013484] [2021-10-21 19:39:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:02,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:02,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:02,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:02,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:39:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:39:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:03,464 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:39:03,464 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 [2021-10-21 19:39:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:39:03,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051013484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:03,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:39:03,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [21] total 27 [2021-10-21 19:39:03,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478746312] [2021-10-21 19:39:03,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:39:03,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:39:03,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:39:03,524 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:39:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:03,743 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2021-10-21 19:39:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:39:03,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-10-21 19:39:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:03,745 INFO L225 Difference]: With dead ends: 105 [2021-10-21 19:39:03,745 INFO L226 Difference]: Without dead ends: 105 [2021-10-21 19:39:03,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:39:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-21 19:39:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-10-21 19:39:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 88 states have internal predecessors, (101), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:39:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2021-10-21 19:39:03,757 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 50 [2021-10-21 19:39:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:03,758 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2021-10-21 19:39:03,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:39:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2021-10-21 19:39:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:39:03,766 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:03,766 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:03,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:03,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:39:03,992 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2020712695, now seen corresponding path program 1 times [2021-10-21 19:39:03,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:03,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003909998] [2021-10-21 19:39:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:03,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:39:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:39:04,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:04,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003909998] [2021-10-21 19:39:04,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003909998] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:04,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:04,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:39:04,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52140243] [2021-10-21 19:39:04,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:39:04,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:04,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:39:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:39:04,134 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:39:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:04,437 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-10-21 19:39:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:39:04,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-10-21 19:39:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:04,438 INFO L225 Difference]: With dead ends: 105 [2021-10-21 19:39:04,438 INFO L226 Difference]: Without dead ends: 105 [2021-10-21 19:39:04,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:39:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-21 19:39:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-10-21 19:39:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 87 states have internal predecessors, (97), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:39:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-10-21 19:39:04,445 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 55 [2021-10-21 19:39:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:04,446 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-10-21 19:39:04,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:39:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-10-21 19:39:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:39:04,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:04,447 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:04,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:39:04,448 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_remove_firstErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1148883491, now seen corresponding path program 2 times [2021-10-21 19:39:04,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:04,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943532598] [2021-10-21 19:39:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:04,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-21 19:39:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 19:39:04,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:04,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943532598] [2021-10-21 19:39:04,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943532598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:04,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091836245] [2021-10-21 19:39:04,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:39:04,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:04,624 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:04,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:39:04,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:39:04,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:39:04,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:39:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 19:39:05,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091836245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:05,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:05,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-10-21 19:39:05,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605903418] [2021-10-21 19:39:05,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:39:05,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:05,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:39:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:39:05,111 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:39:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:05,357 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-10-21 19:39:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:39:05,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 56 [2021-10-21 19:39:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:05,358 INFO L225 Difference]: With dead ends: 74 [2021-10-21 19:39:05,359 INFO L226 Difference]: Without dead ends: 65 [2021-10-21 19:39:05,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:39:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-21 19:39:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-21 19:39:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 53 states have internal predecessors, (54), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-21 19:39:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-21 19:39:05,364 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2021-10-21 19:39:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:05,365 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-21 19:39:05,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:39:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-21 19:39:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:39:05,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:05,366 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:05,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:05,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:39:05,577 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:05,577 INFO L82 PathProgramCache]: Analyzing trace with hash 793488505, now seen corresponding path program 1 times [2021-10-21 19:39:05,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:05,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958982406] [2021-10-21 19:39:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:05,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:05,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:05,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:06,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:06,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:39:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:06,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:06,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958982406] [2021-10-21 19:39:06,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958982406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:06,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408004447] [2021-10-21 19:39:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:06,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:06,804 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:06,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:39:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:07,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 82 conjunts are in the unsatisfiable core [2021-10-21 19:39:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:07,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:39:07,466 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:39:07,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-21 19:39:07,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:39:08,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-21 19:39:08,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:39:08,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 38 [2021-10-21 19:39:08,845 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-10-21 19:39:08,846 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 40 treesize of output 40 [2021-10-21 19:39:09,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:39:09,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-10-21 19:39:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:09,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408004447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:09,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:09,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 52 [2021-10-21 19:39:09,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512777485] [2021-10-21 19:39:09,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-21 19:39:09,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-21 19:39:09,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2021-10-21 19:39:09,326 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:39:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:12,645 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-10-21 19:39:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-21 19:39:12,646 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2021-10-21 19:39:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:12,647 INFO L225 Difference]: With dead ends: 83 [2021-10-21 19:39:12,647 INFO L226 Difference]: Without dead ends: 83 [2021-10-21 19:39:12,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 3896.3ms TimeCoverageRelationStatistics Valid=514, Invalid=5186, Unknown=0, NotChecked=0, Total=5700 [2021-10-21 19:39:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-21 19:39:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2021-10-21 19:39:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 8 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:39:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-10-21 19:39:12,655 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 58 [2021-10-21 19:39:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:12,655 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-10-21 19:39:12,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:39:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-10-21 19:39:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:39:12,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:12,657 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:12,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:12,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:39:12,857 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_remove_firstErr3REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:12,858 INFO L82 PathProgramCache]: Analyzing trace with hash 793488506, now seen corresponding path program 1 times [2021-10-21 19:39:12,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:12,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619136375] [2021-10-21 19:39:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:12,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:13,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:13,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:13,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:13,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:39:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:14,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:14,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619136375] [2021-10-21 19:39:14,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619136375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:14,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618142238] [2021-10-21 19:39:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:14,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:14,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:14,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:39:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-21 19:39:14,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:14,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:39:15,214 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-21 19:39:15,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2021-10-21 19:39:15,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-21 19:39:15,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-21 19:39:15,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:39:15,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2021-10-21 19:39:15,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-10-21 19:39:17,049 INFO L354 Elim1Store]: treesize reduction 85, result has 3.4 percent of original size [2021-10-21 19:39:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 75 [2021-10-21 19:39:17,067 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-10-21 19:39:17,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 63 [2021-10-21 19:39:17,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:39:17,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 47 [2021-10-21 19:39:17,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:39:17,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-10-21 19:39:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:17,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618142238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:17,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:17,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 58 [2021-10-21 19:39:17,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522081166] [2021-10-21 19:39:17,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-21 19:39:17,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-21 19:39:17,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3243, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 19:39:17,731 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-21 19:39:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:22,297 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-10-21 19:39:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-21 19:39:22,297 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 58 [2021-10-21 19:39:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:22,299 INFO L225 Difference]: With dead ends: 87 [2021-10-21 19:39:22,299 INFO L226 Difference]: Without dead ends: 87 [2021-10-21 19:39:22,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 5669.1ms TimeCoverageRelationStatistics Valid=666, Invalid=8076, Unknown=0, NotChecked=0, Total=8742 [2021-10-21 19:39:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-21 19:39:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-10-21 19:39:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 65 states have internal predecessors, (68), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:39:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-10-21 19:39:22,308 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 58 [2021-10-21 19:39:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:22,309 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-10-21 19:39:22,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-21 19:39:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-10-21 19:39:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 19:39:22,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:22,311 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:22,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:22,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:22,524 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash 579683577, now seen corresponding path program 1 times [2021-10-21 19:39:22,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:22,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359987102] [2021-10-21 19:39:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:22,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:22,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:22,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:22,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:22,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:22,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:39:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:39:22,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:22,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359987102] [2021-10-21 19:39:22,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359987102] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:22,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914385181] [2021-10-21 19:39:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:22,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:22,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:22,677 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:22,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:39:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:39:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:39:23,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914385181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:23,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:23,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-10-21 19:39:23,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38553809] [2021-10-21 19:39:23,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:39:23,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:23,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:39:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:39:23,288 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:39:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:23,457 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-10-21 19:39:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:39:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 57 [2021-10-21 19:39:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:23,459 INFO L225 Difference]: With dead ends: 79 [2021-10-21 19:39:23,459 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 19:39:23,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:39:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 19:39:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-21 19:39:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 65 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:39:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-10-21 19:39:23,465 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 57 [2021-10-21 19:39:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:23,466 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-10-21 19:39:23,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:39:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-10-21 19:39:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 19:39:23,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:23,467 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:23,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-21 19:39:23,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:23,672 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash 274459610, now seen corresponding path program 1 times [2021-10-21 19:39:23,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:23,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968131776] [2021-10-21 19:39:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:23,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:23,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:23,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:24,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:24,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:24,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:39:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:24,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:24,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968131776] [2021-10-21 19:39:24,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968131776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:24,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546601929] [2021-10-21 19:39:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:24,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:24,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:24,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:24,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:39:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-21 19:39:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:25,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-21 19:39:25,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:39:25,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:39:25,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-21 19:39:26,854 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_remove_first_~temp~1.base Int)) (let ((.cse0 (select |c_old(#memory_$Pointer$.base)| |c_sll_remove_first_#in~head.base|))) (and (<= sll_remove_first_~temp~1.base (select (select |c_old(#memory_$Pointer$.base)| (select .cse0 |c_sll_remove_first_#in~head.offset|)) 4)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_remove_first_#in~head.base| (store .cse0 |c_sll_remove_first_#in~head.offset| sll_remove_first_~temp~1.base)))))) is different from true [2021-10-21 19:39:26,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:39:26,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-10-21 19:39:27,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:39:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-10-21 19:39:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:27,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546601929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:27,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:27,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 43 [2021-10-21 19:39:27,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468922393] [2021-10-21 19:39:27,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-21 19:39:27,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-21 19:39:27,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1693, Unknown=1, NotChecked=82, Total=1892 [2021-10-21 19:39:27,198 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-21 19:39:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:32,168 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-10-21 19:39:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 19:39:32,169 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2021-10-21 19:39:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:32,170 INFO L225 Difference]: With dead ends: 81 [2021-10-21 19:39:32,170 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 19:39:32,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 6117.5ms TimeCoverageRelationStatistics Valid=449, Invalid=4523, Unknown=2, NotChecked=138, Total=5112 [2021-10-21 19:39:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 19:39:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-21 19:39:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 59 states have internal predecessors, (59), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:39:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-10-21 19:39:32,177 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 62 [2021-10-21 19:39:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:32,178 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-10-21 19:39:32,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-21 19:39:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-10-21 19:39:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-21 19:39:32,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:32,179 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:32,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:32,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:32,404 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1750291722, now seen corresponding path program 2 times [2021-10-21 19:39:32,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:32,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47768726] [2021-10-21 19:39:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:32,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:39:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-21 19:39:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:39:32,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:32,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47768726] [2021-10-21 19:39:32,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47768726] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:32,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:32,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:39:32,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331637677] [2021-10-21 19:39:32,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:39:32,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:39:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:39:32,566 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:39:32,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:32,765 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-10-21 19:39:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:39:32,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 72 [2021-10-21 19:39:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:32,769 INFO L225 Difference]: With dead ends: 56 [2021-10-21 19:39:32,769 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 19:39:32,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:39:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 19:39:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-21 19:39:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-21 19:39:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-10-21 19:39:32,773 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 72 [2021-10-21 19:39:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:32,773 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-10-21 19:39:32,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:39:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-10-21 19:39:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-21 19:39:32,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:32,775 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:32,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 19:39:32,779 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:39:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:32,779 INFO L82 PathProgramCache]: Analyzing trace with hash -359283128, now seen corresponding path program 2 times [2021-10-21 19:39:32,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:32,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424511891] [2021-10-21 19:39:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:32,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:39:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:39:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:39:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-21 19:39:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:39:36,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:36,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424511891] [2021-10-21 19:39:36,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424511891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:36,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906875619] [2021-10-21 19:39:36,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:39:36,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:36,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:36,933 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:36,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:39:37,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:39:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:39:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 139 conjunts are in the unsatisfiable core [2021-10-21 19:39:37,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:37,488 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:39:37,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-10-21 19:39:37,636 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-21 19:39:37,636 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 17 treesize of output 30 [2021-10-21 19:39:38,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:39:38,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:39:38,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-21 19:39:38,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-21 19:39:38,728 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-21 19:39:38,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-21 19:39:38,741 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-21 19:39:38,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-10-21 19:39:39,750 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:39:39,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2021-10-21 19:39:39,775 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:39:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2021-10-21 19:39:40,150 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-10-21 19:39:40,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 78 [2021-10-21 19:39:40,193 INFO L354 Elim1Store]: treesize reduction 66, result has 34.7 percent of original size [2021-10-21 19:39:40,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 109 [2021-10-21 19:39:42,185 INFO L354 Elim1Store]: treesize reduction 166, result has 14.0 percent of original size [2021-10-21 19:39:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 117 treesize of output 127 [2021-10-21 19:39:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:39:45,399 INFO L354 Elim1Store]: treesize reduction 170, result has 17.9 percent of original size [2021-10-21 19:39:45,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 214 treesize of output 156 [2021-10-21 19:39:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:39:45,417 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:39:45,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 143 [2021-10-21 19:39:45,467 INFO L354 Elim1Store]: treesize reduction 82, result has 22.6 percent of original size [2021-10-21 19:39:45,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 127 treesize of output 141 [2021-10-21 19:39:52,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:39:52,416 INFO L354 Elim1Store]: treesize reduction 198, result has 7.9 percent of original size [2021-10-21 19:39:52,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 206 treesize of output 166 [2021-10-21 19:39:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:39:52,459 INFO L354 Elim1Store]: treesize reduction 89, result has 11.0 percent of original size [2021-10-21 19:39:52,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 181 treesize of output 177 [2021-10-21 19:39:52,501 INFO L354 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2021-10-21 19:39:52,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 159 [2021-10-21 19:39:52,959 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-21 19:39:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 64 [2021-10-21 19:39:52,965 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:39:52,966 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 43 treesize of output 27 [2021-10-21 19:39:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:39:52,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906875619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:52,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:52,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 43] total 80 [2021-10-21 19:39:52,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551349896] [2021-10-21 19:39:52,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-21 19:39:52,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-21 19:39:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=6046, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 19:39:52,979 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-21 19:40:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:00,332 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-10-21 19:40:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:40:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 71 [2021-10-21 19:40:00,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:00,335 INFO L225 Difference]: With dead ends: 54 [2021-10-21 19:40:00,335 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:40:00,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 13202.2ms TimeCoverageRelationStatistics Valid=559, Invalid=10783, Unknown=0, NotChecked=0, Total=11342 [2021-10-21 19:40:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:40:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-21 19:40:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0) internal successors, (42), 42 states have internal predecessors, (42), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-21 19:40:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-21 19:40:00,345 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 71 [2021-10-21 19:40:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:00,346 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-21 19:40:00,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-21 19:40:00,346 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-21 19:40:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-21 19:40:00,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:40:00,348 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:40:00,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:40:00,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:00,560 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-21 19:40:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:40:00,561 INFO L82 PathProgramCache]: Analyzing trace with hash -359283063, now seen corresponding path program 1 times [2021-10-21 19:40:00,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:40:00,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051038310] [2021-10-21 19:40:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:00,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:40:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:00,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:40:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:00,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:40:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:40:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-21 19:40:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:01,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:40:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:02,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-21 19:40:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:40:02,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:40:02,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051038310] [2021-10-21 19:40:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051038310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:02,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779490211] [2021-10-21 19:40:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:40:02,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:40:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:40:02,746 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:40:02,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:40:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:40:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-21 19:40:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:40:04,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-10-21 19:40:05,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-21 19:40:05,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:40:05,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 56 [2021-10-21 19:40:05,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:40:05,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2021-10-21 19:40:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:40:06,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779490211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:06,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:06,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 61 [2021-10-21 19:40:06,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41919557] [2021-10-21 19:40:06,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-21 19:40:06,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-21 19:40:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3593, Unknown=0, NotChecked=0, Total=3782 [2021-10-21 19:40:06,452 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-10-21 19:40:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:40:09,445 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-10-21 19:40:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:40:09,446 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 71 [2021-10-21 19:40:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:40:09,447 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:40:09,447 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:40:09,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 4810.4ms TimeCoverageRelationStatistics Valid=354, Invalid=5966, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 19:40:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:40:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:40:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:40:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:40:09,450 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2021-10-21 19:40:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:40:09,451 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:40:09,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-10-21 19:40:09,451 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:40:09,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:40:09,453 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_createErr0REQUIRES_VIOLATION [2021-10-21 19:40:09,454 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_createErr1REQUIRES_VIOLATION [2021-10-21 19:40:09,454 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-21 19:40:09,454 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-21 19:40:09,454 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-21 19:40:09,455 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-21 19:40:09,455 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:40:09,455 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:40:09,455 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:40:09,456 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:40:09,456 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr0REQUIRES_VIOLATION [2021-10-21 19:40:09,456 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr1REQUIRES_VIOLATION [2021-10-21 19:40:09,456 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr2REQUIRES_VIOLATION [2021-10-21 19:40:09,456 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr3REQUIRES_VIOLATION [2021-10-21 19:40:09,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr4REQUIRES_VIOLATION [2021-10-21 19:40:09,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr5REQUIRES_VIOLATION [2021-10-21 19:40:09,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:40:09,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:40:09,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:40:09,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr9REQUIRES_VIOLATION [2021-10-21 19:40:09,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr10REQUIRES_VIOLATION [2021-10-21 19:40:09,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-21 19:40:09,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:40:09,670 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:40:09,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:40:09 BoogieIcfgContainer [2021-10-21 19:40:09,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:40:09,673 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:40:09,674 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:40:09,674 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:40:09,674 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:38:47" (3/4) ... [2021-10-21 19:40:09,678 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:40:09,685 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 19:40:09,686 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:40:09,686 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-21 19:40:09,686 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 19:40:09,687 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 19:40:09,687 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_create [2021-10-21 19:40:09,687 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:40:09,687 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_remove_first [2021-10-21 19:40:09,687 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-21 19:40:09,694 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-21 19:40:09,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-21 19:40:09,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:40:09,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:40:09,742 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:40:09,742 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:40:09,743 INFO L168 Benchmark]: Toolchain (without parser) took 84230.92 ms. Allocated memory was 104.9 MB in the beginning and 318.8 MB in the end (delta: 213.9 MB). Free memory was 73.6 MB in the beginning and 177.5 MB in the end (delta: -103.9 MB). Peak memory consumption was 108.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:09,744 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 104.9 MB. Free memory is still 58.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:40:09,744 INFO L168 Benchmark]: CACSL2BoogieTranslator took 631.73 ms. Allocated memory is still 104.9 MB. Free memory was 73.4 MB in the beginning and 70.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:09,745 INFO L168 Benchmark]: Boogie Preprocessor took 134.51 ms. Allocated memory is still 104.9 MB. Free memory was 70.9 MB in the beginning and 68.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:09,745 INFO L168 Benchmark]: RCFGBuilder took 804.93 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 68.2 MB in the beginning and 100.7 MB in the end (delta: -32.4 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:09,746 INFO L168 Benchmark]: TraceAbstraction took 82567.46 ms. Allocated memory was 125.8 MB in the beginning and 318.8 MB in the end (delta: 192.9 MB). Free memory was 100.0 MB in the beginning and 181.2 MB in the end (delta: -81.2 MB). Peak memory consumption was 112.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:09,746 INFO L168 Benchmark]: Witness Printer took 68.89 ms. Allocated memory is still 318.8 MB. Free memory was 181.2 MB in the beginning and 177.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:40:09,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 104.9 MB. Free memory is still 58.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 631.73 ms. Allocated memory is still 104.9 MB. Free memory was 73.4 MB in the beginning and 70.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 134.51 ms. Allocated memory is still 104.9 MB. Free memory was 70.9 MB in the beginning and 68.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 804.93 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 68.2 MB in the beginning and 100.7 MB in the end (delta: -32.4 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 82567.46 ms. Allocated memory was 125.8 MB in the beginning and 318.8 MB in the end (delta: 192.9 MB). Free memory was 100.0 MB in the beginning and 181.2 MB in the end (delta: -81.2 MB). Peak memory consumption was 112.6 MB. Max. memory is 16.1 GB. * Witness Printer took 68.89 ms. Allocated memory is still 318.8 MB. Free memory was 181.2 MB in the beginning and 177.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 609]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 597]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 595]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 82491.4ms, OverallIterations: 24, TraceHistogramMax: 3, EmptinessCheckTime: 55.1ms, AutomataDifference: 31685.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 904 SDtfs, 1887 SDslu, 5631 SDs, 0 SdLazy, 14037 SolverSat, 523 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 11359.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1300 GetRequests, 600 SyntacticMatches, 13 SemanticMatches, 687 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6963 ImplicationChecksByTransitivity, 38764.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=13, InterpolantAutomatonStates: 354, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 245.7ms AutomataMinimizationTime, 24 MinimizatonAttempts, 144 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 285.1ms SsaConstructionTime, 1006.3ms SatisfiabilityAnalysisTime, 43116.6ms InterpolantComputationTime, 1673 NumberOfCodeBlocks, 1673 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1638 ConstructedInterpolants, 114 QuantifiedInterpolants, 21724 SizeOfPredicates, 138 NumberOfNonLiveVariables, 3429 ConjunctsInSsa, 542 ConjunctsInUnsatCore, 35 InterpolantComputations, 14 PerfectInterpolantSequences, 358/605 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:40:09,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3652042-8d12-4a07-9689-e38cf5951a3b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...