./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/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_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:08:34,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:08:34,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:08:34,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:08:34,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:08:34,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:08:34,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:08:34,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:08:34,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:08:34,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:08:34,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:08:34,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:08:34,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:08:34,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:08:34,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:08:34,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:08:34,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:08:34,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:08:34,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:08:34,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:08:34,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:08:34,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:08:34,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:08:34,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:08:34,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:08:34,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:08:34,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:08:34,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:08:34,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:08:34,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:08:34,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:08:34,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:08:34,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:08:34,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:08:34,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:08:34,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:08:34,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:08:34,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:08:34,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:08:34,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:08:34,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:08:34,299 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-21 19:08:34,339 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:08:34,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:08:34,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:08:34,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:08:34,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:08:34,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:08:34,349 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:08:34,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:08:34,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:08:34,350 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:08:34,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:08:34,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:08:34,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:08:34,352 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:08:34,352 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:08:34,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:08:34,353 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:08:34,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:08:34,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:08:34,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:08:34,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:08:34,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:08:34,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:08:34,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:08:34,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:08:34,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:08:34,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:08:34,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:08:34,355 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_1074ca90-4e15-4d61-b825-046c618aae2c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 [2021-10-21 19:08:34,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:08:34,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:08:34,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:08:34,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:08:34,646 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:08:34,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-10-21 19:08:34,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/data/c81d6c08f/91c9f5d83f284a3cb59722893fcc477c/FLAG84e2e8e7d [2021-10-21 19:08:35,212 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:08:35,213 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-10-21 19:08:35,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/data/c81d6c08f/91c9f5d83f284a3cb59722893fcc477c/FLAG84e2e8e7d [2021-10-21 19:08:35,560 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/data/c81d6c08f/91c9f5d83f284a3cb59722893fcc477c [2021-10-21 19:08:35,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:08:35,565 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:08:35,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:08:35,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:08:35,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:08:35,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:08:35" (1/1) ... [2021-10-21 19:08:35,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b7cd57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:35, skipping insertion in model container [2021-10-21 19:08:35,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:08:35" (1/1) ... [2021-10-21 19:08:35,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:08:35,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:08:35,930 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_1074ca90-4e15-4d61-b825-046c618aae2c/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-10-21 19:08:35,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:08:35,945 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:08:36,037 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_1074ca90-4e15-4d61-b825-046c618aae2c/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-10-21 19:08:36,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:08:36,082 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:08:36,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36 WrapperNode [2021-10-21 19:08:36,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:08:36,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:08:36,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:08:36,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:08:36,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (1/1) ... [2021-10-21 19:08:36,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (1/1) ... [2021-10-21 19:08:36,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (1/1) ... [2021-10-21 19:08:36,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (1/1) ... [2021-10-21 19:08:36,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (1/1) ... [2021-10-21 19:08:36,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (1/1) ... [2021-10-21 19:08:36,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (1/1) ... [2021-10-21 19:08:36,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:08:36,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:08:36,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:08:36,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:08:36,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (1/1) ... [2021-10-21 19:08:36,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:08:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:36,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:08:36,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:08:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:08:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:08:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:08:36,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:08:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:08:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:08:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-10-21 19:08:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-10-21 19:08:36,293 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-10-21 19:08:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2021-10-21 19:08:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-10-21 19:08:36,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:08:36,294 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:08:36,294 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:08:36,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:08:36,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:08:36,295 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:08:36,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:08:36,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:08:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:08:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:08:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:08:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:08:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:08:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:08:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:08:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:08:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:08:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:08:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:08:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:08:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:08:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:08:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:08:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:08:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:08:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:08:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:08:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:08:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:08:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:08:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:08:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:08:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:08:36,301 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:08:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:08:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:08:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:08:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:08:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:08:36,302 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:08:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:08:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:08:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:08:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:08:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:08:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:08:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:08:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:08:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:08:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:08:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:08:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:08:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:08:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:08:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:08:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:08:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:08:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:08:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:08:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:08:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:08:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:08:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:08:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:08:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:08:36,307 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:08:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:08:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:08:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:08:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:08:36,308 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:08:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:08:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:08:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:08:36,309 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:08:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:08:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:08:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:08:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:08:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:08:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:08:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:08:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:08:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:08:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:08:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:08:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:08:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:08:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:08:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:08:36,313 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:08:36,313 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:08:36,313 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:08:36,313 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:08:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:08:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:08:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:08:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:08:36,314 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:08:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:08:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:08:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:08:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:08:36,315 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:08:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:08:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:08:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:08:36,316 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-10-21 19:08:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:08:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:08:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-10-21 19:08:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:08:36,317 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-10-21 19:08:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:08:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2021-10-21 19:08:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-10-21 19:08:36,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:08:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-21 19:08:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:08:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:08:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:08:36,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:08:36,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:08:36,590 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:08:36,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:08:36,904 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-21 19:08:36,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:08:36 BoogieIcfgContainer [2021-10-21 19:08:36,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:08:36,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:08:36,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:08:36,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:08:36,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:08:35" (1/3) ... [2021-10-21 19:08:36,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e08ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:08:36, skipping insertion in model container [2021-10-21 19:08:36,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:08:36" (2/3) ... [2021-10-21 19:08:36,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e08ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:08:36, skipping insertion in model container [2021-10-21 19:08:36,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:08:36" (3/3) ... [2021-10-21 19:08:36,923 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2021-10-21 19:08:36,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:08:36,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-10-21 19:08:36,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:08:36,997 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 19:08:36,997 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-10-21 19:08:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-21 19:08:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:08:37,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:37,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:37,026 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:37,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1660292181, now seen corresponding path program 1 times [2021-10-21 19:08:37,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:37,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701452495] [2021-10-21 19:08:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:37,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:37,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:37,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:37,241 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 19:08:37,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:37,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701452495] [2021-10-21 19:08:37,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701452495] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:37,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:37,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:08:37,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616882141] [2021-10-21 19:08:37,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:08:37,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:37,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:08:37,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:08:37,266 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 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 19:08:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:37,454 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-10-21 19:08:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:08:37,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 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 18 [2021-10-21 19:08:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:37,465 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:08:37,465 INFO L226 Difference]: Without dead ends: 117 [2021-10-21 19:08:37,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:08:37,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-21 19:08:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2021-10-21 19:08:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 83 states have internal predecessors, (92), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:08:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-10-21 19:08:37,510 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 18 [2021-10-21 19:08:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:37,510 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-10-21 19:08:37,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 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 19:08:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-10-21 19:08:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:08:37,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:37,513 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] [2021-10-21 19:08:37,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:08:37,513 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash -189324830, now seen corresponding path program 1 times [2021-10-21 19:08:37,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:37,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795539073] [2021-10-21 19:08:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:37,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:37,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:37,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:37,679 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 19:08:37,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:37,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795539073] [2021-10-21 19:08:37,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795539073] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:37,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:37,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:08:37,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683126819] [2021-10-21 19:08:37,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:08:37,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:37,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:08:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:08:37,683 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:08:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:37,958 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-10-21 19:08:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:08:37,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-21 19:08:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:37,964 INFO L225 Difference]: With dead ends: 116 [2021-10-21 19:08:37,965 INFO L226 Difference]: Without dead ends: 116 [2021-10-21 19:08:37,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:08:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-21 19:08:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-10-21 19:08:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 82 states have internal predecessors, (91), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:08:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-10-21 19:08:37,990 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 20 [2021-10-21 19:08:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:37,992 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-10-21 19:08:37,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:08:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-10-21 19:08:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:08:37,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:37,994 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] [2021-10-21 19:08:37,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:08:37,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:37,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:37,995 INFO L82 PathProgramCache]: Analyzing trace with hash -189324829, now seen corresponding path program 1 times [2021-10-21 19:08:37,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:37,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524833280] [2021-10-21 19:08:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:38,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:38,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:38,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:38,269 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 19:08:38,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:38,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524833280] [2021-10-21 19:08:38,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524833280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:38,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:38,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:08:38,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790314307] [2021-10-21 19:08:38,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:08:38,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:08:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:08:38,272 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 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 19:08:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:38,786 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2021-10-21 19:08:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:08:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 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 20 [2021-10-21 19:08:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:38,789 INFO L225 Difference]: With dead ends: 135 [2021-10-21 19:08:38,789 INFO L226 Difference]: Without dead ends: 135 [2021-10-21 19:08:38,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:08:38,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-21 19:08:38,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 107. [2021-10-21 19:08:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:08:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-10-21 19:08:38,798 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 20 [2021-10-21 19:08:38,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:38,799 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-10-21 19:08:38,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 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 19:08:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-10-21 19:08:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:08:38,800 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:38,800 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] [2021-10-21 19:08:38,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:08:38,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash -447490267, now seen corresponding path program 1 times [2021-10-21 19:08:38,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:38,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470792614] [2021-10-21 19:08:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:38,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:38,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:38,883 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 19:08:38,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:38,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470792614] [2021-10-21 19:08:38,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470792614] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:38,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:38,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:08:38,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894780347] [2021-10-21 19:08:38,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:08:38,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:08:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:08:38,885 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:08:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:39,069 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-10-21 19:08:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:08:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-21 19:08:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:39,073 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:08:39,073 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:08:39,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:08:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:08:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2021-10-21 19:08:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.507462686567164) internal successors, (101), 89 states have internal predecessors, (101), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:08:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2021-10-21 19:08:39,093 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 20 [2021-10-21 19:08:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:39,093 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2021-10-21 19:08:39,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:08:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2021-10-21 19:08:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:08:39,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:39,095 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:39,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:08:39,096 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2077322707, now seen corresponding path program 1 times [2021-10-21 19:08:39,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:39,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027835861] [2021-10-21 19:08:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:39,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:39,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:39,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:39,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-21 19:08:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:08:39,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:39,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027835861] [2021-10-21 19:08:39,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027835861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:39,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700116531] [2021-10-21 19:08:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:39,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:39,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:39,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:39,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:08:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:08:39,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:39,668 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 19:08:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:39,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700116531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:39,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:08:39,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-10-21 19:08:39,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460689925] [2021-10-21 19:08:39,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:08:39,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:08:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:08:39,928 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:08:40,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:40,087 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2021-10-21 19:08:40,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:08:40,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-10-21 19:08:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:40,090 INFO L225 Difference]: With dead ends: 135 [2021-10-21 19:08:40,090 INFO L226 Difference]: Without dead ends: 135 [2021-10-21 19:08:40,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:08:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-21 19:08:40,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2021-10-21 19:08:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 77 states have (on average 1.4805194805194806) internal successors, (114), 98 states have internal predecessors, (114), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:08:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-10-21 19:08:40,113 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 35 [2021-10-21 19:08:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:40,114 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-10-21 19:08:40,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:08:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-10-21 19:08:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:08:40,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:40,117 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:40,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:40,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:40,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2077322706, now seen corresponding path program 1 times [2021-10-21 19:08:40,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:40,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137226788] [2021-10-21 19:08:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:40,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:40,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:40,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-21 19:08:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:08:40,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:40,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137226788] [2021-10-21 19:08:40,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137226788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:40,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787754408] [2021-10-21 19:08:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:40,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:40,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:40,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:08:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:08:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:40,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787754408] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:40,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:08:40,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2021-10-21 19:08:40,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103668742] [2021-10-21 19:08:40,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:08:40,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:08:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:08:40,885 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:08:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:40,964 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2021-10-21 19:08:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:08:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-10-21 19:08:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:40,966 INFO L225 Difference]: With dead ends: 110 [2021-10-21 19:08:40,966 INFO L226 Difference]: Without dead ends: 107 [2021-10-21 19:08:40,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:08:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-21 19:08:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-21 19:08:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:08:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-10-21 19:08:40,972 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 35 [2021-10-21 19:08:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:40,973 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-10-21 19:08:40,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:08:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-10-21 19:08:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:08:40,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:40,974 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:41,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:41,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:41,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:41,176 INFO L82 PathProgramCache]: Analyzing trace with hash -646752834, now seen corresponding path program 1 times [2021-10-21 19:08:41,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:41,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579144679] [2021-10-21 19:08:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:41,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:41,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:41,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:41,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:41,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-10-21 19:08:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:08:41,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:41,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579144679] [2021-10-21 19:08:41,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579144679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:41,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:41,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:08:41,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792831760] [2021-10-21 19:08:41,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:08:41,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:41,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:08:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:08:41,351 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 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 19:08:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:41,826 INFO L93 Difference]: Finished difference Result 155 states and 177 transitions. [2021-10-21 19:08:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:08:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 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 40 [2021-10-21 19:08:41,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:41,829 INFO L225 Difference]: With dead ends: 155 [2021-10-21 19:08:41,829 INFO L226 Difference]: Without dead ends: 149 [2021-10-21 19:08:41,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:08:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-21 19:08:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-10-21 19:08:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 78 states have (on average 1.435897435897436) internal successors, (112), 99 states have internal predecessors, (112), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-21 19:08:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-10-21 19:08:41,844 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 40 [2021-10-21 19:08:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:41,844 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-10-21 19:08:41,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (5), 3 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 19:08:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-10-21 19:08:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:08:41,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:41,846 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:41,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:08:41,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash -646750912, now seen corresponding path program 1 times [2021-10-21 19:08:41,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:41,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079208399] [2021-10-21 19:08:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:41,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:41,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:41,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:41,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:42,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-10-21 19:08:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:08:42,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:42,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079208399] [2021-10-21 19:08:42,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079208399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:42,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661186880] [2021-10-21 19:08:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:42,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:42,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:42,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:42,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:08:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:08:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:42,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661186880] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:42,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:42,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-10-21 19:08:42,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058452860] [2021-10-21 19:08:42,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:08:42,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:42,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:08:42,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:08:42,402 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:08:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:43,386 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2021-10-21 19:08:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:08:43,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2021-10-21 19:08:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:43,388 INFO L225 Difference]: With dead ends: 172 [2021-10-21 19:08:43,388 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 19:08:43,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 563.8ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:08:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 19:08:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 122. [2021-10-21 19:08:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 104 states have internal predecessors, (117), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2021-10-21 19:08:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-10-21 19:08:43,396 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 40 [2021-10-21 19:08:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:43,396 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-10-21 19:08:43,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:08:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-10-21 19:08:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:08:43,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:43,398 INFO L512 BasicCegarLoop]: trace histogram [3, 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 19:08:43,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:43,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:43,624 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash -417387441, now seen corresponding path program 2 times [2021-10-21 19:08:43,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:43,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647843276] [2021-10-21 19:08:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:43,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:43,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:43,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:43,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:43,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:08:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:08:43,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:43,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647843276] [2021-10-21 19:08:43,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647843276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:43,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493185340] [2021-10-21 19:08:43,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:08:43,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:43,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:43,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:43,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:08:44,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:08:44,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:08:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:08:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:08:44,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493185340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:44,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:44,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-10-21 19:08:44,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365430048] [2021-10-21 19:08:44,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:08:44,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:08:44,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:08:44,279 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:08:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:46,045 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2021-10-21 19:08:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:08:46,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-10-21 19:08:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:46,047 INFO L225 Difference]: With dead ends: 179 [2021-10-21 19:08:46,047 INFO L226 Difference]: Without dead ends: 179 [2021-10-21 19:08:46,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1271.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:08:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-21 19:08:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 128. [2021-10-21 19:08:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.4090909090909092) internal successors, (124), 110 states have internal predecessors, (124), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-21 19:08:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2021-10-21 19:08:46,056 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 45 [2021-10-21 19:08:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:46,056 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2021-10-21 19:08:46,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:08:46,057 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2021-10-21 19:08:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:08:46,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:46,058 INFO L512 BasicCegarLoop]: trace histogram [3, 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 19:08:46,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:46,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-21 19:08:46,276 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:46,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash -24360431, now seen corresponding path program 1 times [2021-10-21 19:08:46,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:46,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952325568] [2021-10-21 19:08:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:46,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:46,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:46,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:46,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:46,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:08:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:08:46,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:46,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952325568] [2021-10-21 19:08:46,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952325568] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:46,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593075729] [2021-10-21 19:08:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:46,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:46,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:46,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:08:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:08:46,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:46,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:08:46,808 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 19:08:47,261 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:08:47,262 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 4 case distinctions, treesize of input 25 treesize of output 31 [2021-10-21 19:08:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:47,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593075729] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:47,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:47,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-10-21 19:08:47,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799515769] [2021-10-21 19:08:47,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:08:47,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:47,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:08:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:08:47,699 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:08:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:48,616 INFO L93 Difference]: Finished difference Result 242 states and 275 transitions. [2021-10-21 19:08:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:08:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2021-10-21 19:08:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:48,618 INFO L225 Difference]: With dead ends: 242 [2021-10-21 19:08:48,619 INFO L226 Difference]: Without dead ends: 242 [2021-10-21 19:08:48,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:08:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-21 19:08:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2021-10-21 19:08:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.4233576642335766) internal successors, (195), 160 states have internal predecessors, (195), 12 states have call successors, (12), 10 states have call predecessors, (12), 14 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-21 19:08:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2021-10-21 19:08:48,627 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 45 [2021-10-21 19:08:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:48,627 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2021-10-21 19:08:48,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:08:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2021-10-21 19:08:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:08:48,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:48,629 INFO L512 BasicCegarLoop]: trace histogram [3, 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 19:08:48,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-21 19:08:48,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:08:48,844 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:48,844 INFO L82 PathProgramCache]: Analyzing trace with hash -24360430, now seen corresponding path program 1 times [2021-10-21 19:08:48,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:48,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468907742] [2021-10-21 19:08:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:48,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:48,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:48,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:48,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:49,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:08:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:08:49,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:49,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468907742] [2021-10-21 19:08:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468907742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:49,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944638152] [2021-10-21 19:08:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:49,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:49,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:49,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:49,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:08:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:49,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:08:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:49,452 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 19:08:49,457 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 19:08:49,489 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 14 treesize of output 12 [2021-10-21 19:08:49,496 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 19:08:49,818 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:08:49,818 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 30 treesize of output 34 [2021-10-21 19:08:49,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:49,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-10-21 19:08:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:50,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944638152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:50,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:50,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-10-21 19:08:50,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788646365] [2021-10-21 19:08:50,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:08:50,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:08:50,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:08:50,218 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:08:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:51,187 INFO L93 Difference]: Finished difference Result 255 states and 287 transitions. [2021-10-21 19:08:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:08:51,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2021-10-21 19:08:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:51,190 INFO L225 Difference]: With dead ends: 255 [2021-10-21 19:08:51,190 INFO L226 Difference]: Without dead ends: 255 [2021-10-21 19:08:51,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:08:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-21 19:08:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 196. [2021-10-21 19:08:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 146 states have (on average 1.417808219178082) internal successors, (207), 169 states have internal predecessors, (207), 13 states have call successors, (13), 11 states have call predecessors, (13), 15 states have return successors, (19), 15 states have call predecessors, (19), 12 states have call successors, (19) [2021-10-21 19:08:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2021-10-21 19:08:51,207 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 45 [2021-10-21 19:08:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:51,208 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2021-10-21 19:08:51,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.461538461538462) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:08:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2021-10-21 19:08:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:08:51,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:51,211 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-10-21 19:08:51,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:51,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:51,432 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash -325262371, now seen corresponding path program 1 times [2021-10-21 19:08:51,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:51,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134267838] [2021-10-21 19:08:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:51,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:51,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:51,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:51,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:51,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:08:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:08:51,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:51,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134267838] [2021-10-21 19:08:51,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134267838] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:51,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:51,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 19:08:51,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859359094] [2021-10-21 19:08:51,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:08:51,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:08:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:08:51,603 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:08:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:52,232 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2021-10-21 19:08:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:08:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-10-21 19:08:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:52,235 INFO L225 Difference]: With dead ends: 267 [2021-10-21 19:08:52,235 INFO L226 Difference]: Without dead ends: 267 [2021-10-21 19:08:52,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:08:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-21 19:08:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 226. [2021-10-21 19:08:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.447674418604651) internal successors, (249), 197 states have internal predecessors, (249), 15 states have call successors, (15), 13 states have call predecessors, (15), 17 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-10-21 19:08:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 285 transitions. [2021-10-21 19:08:52,253 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 285 transitions. Word has length 49 [2021-10-21 19:08:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:52,255 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 285 transitions. [2021-10-21 19:08:52,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:08:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 285 transitions. [2021-10-21 19:08:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:08:52,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:52,256 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-10-21 19:08:52,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:08:52,256 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash -325262370, now seen corresponding path program 1 times [2021-10-21 19:08:52,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:52,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063734061] [2021-10-21 19:08:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:52,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:52,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:52,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:52,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:52,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:08:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:08:52,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:52,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063734061] [2021-10-21 19:08:52,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063734061] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:08:52,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:08:52,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 19:08:52,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723416845] [2021-10-21 19:08:52,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:08:52,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:08:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:08:52,479 INFO L87 Difference]: Start difference. First operand 226 states and 285 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:08:53,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:53,148 INFO L93 Difference]: Finished difference Result 268 states and 333 transitions. [2021-10-21 19:08:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:08:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-10-21 19:08:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:53,150 INFO L225 Difference]: With dead ends: 268 [2021-10-21 19:08:53,150 INFO L226 Difference]: Without dead ends: 268 [2021-10-21 19:08:53,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:08:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-21 19:08:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 226. [2021-10-21 19:08:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 172 states have (on average 1.436046511627907) internal successors, (247), 197 states have internal predecessors, (247), 15 states have call successors, (15), 13 states have call predecessors, (15), 17 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-10-21 19:08:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2021-10-21 19:08:53,161 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 49 [2021-10-21 19:08:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:53,162 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2021-10-21 19:08:53,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:08:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2021-10-21 19:08:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:08:53,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:53,163 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:08:53,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:08:53,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash 411208802, now seen corresponding path program 2 times [2021-10-21 19:08:53,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:53,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117320717] [2021-10-21 19:08:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:53,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:53,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:53,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:53,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-10-21 19:08:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:08:53,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:53,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117320717] [2021-10-21 19:08:53,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117320717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:53,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284897195] [2021-10-21 19:08:53,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:08:53,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:53,345 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:53,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:08:53,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:08:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:08:53,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:08:53,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:53,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284897195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:53,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:53,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-10-21 19:08:53,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504079977] [2021-10-21 19:08:53,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:08:53,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:53,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:08:53,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:08:53,838 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:08:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:54,742 INFO L93 Difference]: Finished difference Result 284 states and 360 transitions. [2021-10-21 19:08:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:08:54,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-10-21 19:08:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:54,745 INFO L225 Difference]: With dead ends: 284 [2021-10-21 19:08:54,745 INFO L226 Difference]: Without dead ends: 284 [2021-10-21 19:08:54,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 476.9ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:08:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-21 19:08:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 232. [2021-10-21 19:08:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 176 states have (on average 1.4318181818181819) internal successors, (252), 202 states have internal predecessors, (252), 16 states have call successors, (16), 13 states have call predecessors, (16), 18 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2021-10-21 19:08:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2021-10-21 19:08:54,757 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 50 [2021-10-21 19:08:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:54,757 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2021-10-21 19:08:54,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-21 19:08:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2021-10-21 19:08:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-21 19:08:54,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:54,759 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-10-21 19:08:54,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:54,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:54,972 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash -445053959, now seen corresponding path program 1 times [2021-10-21 19:08:54,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:54,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968883426] [2021-10-21 19:08:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:54,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:55,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:55,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:55,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:55,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:08:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:08:55,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:55,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968883426] [2021-10-21 19:08:55,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968883426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:55,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884491071] [2021-10-21 19:08:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:55,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:55,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:55,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:55,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:08:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:55,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:08:55,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:55,605 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 19:08:55,638 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:08:55,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-21 19:08:55,695 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 19:08:56,141 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 44 treesize of output 36 [2021-10-21 19:08:56,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:08:56,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2021-10-21 19:08:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:08:56,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884491071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:56,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:08:56,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-10-21 19:08:56,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311279386] [2021-10-21 19:08:56,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 19:08:56,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:08:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 19:08:56,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:08:56,371 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:08:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:08:58,050 INFO L93 Difference]: Finished difference Result 365 states and 449 transitions. [2021-10-21 19:08:58,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:08:58,050 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-10-21 19:08:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:08:58,052 INFO L225 Difference]: With dead ends: 365 [2021-10-21 19:08:58,053 INFO L226 Difference]: Without dead ends: 365 [2021-10-21 19:08:58,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 934.5ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:08:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-10-21 19:08:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 254. [2021-10-21 19:08:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.4329896907216495) internal successors, (278), 222 states have internal predecessors, (278), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-21 19:08:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 321 transitions. [2021-10-21 19:08:58,066 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 321 transitions. Word has length 52 [2021-10-21 19:08:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:08:58,066 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 321 transitions. [2021-10-21 19:08:58,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:08:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 321 transitions. [2021-10-21 19:08:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-21 19:08:58,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:08:58,068 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-10-21 19:08:58,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:08:58,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:58,281 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:08:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:08:58,281 INFO L82 PathProgramCache]: Analyzing trace with hash -445053958, now seen corresponding path program 1 times [2021-10-21 19:08:58,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:08:58,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114070849] [2021-10-21 19:08:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:58,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:08:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:58,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:08:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:58,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:08:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:58,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:08:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:58,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:08:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:08:58,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:08:58,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114070849] [2021-10-21 19:08:58,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114070849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:08:58,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573780306] [2021-10-21 19:08:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:08:58,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:08:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:08:58,575 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:08:58,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:08:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:08:58,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-21 19:08:58,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:08:58,912 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 19:08:59,040 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:08:59,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-10-21 19:08:59,062 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:08:59,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:08:59,131 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 19:08:59,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:09:00,142 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-10-21 19:09:00,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 62 [2021-10-21 19:09:00,154 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-21 19:09:00,155 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 53 treesize of output 39 [2021-10-21 19:09:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:00,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573780306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:00,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:00,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2021-10-21 19:09:00,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127575590] [2021-10-21 19:09:00,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 19:09:00,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:09:00,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:09:00,326 INFO L87 Difference]: Start difference. First operand 254 states and 321 transitions. Second operand has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:09:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:03,985 INFO L93 Difference]: Finished difference Result 355 states and 429 transitions. [2021-10-21 19:09:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:09:03,986 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-10-21 19:09:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:03,988 INFO L225 Difference]: With dead ends: 355 [2021-10-21 19:09:03,989 INFO L226 Difference]: Without dead ends: 355 [2021-10-21 19:09:03,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1856.9ms TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 19:09:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-10-21 19:09:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 254. [2021-10-21 19:09:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.422680412371134) internal successors, (276), 222 states have internal predecessors, (276), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-21 19:09:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 319 transitions. [2021-10-21 19:09:04,009 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 319 transitions. Word has length 52 [2021-10-21 19:09:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:04,009 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 319 transitions. [2021-10-21 19:09:04,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:09:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 319 transitions. [2021-10-21 19:09:04,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 19:09:04,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:04,011 INFO L512 BasicCegarLoop]: trace histogram [3, 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 19:09:04,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:04,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:04,231 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:09:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash 235136172, now seen corresponding path program 1 times [2021-10-21 19:09:04,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:04,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559684488] [2021-10-21 19:09:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:04,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:09:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:09:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:09:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-21 19:09:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:09:04,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:04,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559684488] [2021-10-21 19:09:04,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559684488] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:09:04,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:09:04,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-21 19:09:04,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2302083] [2021-10-21 19:09:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:09:04,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:09:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:09:04,387 INFO L87 Difference]: Start difference. First operand 254 states and 319 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:09:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:04,846 INFO L93 Difference]: Finished difference Result 304 states and 375 transitions. [2021-10-21 19:09:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:09:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2021-10-21 19:09:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:04,849 INFO L225 Difference]: With dead ends: 304 [2021-10-21 19:09:04,849 INFO L226 Difference]: Without dead ends: 298 [2021-10-21 19:09:04,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:09:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-21 19:09:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 254. [2021-10-21 19:09:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.4123711340206186) internal successors, (274), 222 states have internal predecessors, (274), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-21 19:09:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 317 transitions. [2021-10-21 19:09:04,861 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 317 transitions. Word has length 54 [2021-10-21 19:09:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:04,861 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 317 transitions. [2021-10-21 19:09:04,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:09:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 317 transitions. [2021-10-21 19:09:04,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:09:04,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:04,863 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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 19:09:04,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:09:04,863 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:09:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:04,864 INFO L82 PathProgramCache]: Analyzing trace with hash 916653259, now seen corresponding path program 1 times [2021-10-21 19:09:04,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:04,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987927698] [2021-10-21 19:09:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:04,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:09:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-21 19:09:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:09:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:09:04,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:04,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987927698] [2021-10-21 19:09:04,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987927698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:04,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770482510] [2021-10-21 19:09:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:04,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:04,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:04,998 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:05,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:09:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:05,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:09:05,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 19:09:05,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770482510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:05,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:05,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-10-21 19:09:05,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804735197] [2021-10-21 19:09:05,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:09:05,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:09:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:09:05,580 INFO L87 Difference]: Start difference. First operand 254 states and 317 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-21 19:09:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:06,691 INFO L93 Difference]: Finished difference Result 391 states and 498 transitions. [2021-10-21 19:09:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:09:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-10-21 19:09:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:06,694 INFO L225 Difference]: With dead ends: 391 [2021-10-21 19:09:06,695 INFO L226 Difference]: Without dead ends: 381 [2021-10-21 19:09:06,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 836.7ms TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:09:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-10-21 19:09:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 256. [2021-10-21 19:09:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 224 states have internal predecessors, (276), 18 states have call successors, (18), 15 states have call predecessors, (18), 20 states have return successors, (25), 16 states have call predecessors, (25), 17 states have call successors, (25) [2021-10-21 19:09:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 319 transitions. [2021-10-21 19:09:06,709 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 319 transitions. Word has length 53 [2021-10-21 19:09:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:06,709 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 319 transitions. [2021-10-21 19:09:06,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-21 19:09:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 319 transitions. [2021-10-21 19:09:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:09:06,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:06,711 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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 19:09:06,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:06,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:09:06,924 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:09:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash 668506765, now seen corresponding path program 1 times [2021-10-21 19:09:06,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:06,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608128770] [2021-10-21 19:09:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:06,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:06,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:06,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:09:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:07,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-21 19:09:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:07,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:09:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 19:09:07,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:07,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608128770] [2021-10-21 19:09:07,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608128770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:07,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815213027] [2021-10-21 19:09:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:07,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:07,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:07,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:09:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:08,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:09:08,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:08,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:09:08,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-21 19:09:08,581 INFO L354 Elim1Store]: treesize reduction 97, result has 17.1 percent of original size [2021-10-21 19:09:08,581 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 5 case distinctions, treesize of input 28 treesize of output 36 [2021-10-21 19:09:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:09:08,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815213027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:08,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:08,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2021-10-21 19:09:08,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792861064] [2021-10-21 19:09:08,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:09:08,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:08,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:09:08,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:09:08,965 INFO L87 Difference]: Start difference. First operand 256 states and 319 transitions. Second operand has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:09:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:10,723 INFO L93 Difference]: Finished difference Result 404 states and 496 transitions. [2021-10-21 19:09:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:09:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2021-10-21 19:09:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:10,726 INFO L225 Difference]: With dead ends: 404 [2021-10-21 19:09:10,727 INFO L226 Difference]: Without dead ends: 404 [2021-10-21 19:09:10,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 886.7ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:09:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-10-21 19:09:10,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 326. [2021-10-21 19:09:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 256 states have (on average 1.41796875) internal successors, (363), 286 states have internal predecessors, (363), 22 states have call successors, (22), 18 states have call predecessors, (22), 26 states have return successors, (33), 21 states have call predecessors, (33), 21 states have call successors, (33) [2021-10-21 19:09:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 418 transitions. [2021-10-21 19:09:10,741 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 418 transitions. Word has length 53 [2021-10-21 19:09:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:10,742 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 418 transitions. [2021-10-21 19:09:10,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:09:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 418 transitions. [2021-10-21 19:09:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:09:10,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:10,743 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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 19:09:10,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:10,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:10,960 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:09:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:10,961 INFO L82 PathProgramCache]: Analyzing trace with hash 668506766, now seen corresponding path program 1 times [2021-10-21 19:09:10,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:10,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317129054] [2021-10-21 19:09:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:10,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:11,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:11,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:09:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:11,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-21 19:09:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:11,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:09:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 19:09:11,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:11,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317129054] [2021-10-21 19:09:11,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317129054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:11,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597879236] [2021-10-21 19:09:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:11,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:11,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:11,505 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:11,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:09:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:11,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:09:11,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:11,931 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 19:09:11,967 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 19:09:14,171 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (< sll_create_~new_head~0.base |c_#StackHeapBarrier|) (exists ((v_sll_create_~new_head~0.base_12 Int) (v_sll_create_~new_head~0.base_13 Int)) (and (< v_sll_create_~new_head~0.base_12 |c_#StackHeapBarrier|) (= |c_#length| (store (store (store |c_old(#length)| v_sll_create_~new_head~0.base_12 4) v_sll_create_~new_head~0.base_13 4) sll_create_~new_head~0.base 4)))))) is different from true [2021-10-21 19:09:14,491 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-10-21 19:09:14,492 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 3 case distinctions, treesize of input 28 treesize of output 34 [2021-10-21 19:09:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2021-10-21 19:09:14,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597879236] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:14,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:14,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-10-21 19:09:14,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776777622] [2021-10-21 19:09:14,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:09:14,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:14,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:09:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=243, Unknown=1, NotChecked=32, Total=342 [2021-10-21 19:09:14,854 INFO L87 Difference]: Start difference. First operand 326 states and 418 transitions. Second operand has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:09:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:16,447 INFO L93 Difference]: Finished difference Result 409 states and 496 transitions. [2021-10-21 19:09:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:09:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2021-10-21 19:09:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:16,452 INFO L225 Difference]: With dead ends: 409 [2021-10-21 19:09:16,452 INFO L226 Difference]: Without dead ends: 409 [2021-10-21 19:09:16,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2926.1ms TimeCoverageRelationStatistics Valid=144, Invalid=615, Unknown=1, NotChecked=52, Total=812 [2021-10-21 19:09:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-10-21 19:09:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 264. [2021-10-21 19:09:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 203 states have (on average 1.3990147783251232) internal successors, (284), 232 states have internal predecessors, (284), 18 states have call successors, (18), 15 states have call predecessors, (18), 21 states have return successors, (26), 16 states have call predecessors, (26), 17 states have call successors, (26) [2021-10-21 19:09:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 328 transitions. [2021-10-21 19:09:16,470 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 328 transitions. Word has length 53 [2021-10-21 19:09:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:16,471 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 328 transitions. [2021-10-21 19:09:16,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.3125) internal successors, (69), 17 states have internal predecessors, (69), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 19:09:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 328 transitions. [2021-10-21 19:09:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:09:16,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:16,473 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:09:16,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:16,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:16,696 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:09:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash -38429091, now seen corresponding path program 2 times [2021-10-21 19:09:16,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:16,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533480678] [2021-10-21 19:09:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:16,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:16,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:09:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:09:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:17,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:09:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:09:17,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:17,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533480678] [2021-10-21 19:09:17,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533480678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:17,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370305649] [2021-10-21 19:09:17,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:09:17,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:17,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:17,128 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:17,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:09:17,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:09:17,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:09:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-21 19:09:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:17,652 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 19:09:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:09:17,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:09:17,828 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:09:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:09:17,909 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:09:17,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-21 19:09:17,920 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-21 19:09:17,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-21 19:09:19,199 INFO L354 Elim1Store]: treesize reduction 97, result has 24.8 percent of original size [2021-10-21 19:09:19,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 98 [2021-10-21 19:09:19,235 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-10-21 19:09:19,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 53 [2021-10-21 19:09:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:19,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370305649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:19,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:19,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-10-21 19:09:19,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075817440] [2021-10-21 19:09:19,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:09:19,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:09:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:09:19,264 INFO L87 Difference]: Start difference. First operand 264 states and 328 transitions. Second operand has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:09:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:09:27,933 INFO L93 Difference]: Finished difference Result 377 states and 456 transitions. [2021-10-21 19:09:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 19:09:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2021-10-21 19:09:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:09:27,936 INFO L225 Difference]: With dead ends: 377 [2021-10-21 19:09:27,936 INFO L226 Difference]: Without dead ends: 377 [2021-10-21 19:09:27,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1814.8ms TimeCoverageRelationStatistics Valid=249, Invalid=2507, Unknown=0, NotChecked=0, Total=2756 [2021-10-21 19:09:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-10-21 19:09:27,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 307. [2021-10-21 19:09:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 239 states have (on average 1.3765690376569037) internal successors, (329), 270 states have internal predecessors, (329), 21 states have call successors, (21), 17 states have call predecessors, (21), 25 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-10-21 19:09:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 382 transitions. [2021-10-21 19:09:27,972 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 382 transitions. Word has length 55 [2021-10-21 19:09:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:09:27,972 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 382 transitions. [2021-10-21 19:09:27,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 29 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:09:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 382 transitions. [2021-10-21 19:09:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 19:09:27,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:09:27,974 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:09:28,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:09:28,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:09:28,192 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:09:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash 159610384, now seen corresponding path program 1 times [2021-10-21 19:09:28,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:28,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868400968] [2021-10-21 19:09:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:28,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:28,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:09:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:28,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:09:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:28,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:09:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:09:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-21 19:09:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:09:28,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:28,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868400968] [2021-10-21 19:09:28,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868400968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:28,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615396551] [2021-10-21 19:09:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:28,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:09:28,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:28,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:09:28,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:09:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:28,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:09:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:09:28,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 19:09:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-10-21 19:09:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:31,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615396551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:09:31,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:09:31,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-10-21 19:09:31,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608080814] [2021-10-21 19:09:31,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:09:31,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:09:31,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2021-10-21 19:09:31,701 INFO L87 Difference]: Start difference. First operand 307 states and 382 transitions. Second operand has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:11:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:06,606 INFO L93 Difference]: Finished difference Result 433 states and 522 transitions. [2021-10-21 19:11:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:11:06,606 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2021-10-21 19:11:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:06,608 INFO L225 Difference]: With dead ends: 433 [2021-10-21 19:11:06,608 INFO L226 Difference]: Without dead ends: 424 [2021-10-21 19:11:06,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 9214.6ms TimeCoverageRelationStatistics Valid=286, Invalid=2160, Unknown=4, NotChecked=0, Total=2450 [2021-10-21 19:11:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-10-21 19:11:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 307. [2021-10-21 19:11:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 239 states have (on average 1.3640167364016735) internal successors, (326), 270 states have internal predecessors, (326), 21 states have call successors, (21), 17 states have call predecessors, (21), 25 states have return successors, (32), 19 states have call predecessors, (32), 20 states have call successors, (32) [2021-10-21 19:11:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2021-10-21 19:11:06,622 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 57 [2021-10-21 19:11:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:06,622 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2021-10-21 19:11:06,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:11:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2021-10-21 19:11:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:11:06,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:06,624 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 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 19:11:06,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:06,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:11:06,840 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash 906045798, now seen corresponding path program 2 times [2021-10-21 19:11:06,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:06,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029019989] [2021-10-21 19:11:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:06,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:06,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:06,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:06,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-21 19:11:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:07,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-21 19:11:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:11:07,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:07,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029019989] [2021-10-21 19:11:07,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029019989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:07,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791647475] [2021-10-21 19:11:07,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:07,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:07,080 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:07,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:11:07,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:07,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:11:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:07,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791647475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:07,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:07,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 20 [2021-10-21 19:11:07,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214100644] [2021-10-21 19:11:07,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:11:07,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:11:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:11:07,791 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:11:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:08,747 INFO L93 Difference]: Finished difference Result 443 states and 577 transitions. [2021-10-21 19:11:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:11:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 58 [2021-10-21 19:11:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:08,759 INFO L225 Difference]: With dead ends: 443 [2021-10-21 19:11:08,759 INFO L226 Difference]: Without dead ends: 443 [2021-10-21 19:11:08,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 558.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:11:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-10-21 19:11:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 313. [2021-10-21 19:11:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 243 states have (on average 1.3621399176954732) internal successors, (331), 275 states have internal predecessors, (331), 22 states have call successors, (22), 17 states have call predecessors, (22), 26 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2021-10-21 19:11:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 388 transitions. [2021-10-21 19:11:08,775 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 388 transitions. Word has length 58 [2021-10-21 19:11:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:08,775 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 388 transitions. [2021-10-21 19:11:08,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 17 states have internal predecessors, (68), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:11:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 388 transitions. [2021-10-21 19:11:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:11:08,777 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:08,777 INFO L512 BasicCegarLoop]: trace histogram [3, 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 19:11:08,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:09,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:11:09,000 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:09,000 INFO L82 PathProgramCache]: Analyzing trace with hash 733723180, now seen corresponding path program 2 times [2021-10-21 19:11:09,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:09,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165666792] [2021-10-21 19:11:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:09,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:09,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:09,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:11:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:09,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:11:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:09,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-21 19:11:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:11:09,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:09,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165666792] [2021-10-21 19:11:09,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165666792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:09,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263194694] [2021-10-21 19:11:09,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:09,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:09,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:09,328 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:09,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:11:10,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:11:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:11:10,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263194694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:10,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:10,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 19 [2021-10-21 19:11:10,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950424964] [2021-10-21 19:11:10,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:11:10,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:11:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:11:10,336 INFO L87 Difference]: Start difference. First operand 313 states and 388 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:11:11,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:11,210 INFO L93 Difference]: Finished difference Result 438 states and 554 transitions. [2021-10-21 19:11:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:11:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2021-10-21 19:11:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:11,214 INFO L225 Difference]: With dead ends: 438 [2021-10-21 19:11:11,214 INFO L226 Difference]: Without dead ends: 438 [2021-10-21 19:11:11,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 525.9ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:11:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-10-21 19:11:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-10-21 19:11:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 251 states have (on average 1.350597609561753) internal successors, (339), 282 states have internal predecessors, (339), 24 states have call successors, (24), 17 states have call predecessors, (24), 26 states have return successors, (38), 23 states have call predecessors, (38), 23 states have call successors, (38) [2021-10-21 19:11:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2021-10-21 19:11:11,228 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 60 [2021-10-21 19:11:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:11,229 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2021-10-21 19:11:11,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:11:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2021-10-21 19:11:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:11:11,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:11,231 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:11,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:11,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:11,456 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash -576100065, now seen corresponding path program 1 times [2021-10-21 19:11:11,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:11,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406979772] [2021-10-21 19:11:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:11,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:11,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:11,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:11,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:11:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:11,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:11:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:11,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:11:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:11:11,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:11,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406979772] [2021-10-21 19:11:11,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406979772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:11,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61674512] [2021-10-21 19:11:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:11,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:11,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:11,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:11,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:11:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:11:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:11:12,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61674512] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:12,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:12,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-10-21 19:11:12,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430429944] [2021-10-21 19:11:12,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:11:12,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:11:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:11:12,568 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:11:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:14,223 INFO L93 Difference]: Finished difference Result 419 states and 515 transitions. [2021-10-21 19:11:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:11:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-10-21 19:11:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:14,225 INFO L225 Difference]: With dead ends: 419 [2021-10-21 19:11:14,226 INFO L226 Difference]: Without dead ends: 369 [2021-10-21 19:11:14,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1234.0ms TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 19:11:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-21 19:11:14,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 309. [2021-10-21 19:11:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 240 states have (on average 1.3291666666666666) internal successors, (319), 268 states have internal predecessors, (319), 24 states have call successors, (24), 17 states have call predecessors, (24), 23 states have return successors, (35), 23 states have call predecessors, (35), 23 states have call successors, (35) [2021-10-21 19:11:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 378 transitions. [2021-10-21 19:11:14,237 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 378 transitions. Word has length 61 [2021-10-21 19:11:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:14,238 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 378 transitions. [2021-10-21 19:11:14,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:11:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 378 transitions. [2021-10-21 19:11:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:11:14,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:14,240 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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 19:11:14,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:14,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:11:14,468 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1277164643, now seen corresponding path program 2 times [2021-10-21 19:11:14,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:14,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908649515] [2021-10-21 19:11:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:14,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:14,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:14,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:11:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:11:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:14,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:11:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-21 19:11:14,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:14,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908649515] [2021-10-21 19:11:14,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908649515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:14,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590811719] [2021-10-21 19:11:14,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:14,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:14,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:14,812 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:14,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:11:15,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:15,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:11:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:15,653 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 19:11:15,711 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 19:11:16,008 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:11:16,008 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 24 [2021-10-21 19:11:16,827 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-21 19:11:16,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-10-21 19:11:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 19:11:16,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590811719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:16,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:16,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-10-21 19:11:16,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116353474] [2021-10-21 19:11:16,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:11:16,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:11:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:11:16,898 INFO L87 Difference]: Start difference. First operand 309 states and 378 transitions. Second operand has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:11:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:18,359 INFO L93 Difference]: Finished difference Result 394 states and 472 transitions. [2021-10-21 19:11:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:11:18,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2021-10-21 19:11:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:18,361 INFO L225 Difference]: With dead ends: 394 [2021-10-21 19:11:18,362 INFO L226 Difference]: Without dead ends: 394 [2021-10-21 19:11:18,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 843.3ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:11:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-21 19:11:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 339. [2021-10-21 19:11:18,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.3408239700374531) internal successors, (358), 294 states have internal predecessors, (358), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-21 19:11:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2021-10-21 19:11:18,373 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 61 [2021-10-21 19:11:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:18,373 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2021-10-21 19:11:18,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 17 states have internal predecessors, (70), 5 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-21 19:11:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2021-10-21 19:11:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:11:18,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:18,375 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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 19:11:18,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:18,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:11:18,588 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_insertErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1277164642, now seen corresponding path program 1 times [2021-10-21 19:11:18,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:18,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657344298] [2021-10-21 19:11:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:18,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:18,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:11:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:18,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:11:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:18,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:11:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-21 19:11:18,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:18,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657344298] [2021-10-21 19:11:18,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657344298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:18,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798346891] [2021-10-21 19:11:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:18,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:18,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:18,924 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:18,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:11:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:11:19,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:19,727 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 19:11:19,863 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:11:19,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 19 [2021-10-21 19:11:20,060 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:11:20,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-21 19:11:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 19:11:20,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798346891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:20,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:20,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2021-10-21 19:11:20,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894715604] [2021-10-21 19:11:20,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:11:20,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:11:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:11:20,082 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-21 19:11:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:20,915 INFO L93 Difference]: Finished difference Result 369 states and 447 transitions. [2021-10-21 19:11:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:11:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 61 [2021-10-21 19:11:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:20,918 INFO L225 Difference]: With dead ends: 369 [2021-10-21 19:11:20,919 INFO L226 Difference]: Without dead ends: 369 [2021-10-21 19:11:20,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:11:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-21 19:11:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 339. [2021-10-21 19:11:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.3333333333333333) internal successors, (356), 294 states have internal predecessors, (356), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-21 19:11:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 419 transitions. [2021-10-21 19:11:20,930 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 419 transitions. Word has length 61 [2021-10-21 19:11:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:20,930 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 419 transitions. [2021-10-21 19:11:20,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.875) internal successors, (62), 14 states have internal predecessors, (62), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-21 19:11:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 419 transitions. [2021-10-21 19:11:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:11:20,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:20,932 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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 19:11:20,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:21,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:11:21,156 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash 534522131, now seen corresponding path program 2 times [2021-10-21 19:11:21,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:21,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039387916] [2021-10-21 19:11:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:21,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:21,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:21,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:21,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:21,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-21 19:11:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:11:21,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:21,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039387916] [2021-10-21 19:11:21,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039387916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:21,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555339370] [2021-10-21 19:11:21,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:21,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:21,368 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:21,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:11:22,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:22,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:22,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:11:22,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-21 19:11:22,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555339370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:22,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:22,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-21 19:11:22,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644498429] [2021-10-21 19:11:22,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:11:22,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:11:22,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:11:22,464 INFO L87 Difference]: Start difference. First operand 339 states and 419 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-21 19:11:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:23,865 INFO L93 Difference]: Finished difference Result 548 states and 709 transitions. [2021-10-21 19:11:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:11:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2021-10-21 19:11:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:23,868 INFO L225 Difference]: With dead ends: 548 [2021-10-21 19:11:23,869 INFO L226 Difference]: Without dead ends: 538 [2021-10-21 19:11:23,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1156.6ms TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:11:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-21 19:11:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 341. [2021-10-21 19:11:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 269 states have (on average 1.3308550185873607) internal successors, (358), 296 states have internal predecessors, (358), 26 states have call successors, (26), 19 states have call predecessors, (26), 25 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2021-10-21 19:11:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 421 transitions. [2021-10-21 19:11:23,882 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 421 transitions. Word has length 61 [2021-10-21 19:11:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:23,883 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 421 transitions. [2021-10-21 19:11:23,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-21 19:11:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 421 transitions. [2021-10-21 19:11:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:11:23,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:23,885 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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 19:11:23,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:24,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:11:24,103 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash 887610513, now seen corresponding path program 3 times [2021-10-21 19:11:24,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:24,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609305073] [2021-10-21 19:11:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:24,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:24,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:24,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:24,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-21 19:11:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:11:25,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:25,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609305073] [2021-10-21 19:11:25,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609305073] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:25,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247074469] [2021-10-21 19:11:25,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:11:25,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:25,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:25,124 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:25,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:11:25,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 19:11:25,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:25,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:11:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:25,832 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 19:11:25,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-21 19:11:27,964 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_create_~new_head~0.base Int)) (and (< sll_create_~new_head~0.base |c_#StackHeapBarrier|) (exists ((v_sll_create_~new_head~0.base_16 Int)) (and (< v_sll_create_~new_head~0.base_16 |c_#StackHeapBarrier|) (= (store (store |c_old(#valid)| v_sll_create_~new_head~0.base_16 1) sll_create_~new_head~0.base 1) |c_#valid|))))) is different from true [2021-10-21 19:11:30,231 INFO L354 Elim1Store]: treesize reduction 164, result has 11.4 percent of original size [2021-10-21 19:11:30,232 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 4 case distinctions, treesize of input 31 treesize of output 39 [2021-10-21 19:11:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 17 not checked. [2021-10-21 19:11:30,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247074469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:30,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:30,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2021-10-21 19:11:30,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679356444] [2021-10-21 19:11:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:11:30,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:30,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:11:30,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=361, Unknown=1, NotChecked=40, Total=506 [2021-10-21 19:11:30,616 INFO L87 Difference]: Start difference. First operand 341 states and 421 transitions. Second operand has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:11:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:39,467 INFO L93 Difference]: Finished difference Result 476 states and 578 transitions. [2021-10-21 19:11:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:11:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-10-21 19:11:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:39,470 INFO L225 Difference]: With dead ends: 476 [2021-10-21 19:11:39,470 INFO L226 Difference]: Without dead ends: 476 [2021-10-21 19:11:39,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 6923.2ms TimeCoverageRelationStatistics Valid=198, Invalid=734, Unknown=2, NotChecked=58, Total=992 [2021-10-21 19:11:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-10-21 19:11:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2021-10-21 19:11:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 326 states have (on average 1.343558282208589) internal successors, (438), 354 states have internal predecessors, (438), 30 states have call successors, (30), 22 states have call predecessors, (30), 30 states have return successors, (44), 30 states have call predecessors, (44), 29 states have call successors, (44) [2021-10-21 19:11:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 512 transitions. [2021-10-21 19:11:39,483 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 512 transitions. Word has length 61 [2021-10-21 19:11:39,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:39,484 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 512 transitions. [2021-10-21 19:11:39,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:11:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 512 transitions. [2021-10-21 19:11:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:11:39,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:39,486 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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 19:11:39,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:39,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:11:39,701 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:39,701 INFO L82 PathProgramCache]: Analyzing trace with hash 887610514, now seen corresponding path program 2 times [2021-10-21 19:11:39,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:39,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366241938] [2021-10-21 19:11:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:39,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:39,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:39,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:39,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-21 19:11:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-21 19:11:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:11:40,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:40,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366241938] [2021-10-21 19:11:40,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366241938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:40,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147023844] [2021-10-21 19:11:40,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:40,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:40,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:40,807 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:40,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:11:41,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:41,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:41,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:11:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:41,538 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 19:11:41,543 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 19:11:41,561 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 16 treesize of output 14 [2021-10-21 19:11:41,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-21 19:11:42,813 INFO L354 Elim1Store]: treesize reduction 164, result has 11.4 percent of original size [2021-10-21 19:11:42,813 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 4 case distinctions, treesize of input 41 treesize of output 49 [2021-10-21 19:11:42,828 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:11:42,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-10-21 19:11:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:11:43,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147023844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:43,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:43,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-10-21 19:11:43,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202596414] [2021-10-21 19:11:43,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:11:43,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:11:43,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:11:43,265 INFO L87 Difference]: Start difference. First operand 407 states and 512 transitions. Second operand has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:11:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:48,756 INFO L93 Difference]: Finished difference Result 520 states and 629 transitions. [2021-10-21 19:11:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:11:48,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-10-21 19:11:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:48,760 INFO L225 Difference]: With dead ends: 520 [2021-10-21 19:11:48,760 INFO L226 Difference]: Without dead ends: 520 [2021-10-21 19:11:48,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2308.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:11:48,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-10-21 19:11:48,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 349. [2021-10-21 19:11:48,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 276 states have (on average 1.326086956521739) internal successors, (366), 304 states have internal predecessors, (366), 26 states have call successors, (26), 19 states have call predecessors, (26), 26 states have return successors, (38), 25 states have call predecessors, (38), 25 states have call successors, (38) [2021-10-21 19:11:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 430 transitions. [2021-10-21 19:11:48,772 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 430 transitions. Word has length 61 [2021-10-21 19:11:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:48,773 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 430 transitions. [2021-10-21 19:11:48,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:11:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 430 transitions. [2021-10-21 19:11:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-21 19:11:48,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:48,775 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:48,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:48,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:48,988 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_destroyErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:48,988 INFO L82 PathProgramCache]: Analyzing trace with hash 423798166, now seen corresponding path program 1 times [2021-10-21 19:11:48,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:48,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683687723] [2021-10-21 19:11:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:48,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:49,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:49,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:49,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:11:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:49,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:11:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:49,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-21 19:11:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 19:11:49,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:49,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683687723] [2021-10-21 19:11:49,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683687723] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:49,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:49,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 19:11:49,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994297857] [2021-10-21 19:11:49,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:11:49,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:49,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:11:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:11:49,180 INFO L87 Difference]: Start difference. First operand 349 states and 430 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:11:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:50,121 INFO L93 Difference]: Finished difference Result 391 states and 477 transitions. [2021-10-21 19:11:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:11:50,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-10-21 19:11:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:50,124 INFO L225 Difference]: With dead ends: 391 [2021-10-21 19:11:50,124 INFO L226 Difference]: Without dead ends: 391 [2021-10-21 19:11:50,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:11:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-10-21 19:11:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 363. [2021-10-21 19:11:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 288 states have (on average 1.3298611111111112) internal successors, (383), 315 states have internal predecessors, (383), 27 states have call successors, (27), 20 states have call predecessors, (27), 28 states have return successors, (41), 27 states have call predecessors, (41), 26 states have call successors, (41) [2021-10-21 19:11:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 451 transitions. [2021-10-21 19:11:50,135 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 451 transitions. Word has length 64 [2021-10-21 19:11:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:50,135 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 451 transitions. [2021-10-21 19:11:50,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:11:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 451 transitions. [2021-10-21 19:11:50,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-21 19:11:50,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:50,137 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:50,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 19:11:50,137 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_destroyErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:50,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:50,138 INFO L82 PathProgramCache]: Analyzing trace with hash 423798167, now seen corresponding path program 1 times [2021-10-21 19:11:50,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:50,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991590472] [2021-10-21 19:11:50,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:50,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:11:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:11:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:50,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 19:11:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:50,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-21 19:11:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:50,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-21 19:11:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:11:50,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:50,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991590472] [2021-10-21 19:11:50,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991590472] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:50,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:50,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 19:11:50,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454821646] [2021-10-21 19:11:50,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:11:50,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:11:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:11:50,391 INFO L87 Difference]: Start difference. First operand 363 states and 451 transitions. Second operand has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:11:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:51,146 INFO L93 Difference]: Finished difference Result 401 states and 487 transitions. [2021-10-21 19:11:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:11:51,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-10-21 19:11:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:51,148 INFO L225 Difference]: With dead ends: 401 [2021-10-21 19:11:51,148 INFO L226 Difference]: Without dead ends: 401 [2021-10-21 19:11:51,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:11:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-10-21 19:11:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 368. [2021-10-21 19:11:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 294 states have (on average 1.3333333333333333) internal successors, (392), 320 states have internal predecessors, (392), 27 states have call successors, (27), 20 states have call predecessors, (27), 27 states have return successors, (39), 27 states have call predecessors, (39), 26 states have call successors, (39) [2021-10-21 19:11:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 458 transitions. [2021-10-21 19:11:51,159 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 458 transitions. Word has length 64 [2021-10-21 19:11:51,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:51,159 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 458 transitions. [2021-10-21 19:11:51,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:11:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 458 transitions. [2021-10-21 19:11:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-21 19:11:51,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:51,161 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:51,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-21 19:11:51,161 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-10-21 19:11:51,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:51,162 INFO L82 PathProgramCache]: Analyzing trace with hash 808154331, now seen corresponding path program 1 times [2021-10-21 19:11:51,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:51,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521400662] [2021-10-21 19:11:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:51,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:51,193 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:51,236 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:51,237 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:11:51,238 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr4ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:11:51,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr0REQUIRES_VIOLATION [2021-10-21 19:11:51,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr1REQUIRES_VIOLATION [2021-10-21 19:11:51,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:11:51,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:11:51,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:11:51,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr0REQUIRES_VIOLATION [2021-10-21 19:11:51,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr1REQUIRES_VIOLATION [2021-10-21 19:11:51,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr0REQUIRES_VIOLATION [2021-10-21 19:11:51,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr1REQUIRES_VIOLATION [2021-10-21 19:11:51,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:11:51,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:11:51,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:11:51,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:11:51,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:11:51,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr0REQUIRES_VIOLATION [2021-10-21 19:11:51,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr1REQUIRES_VIOLATION [2021-10-21 19:11:51,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr2REQUIRES_VIOLATION [2021-10-21 19:11:51,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr3REQUIRES_VIOLATION [2021-10-21 19:11:51,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr4REQUIRES_VIOLATION [2021-10-21 19:11:51,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr5REQUIRES_VIOLATION [2021-10-21 19:11:51,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr6REQUIRES_VIOLATION [2021-10-21 19:11:51,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr7REQUIRES_VIOLATION [2021-10-21 19:11:51,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr8REQUIRES_VIOLATION [2021-10-21 19:11:51,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_insertErr9REQUIRES_VIOLATION [2021-10-21 19:11:51,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-21 19:11:51,250 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:11:51,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:11:51 BoogieIcfgContainer [2021-10-21 19:11:51,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:11:51,288 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:11:51,288 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:11:51,289 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:11:51,289 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:08:36" (3/4) ... [2021-10-21 19:11:51,291 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:11:51,337 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:11:51,337 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:11:51,338 INFO L168 Benchmark]: Toolchain (without parser) took 195773.05 ms. Allocated memory was 90.2 MB in the beginning and 243.3 MB in the end (delta: 153.1 MB). Free memory was 53.3 MB in the beginning and 121.5 MB in the end (delta: -68.3 MB). Peak memory consumption was 84.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:51,339 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 70.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:11:51,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 516.52 ms. Allocated memory is still 90.2 MB. Free memory was 53.1 MB in the beginning and 57.9 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:51,339 INFO L168 Benchmark]: Boogie Preprocessor took 125.94 ms. Allocated memory is still 90.2 MB. Free memory was 57.9 MB in the beginning and 54.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:51,340 INFO L168 Benchmark]: RCFGBuilder took 695.98 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.8 MB in the beginning and 78.7 MB in the end (delta: -24.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:51,340 INFO L168 Benchmark]: TraceAbstraction took 194379.24 ms. Allocated memory was 109.1 MB in the beginning and 243.3 MB in the end (delta: 134.2 MB). Free memory was 78.2 MB in the beginning and 124.7 MB in the end (delta: -46.5 MB). Peak memory consumption was 86.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:51,341 INFO L168 Benchmark]: Witness Printer took 49.25 ms. Allocated memory is still 243.3 MB. Free memory was 124.7 MB in the beginning and 121.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:51,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 70.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 516.52 ms. Allocated memory is still 90.2 MB. Free memory was 53.1 MB in the beginning and 57.9 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 125.94 ms. Allocated memory is still 90.2 MB. Free memory was 57.9 MB in the beginning and 54.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 695.98 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.8 MB in the beginning and 78.7 MB in the end (delta: -24.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 194379.24 ms. Allocated memory was 109.1 MB in the beginning and 243.3 MB in the end (delta: 134.2 MB). Free memory was 78.2 MB in the beginning and 124.7 MB in the end (delta: -46.5 MB). Peak memory consumption was 86.7 MB. Max. memory is 16.1 GB. * Witness Printer took 49.25 ms. Allocated memory is still 243.3 MB. Free memory was 124.7 MB in the beginning and 121.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 641]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L627] CALL, EXPR _get_nondet_int(2, 5) VAL [\old(from)=2, \old(until)=5] [L620] int len = from; VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; VAL [\old(from)=2, \old(until)=5, \result=2, from=2, len=2, until=5] [L627] RET, EXPR _get_nondet_int(2, 5) VAL [_get_nondet_int(2, 5)=2] [L627] const int len = _get_nondet_int(2, 5); [L628] SLL s = sll_create(len); VAL [len=2, s={3:0}] [L628] CALL, EXPR sll_create(len) VAL [\old(len)=2] [L575] SLL head = ((void *)0); VAL [\old(len)=2, head={0:0}, len=2] [L576] EXPR len-- VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L581] new_head->next = head VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L582] head = new_head VAL [\old(len)=2, head={-1:0}, len=1, new_head={-1:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-1:0}, len=0, len--=1, new_head={-1:0}] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L581] new_head->next = head VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L582] head = new_head VAL [\old(len)=2, head={-2:0}, len=0, new_head={-2:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-2:0}, len=-1, len--=0, new_head={-2:0}] [L576] COND FALSE !(len-- > 0) [L584] return head; VAL [\old(len)=2, \result={-2:0}, head={-2:0}, len=-1, new_head={-2:0}] [L628] RET, EXPR sll_create(len) VAL [len=2, s={3:0}, sll_create(len)={-2:0}] [L628] SLL s = sll_create(len); [L629] CALL, EXPR _get_nondet_int(0, len - 1) VAL [\old(from)=0, \old(until)=1] [L620] int len = from; VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L621] COND TRUE len < until && __VERIFIER_nondet_int() [L622] len++ VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; VAL [\old(from)=0, \old(until)=1, \result=1, from=0, len=1, until=1] [L629] RET, EXPR _get_nondet_int(0, len - 1) VAL [_get_nondet_int(0, len - 1)=1, len=2, s={3:0}] [L629] const int k = _get_nondet_int(0, len - 1); [L630] int i = 0; VAL [i=0, k=1, len=2, s={3:0}] [L631] i < k && __VERIFIER_nondet_int() [L631] i < k && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={3:0}] [L631] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L636] EXPR \read(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}] [L636] CALL, EXPR sll_length(s) VAL [head={-2:0}] [L587] int len = 0; VAL [head={-2:0}, head={-2:0}, len=0] [L588] COND TRUE \read(head) [L589] len++ VAL [head={-2:0}, head={-2:0}, len=1] [L590] EXPR head->next VAL [head={-2:0}, head={-2:0}, head->next={-1:0}, len=1] [L590] head = head->next [L588] COND TRUE \read(head) [L589] len++ VAL [head={-2:0}, head={-1:0}, len=2] [L590] EXPR head->next VAL [head={-2:0}, head={-1:0}, head->next={0:0}, len=2] [L590] head = head->next [L588] COND FALSE !(\read(head)) VAL [head={-2:0}, head={0:0}, len=2] [L592] return len; VAL [\result=2, head={-2:0}, head={0:0}, len=2] [L636] RET, EXPR sll_length(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}, sll_length(s)=2] [L636] COND TRUE k + len != sll_length(s) [L641] reach_error() VAL [i=0, k=1, len=2, s={3:0}] - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 116 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 194258.6ms, OverallIterations: 33, TraceHistogramMax: 5, EmptinessCheckTime: 51.5ms, AutomataDifference: 145940.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2809 SDtfs, 8137 SDslu, 15350 SDs, 0 SdLazy, 25167 SolverSat, 2022 SolverUnsat, 92 SolverUnknown, 0 SolverNotchecked, 120259.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2080 GetRequests, 1265 SyntacticMatches, 27 SemanticMatches, 788 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3942 ImplicationChecksByTransitivity, 37670.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=407occurred in iteration=29, InterpolantAutomatonStates: 472, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 447.4ms AutomataMinimizationTime, 32 MinimizatonAttempts, 2160 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 295.4ms SsaConstructionTime, 1074.5ms SatisfiabilityAnalysisTime, 32332.9ms InterpolantComputationTime, 2769 NumberOfCodeBlocks, 2769 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 2652 ConstructedInterpolants, 327 QuantifiedInterpolants, 41221 SizeOfPredicates, 144 NumberOfNonLiveVariables, 5550 ConjunctsInSsa, 445 ConjunctsInUnsatCore, 54 InterpolantComputations, 12 PerfectInterpolantSequences, 800/1391 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:11:51,568 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-21 19:11:51,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1074ca90-4e15-4d61-b825-046c618aae2c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...