./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:52:22,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:52:22,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:52:22,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:52:22,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:52:22,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:52:22,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:52:22,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:52:22,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:52:22,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:52:22,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:52:22,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:52:22,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:52:22,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:52:22,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:52:22,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:52:22,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:52:22,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:52:22,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:52:22,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:52:22,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:52:22,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:52:22,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:52:22,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:52:22,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:52:22,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:52:22,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:52:22,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:52:22,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:52:22,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:52:22,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:52:22,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:52:22,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:52:22,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:52:22,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:52:22,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:52:22,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:52:22,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:52:22,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:52:22,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:52:22,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:52:22,206 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:52:22,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:52:22,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:52:22,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:52:22,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:52:22,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:52:22,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:52:22,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:52:22,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:52:22,263 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:52:22,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:52:22,264 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:52:22,264 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:52:22,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:52:22,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:52:22,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:52:22,264 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:52:22,265 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:52:22,265 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:52:22,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:52:22,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:52:22,265 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:52:22,266 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:52:22,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:52:22,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:52:22,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:52:22,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:52:22,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:52:22,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:52:22,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:52:22,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:52:22,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:52:22,268 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_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2021-11-19 04:52:22,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:52:22,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:52:22,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:52:22,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:52:22,619 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:52:22,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-11-19 04:52:22,683 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/data/6fb29fc53/5a1a7547f3fd4ae1a3b57ca1a9b80b80/FLAGad88f348a [2021-11-19 04:52:23,226 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:52:23,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-11-19 04:52:23,241 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/data/6fb29fc53/5a1a7547f3fd4ae1a3b57ca1a9b80b80/FLAGad88f348a [2021-11-19 04:52:23,531 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/data/6fb29fc53/5a1a7547f3fd4ae1a3b57ca1a9b80b80 [2021-11-19 04:52:23,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:52:23,535 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:52:23,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:52:23,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:52:23,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:52:23,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:23" (1/1) ... [2021-11-19 04:52:23,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fba6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:23, skipping insertion in model container [2021-11-19 04:52:23,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:23" (1/1) ... [2021-11-19 04:52:23,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:52:23,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:52:24,020 WARN L230 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_4320de4b-5098-4c63-8bce-45f5ce44ba5c/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-11-19 04:52:24,031 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:52:24,040 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:52:24,087 WARN L230 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_4320de4b-5098-4c63-8bce-45f5ce44ba5c/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-11-19 04:52:24,088 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:52:24,132 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:52:24,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24 WrapperNode [2021-11-19 04:52:24,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:52:24,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:52:24,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:52:24,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:52:24,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (1/1) ... [2021-11-19 04:52:24,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (1/1) ... [2021-11-19 04:52:24,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (1/1) ... [2021-11-19 04:52:24,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (1/1) ... [2021-11-19 04:52:24,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (1/1) ... [2021-11-19 04:52:24,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (1/1) ... [2021-11-19 04:52:24,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (1/1) ... [2021-11-19 04:52:24,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:52:24,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:52:24,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:52:24,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:52:24,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (1/1) ... [2021-11-19 04:52:24,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:52:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:24,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:52:24,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:52:24,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:52:24,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:52:24,309 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:52:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 04:52:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 04:52:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-19 04:52:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-19 04:52:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-11-19 04:52:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-11-19 04:52:24,310 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2021-11-19 04:52:24,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:52:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:52:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:52:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-19 04:52:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-19 04:52:24,311 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:52:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:52:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 04:52:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 04:52:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:52:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:52:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:52:24,312 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:52:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:52:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:52:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:52:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:52:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:52:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:52:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:52:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:52:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:52:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:52:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:52:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:52:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:52:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:52:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:52:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:52:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:52:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:52:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:52:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:52:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:52:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:52:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:52:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:52:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:52:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:52:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:52:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-19 04:52:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:52:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:52:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:52:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:52:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:52:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:52:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:52:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:52:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:52:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:52:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:52:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:52:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:52:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:52:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:52:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:52:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:52:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:52:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:52:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:52:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:52:24,323 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:52:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:52:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:52:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:52:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:52:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:52:24,324 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:52:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:52:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:52:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:52:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:52:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:52:24,325 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:52:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:52:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:52:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:52:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:52:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:52:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:52:24,326 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:52:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:52:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:52:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:52:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:52:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:52:24,327 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:52:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-19 04:52:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-19 04:52:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:52:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:52:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:52:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-11-19 04:52:24,328 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-11-19 04:52:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:52:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:52:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2021-11-19 04:52:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:52:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:52:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 04:52:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:52:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:52:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:52:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:52:24,696 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:52:24,699 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:52:24,731 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-19 04:52:24,973 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:52:24,982 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:52:24,983 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 04:52:24,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:24 BoogieIcfgContainer [2021-11-19 04:52:24,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:52:24,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:52:24,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:52:24,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:52:24,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:52:23" (1/3) ... [2021-11-19 04:52:24,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@934ab0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:24, skipping insertion in model container [2021-11-19 04:52:24,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:24" (2/3) ... [2021-11-19 04:52:24,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@934ab0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:24, skipping insertion in model container [2021-11-19 04:52:24,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:24" (3/3) ... [2021-11-19 04:52:24,997 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2021-11-19 04:52:25,004 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:52:25,005 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-11-19 04:52:25,060 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:52:25,069 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:52:25,070 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-11-19 04:52:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 84 states have internal predecessors, (96), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:52:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:52:25,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:25,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:25,106 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:25,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1024606834, now seen corresponding path program 1 times [2021-11-19 04:52:25,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:25,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341840512] [2021-11-19 04:52:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:25,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:25,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:25,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341840512] [2021-11-19 04:52:25,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341840512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:25,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:25,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:52:25,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768470620] [2021-11-19 04:52:25,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:25,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:25,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:25,491 INFO L87 Difference]: Start difference. First operand has 99 states, 53 states have (on average 1.8113207547169812) internal successors, (96), 84 states have internal predecessors, (96), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:52:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:25,822 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-11-19 04:52:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:52:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-19 04:52:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:25,835 INFO L225 Difference]: With dead ends: 97 [2021-11-19 04:52:25,835 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 04:52:25,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:25,841 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 93 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:25,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 106 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 04:52:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-19 04:52:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.68) internal successors, (84), 78 states have internal predecessors, (84), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:52:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-11-19 04:52:25,911 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 13 [2021-11-19 04:52:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:25,911 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-11-19 04:52:25,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:52:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-11-19 04:52:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:52:25,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:25,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:25,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:52:25,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:25,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1024606835, now seen corresponding path program 1 times [2021-11-19 04:52:25,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:25,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152240053] [2021-11-19 04:52:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:25,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:26,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:26,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152240053] [2021-11-19 04:52:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152240053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:26,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:26,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:52:26,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788594311] [2021-11-19 04:52:26,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:26,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:26,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:26,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:26,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:26,053 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:52:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:26,273 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-11-19 04:52:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:52:26,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-19 04:52:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:26,277 INFO L225 Difference]: With dead ends: 89 [2021-11-19 04:52:26,278 INFO L226 Difference]: Without dead ends: 89 [2021-11-19 04:52:26,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:26,285 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 84 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:26,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 97 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:52:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-19 04:52:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-19 04:52:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.64) internal successors, (82), 76 states have internal predecessors, (82), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:52:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2021-11-19 04:52:26,307 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 13 [2021-11-19 04:52:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2021-11-19 04:52:26,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:52:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2021-11-19 04:52:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:52:26,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:26,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:26,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:52:26,311 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash -640130732, now seen corresponding path program 1 times [2021-11-19 04:52:26,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:26,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819767796] [2021-11-19 04:52:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:26,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:26,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:26,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819767796] [2021-11-19 04:52:26,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819767796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:26,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:26,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:26,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150352686] [2021-11-19 04:52:26,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:26,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:26,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:26,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:26,452 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:26,992 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-11-19 04:52:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:26,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-19 04:52:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:27,000 INFO L225 Difference]: With dead ends: 106 [2021-11-19 04:52:27,000 INFO L226 Difference]: Without dead ends: 106 [2021-11-19 04:52:27,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:27,009 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 123 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:27,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 99 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-19 04:52:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2021-11-19 04:52:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.62) internal successors, (81), 75 states have internal predecessors, (81), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:52:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-11-19 04:52:27,026 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 19 [2021-11-19 04:52:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:27,027 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-11-19 04:52:27,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-11-19 04:52:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:52:27,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:27,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:27,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:52:27,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:27,030 INFO L85 PathProgramCache]: Analyzing trace with hash -640130731, now seen corresponding path program 1 times [2021-11-19 04:52:27,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:27,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560224145] [2021-11-19 04:52:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:27,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:27,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:27,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560224145] [2021-11-19 04:52:27,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560224145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:27,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:27,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:27,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788425475] [2021-11-19 04:52:27,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:27,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:27,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:27,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:27,269 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:27,782 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-19 04:52:27,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:27,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-19 04:52:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:27,785 INFO L225 Difference]: With dead ends: 105 [2021-11-19 04:52:27,785 INFO L226 Difference]: Without dead ends: 105 [2021-11-19 04:52:27,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:27,786 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:27,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 99 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:52:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-19 04:52:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-11-19 04:52:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 50 states have (on average 1.6) internal successors, (80), 74 states have internal predecessors, (80), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:52:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-11-19 04:52:27,802 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 19 [2021-11-19 04:52:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:27,802 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-11-19 04:52:27,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:52:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-11-19 04:52:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:52:27,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:27,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:27,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:52:27,805 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1619934118, now seen corresponding path program 1 times [2021-11-19 04:52:27,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:27,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571978884] [2021-11-19 04:52:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:27,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:52:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:27,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:27,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571978884] [2021-11-19 04:52:27,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571978884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:27,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:27,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:52:27,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392743213] [2021-11-19 04:52:27,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:27,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:52:27,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:27,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:52:27,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:52:27,891 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:28,234 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2021-11-19 04:52:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:28,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-19 04:52:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:28,236 INFO L225 Difference]: With dead ends: 109 [2021-11-19 04:52:28,236 INFO L226 Difference]: Without dead ends: 106 [2021-11-19 04:52:28,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:28,237 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:28,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 98 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-19 04:52:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2021-11-19 04:52:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.588235294117647) internal successors, (81), 75 states have internal predecessors, (81), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:52:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-11-19 04:52:28,246 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 25 [2021-11-19 04:52:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:28,246 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-11-19 04:52:28,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:52:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-11-19 04:52:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:52:28,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:28,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:28,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:52:28,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:28,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1524450116, now seen corresponding path program 1 times [2021-11-19 04:52:28,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:28,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847037791] [2021-11-19 04:52:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:28,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:52:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:52:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:52:28,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:28,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847037791] [2021-11-19 04:52:28,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847037791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:28,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192695116] [2021-11-19 04:52:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:28,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:28,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:28,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:52:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:52:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:52:28,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:52:28,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192695116] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:28,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:28,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2021-11-19 04:52:28,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683924439] [2021-11-19 04:52:28,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:28,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:52:29,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:52:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:52:29,001 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 12 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 04:52:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:29,459 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-11-19 04:52:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:52:29,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 38 [2021-11-19 04:52:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:29,462 INFO L225 Difference]: With dead ends: 115 [2021-11-19 04:52:29,462 INFO L226 Difference]: Without dead ends: 112 [2021-11-19 04:52:29,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:52:29,464 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 190 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:29,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 98 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:52:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-19 04:52:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-11-19 04:52:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 80 states have internal predecessors, (86), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:52:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-11-19 04:52:29,487 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 38 [2021-11-19 04:52:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:29,488 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-11-19 04:52:29,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 04:52:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-11-19 04:52:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:52:29,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:29,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:29,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:29,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:29,692 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1347685478, now seen corresponding path program 2 times [2021-11-19 04:52:29,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:29,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831439539] [2021-11-19 04:52:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:29,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:52:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:52:30,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:30,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831439539] [2021-11-19 04:52:30,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831439539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:30,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334076805] [2021-11-19 04:52:30,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:52:30,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:30,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:30,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:30,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:52:30,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:52:30,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:52:30,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:30,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:52:30,808 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 11 treesize of output 9 [2021-11-19 04:52:31,112 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-19 04:52:31,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 19 [2021-11-19 04:52:31,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-19 04:52:31,378 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:52:31,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2021-11-19 04:52:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:52:31,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:37,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334076805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:37,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:52:37,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-19 04:52:37,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378776902] [2021-11-19 04:52:37,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:37,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:52:37,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:37,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:52:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=384, Unknown=3, NotChecked=0, Total=462 [2021-11-19 04:52:37,548 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 04:52:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:39,059 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2021-11-19 04:52:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:52:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 51 [2021-11-19 04:52:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:39,062 INFO L225 Difference]: With dead ends: 151 [2021-11-19 04:52:39,063 INFO L226 Difference]: Without dead ends: 151 [2021-11-19 04:52:39,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=204, Invalid=915, Unknown=3, NotChecked=0, Total=1122 [2021-11-19 04:52:39,065 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 273 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:39,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 164 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 821 Invalid, 0 Unknown, 315 Unchecked, 0.9s Time] [2021-11-19 04:52:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-19 04:52:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2021-11-19 04:52:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 97 states have internal predecessors, (106), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:52:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2021-11-19 04:52:39,078 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 51 [2021-11-19 04:52:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:39,079 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2021-11-19 04:52:39,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 04:52:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2021-11-19 04:52:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:52:39,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:39,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:39,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:39,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:39,297 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_insertErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:39,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1347685479, now seen corresponding path program 1 times [2021-11-19 04:52:39,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:39,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708993481] [2021-11-19 04:52:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:39,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:39,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:39,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:52:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:39,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:39,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:52:40,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:40,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708993481] [2021-11-19 04:52:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708993481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:40,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938790045] [2021-11-19 04:52:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:40,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:40,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:40,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:52:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:40,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:52:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:40,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:52:40,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-19 04:52:40,910 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-19 04:52:40,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-11-19 04:52:41,138 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 04:52:41,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2021-11-19 04:52:41,247 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-19 04:52:41,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-19 04:52:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:52:41,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:43,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938790045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:43,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:52:43,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-19 04:52:43,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38622757] [2021-11-19 04:52:43,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:43,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:52:43,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:52:43,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=423, Unknown=1, NotChecked=0, Total=506 [2021-11-19 04:52:43,497 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 04:52:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:44,366 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2021-11-19 04:52:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:52:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2021-11-19 04:52:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:44,369 INFO L225 Difference]: With dead ends: 150 [2021-11-19 04:52:44,369 INFO L226 Difference]: Without dead ends: 150 [2021-11-19 04:52:44,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=132, Invalid=679, Unknown=1, NotChecked=0, Total=812 [2021-11-19 04:52:44,370 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 258 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:44,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 171 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 661 Invalid, 0 Unknown, 346 Unchecked, 0.7s Time] [2021-11-19 04:52:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-19 04:52:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2021-11-19 04:52:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.4939759036144578) internal successors, (124), 107 states have internal predecessors, (124), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:52:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2021-11-19 04:52:44,393 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 51 [2021-11-19 04:52:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:44,394 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2021-11-19 04:52:44,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 04:52:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2021-11-19 04:52:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:52:44,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:44,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:44,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:44,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 04:52:44,625 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_insertErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:52:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:44,626 INFO L85 PathProgramCache]: Analyzing trace with hash -456106334, now seen corresponding path program 1 times [2021-11-19 04:52:44,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:44,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937026648] [2021-11-19 04:52:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:44,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:52:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:44,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:52:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:45,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:52:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:45,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:45,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:52:45,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:45,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937026648] [2021-11-19 04:52:45,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937026648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:45,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117069871] [2021-11-19 04:52:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:45,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:45,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:45,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:52:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-19 04:52:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:45,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:52:46,654 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 35 treesize of output 27 [2021-11-19 04:52:46,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 04:52:59,656 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-19 04:52:59,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 76 [2021-11-19 04:52:59,686 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 04:52:59,687 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 77 treesize of output 79 [2021-11-19 04:52:59,750 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-19 04:52:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 64 [2021-11-19 04:52:59,771 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 04:52:59,771 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 65 treesize of output 65 [2021-11-19 04:53:00,111 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:53:00,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 55 [2021-11-19 04:53:00,123 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:53:00,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 31 [2021-11-19 04:53:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:53:00,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:07,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117069871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:07,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:53:07,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2021-11-19 04:53:07,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589184692] [2021-11-19 04:53:07,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:07,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 04:53:07,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 04:53:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1769, Unknown=7, NotChecked=0, Total=1892 [2021-11-19 04:53:07,234 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 40 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 31 states have internal predecessors, (71), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 04:53:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:28,367 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2021-11-19 04:53:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:53:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 31 states have internal predecessors, (71), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-11-19 04:53:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:28,370 INFO L225 Difference]: With dead ends: 159 [2021-11-19 04:53:28,370 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 04:53:28,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=254, Invalid=3514, Unknown=14, NotChecked=0, Total=3782 [2021-11-19 04:53:28,373 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 191 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:28,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 403 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2287 Invalid, 0 Unknown, 396 Unchecked, 4.2s Time] [2021-11-19 04:53:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 04:53:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 131. [2021-11-19 04:53:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 111 states have internal predecessors, (132), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:53:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2021-11-19 04:53:28,382 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 54 [2021-11-19 04:53:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:28,383 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2021-11-19 04:53:28,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 31 states have internal predecessors, (71), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-19 04:53:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2021-11-19 04:53:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:53:28,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:28,385 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:28,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:28,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:28,606 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_insertErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:53:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash -456106335, now seen corresponding path program 1 times [2021-11-19 04:53:28,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:28,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797302953] [2021-11-19 04:53:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:28,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:28,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:53:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:28,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:53:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:29,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:29,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:53:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:29,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:53:29,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:29,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797302953] [2021-11-19 04:53:29,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797302953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:29,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427300387] [2021-11-19 04:53:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:29,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:29,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:29,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:53:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:29,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:53:29,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:30,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:53:30,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:53:35,696 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-11-19 04:53:35,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 33 [2021-11-19 04:53:35,733 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 04:53:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-19 04:53:35,998 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:53:35,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-11-19 04:53:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:53:36,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:38,237 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_node_create_~temp~0.offset_29 Int) (v_node_create_~temp~0.base_34 Int) (v_DerPreprocessor_3 Int)) (or (= (select (store |c_#valid| v_node_create_~temp~0.base_34 1) (select (select (store |c_#memory_$Pointer$.base| v_node_create_~temp~0.base_34 (store (store (select |c_#memory_$Pointer$.base| v_node_create_~temp~0.base_34) (+ v_node_create_~temp~0.offset_29 4) 0) v_node_create_~temp~0.offset_29 v_DerPreprocessor_3)) c_sll_insert_~head.base) c_sll_insert_~head.offset)) 1) (<= |c_#StackHeapBarrier| v_node_create_~temp~0.base_34))) is different from false [2021-11-19 04:53:38,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427300387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:38,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:53:38,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 30 [2021-11-19 04:53:38,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911366675] [2021-11-19 04:53:38,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:38,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:53:38,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:53:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=848, Unknown=3, NotChecked=58, Total=992 [2021-11-19 04:53:38,242 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand has 31 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 04:53:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:56,423 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2021-11-19 04:53:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:53:56,425 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2021-11-19 04:53:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:56,427 INFO L225 Difference]: With dead ends: 162 [2021-11-19 04:53:56,427 INFO L226 Difference]: Without dead ends: 162 [2021-11-19 04:53:56,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=188, Invalid=1877, Unknown=9, NotChecked=88, Total=2162 [2021-11-19 04:53:56,428 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 190 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:56,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 138 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1541 Invalid, 0 Unknown, 177 Unchecked, 2.7s Time] [2021-11-19 04:53:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-19 04:53:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2021-11-19 04:53:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.4942528735632183) internal successors, (130), 111 states have internal predecessors, (130), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:53:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2021-11-19 04:53:56,437 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 54 [2021-11-19 04:53:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:56,437 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2021-11-19 04:53:56,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 04:53:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2021-11-19 04:53:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:53:56,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:56,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:56,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:56,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:56,664 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_insertErr4REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:53:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1254396018, now seen corresponding path program 1 times [2021-11-19 04:53:56,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:56,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360221928] [2021-11-19 04:53:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:56,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:56,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:53:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:56,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:53:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:56,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:56,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:53:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:56,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 04:53:56,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:56,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360221928] [2021-11-19 04:53:56,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360221928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:56,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:53:56,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:53:56,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849734051] [2021-11-19 04:53:56,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:56,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:53:56,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:53:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:53:56,818 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:53:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:57,340 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2021-11-19 04:53:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:53:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-19 04:53:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:57,342 INFO L225 Difference]: With dead ends: 154 [2021-11-19 04:53:57,342 INFO L226 Difference]: Without dead ends: 154 [2021-11-19 04:53:57,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:53:57,343 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 122 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:57,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 87 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:53:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-19 04:53:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-11-19 04:53:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 89 states have (on average 1.4831460674157304) internal successors, (132), 113 states have internal predecessors, (132), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:53:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2021-11-19 04:53:57,351 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 55 [2021-11-19 04:53:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:57,351 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2021-11-19 04:53:57,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:53:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2021-11-19 04:53:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:53:57,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:57,353 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:57,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:53:57,353 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_insertErr6REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:53:57,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1254395858, now seen corresponding path program 1 times [2021-11-19 04:53:57,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:57,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790768727] [2021-11-19 04:53:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:57,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:53:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:53:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:53:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 04:53:57,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:57,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790768727] [2021-11-19 04:53:57,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790768727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:57,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:53:57,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:53:57,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865460570] [2021-11-19 04:53:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:57,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:53:57,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:57,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:53:57,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:53:57,493 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:53:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:57,990 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2021-11-19 04:53:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:53:57,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-19 04:53:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:57,992 INFO L225 Difference]: With dead ends: 145 [2021-11-19 04:53:57,993 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 04:53:57,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:53:57,993 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 119 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:57,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 76 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:53:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 04:53:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2021-11-19 04:53:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.4606741573033708) internal successors, (130), 112 states have internal predecessors, (130), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:53:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2021-11-19 04:53:58,000 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 55 [2021-11-19 04:53:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:58,000 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2021-11-19 04:53:58,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:53:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2021-11-19 04:53:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:53:58,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:58,004 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:58,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:53:58,004 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_insertErr7REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:53:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:58,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1254395857, now seen corresponding path program 1 times [2021-11-19 04:53:58,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:58,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358425819] [2021-11-19 04:53:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:58,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:58,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:53:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:58,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:53:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:58,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:58,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:53:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:58,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 04:53:58,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:58,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358425819] [2021-11-19 04:53:58,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358425819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:58,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:53:58,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:53:58,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875853120] [2021-11-19 04:53:58,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:58,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:53:58,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:58,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:53:58,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:53:58,244 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:53:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:59,060 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2021-11-19 04:53:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:53:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2021-11-19 04:53:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:59,062 INFO L225 Difference]: With dead ends: 144 [2021-11-19 04:53:59,062 INFO L226 Difference]: Without dead ends: 144 [2021-11-19 04:53:59,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:53:59,063 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:59,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 86 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:53:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-19 04:53:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2021-11-19 04:53:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 111 states have internal predecessors, (128), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:53:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2021-11-19 04:53:59,070 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 55 [2021-11-19 04:53:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:59,071 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2021-11-19 04:53:59,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:53:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2021-11-19 04:53:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:53:59,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:59,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:59,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:53:59,073 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_insertErr8REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:53:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash -231565803, now seen corresponding path program 1 times [2021-11-19 04:53:59,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:59,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878629196] [2021-11-19 04:53:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:59,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:59,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:53:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:59,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:53:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:59,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:53:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:59,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:53:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:59,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:53:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:53:59,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:59,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878629196] [2021-11-19 04:53:59,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878629196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:53:59,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:53:59,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:53:59,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926201685] [2021-11-19 04:53:59,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:53:59,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:53:59,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:53:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:53:59,294 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:54:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:00,334 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2021-11-19 04:54:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:54:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2021-11-19 04:54:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:00,336 INFO L225 Difference]: With dead ends: 143 [2021-11-19 04:54:00,336 INFO L226 Difference]: Without dead ends: 143 [2021-11-19 04:54:00,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:54:00,337 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 118 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:00,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 83 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:54:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-19 04:54:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 130. [2021-11-19 04:54:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 89 states have (on average 1.4157303370786516) internal successors, (126), 110 states have internal predecessors, (126), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:54:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 150 transitions. [2021-11-19 04:54:00,345 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 150 transitions. Word has length 56 [2021-11-19 04:54:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:00,346 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 150 transitions. [2021-11-19 04:54:00,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:54:00,346 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 150 transitions. [2021-11-19 04:54:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:54:00,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:00,347 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:00,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:54:00,348 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_insertErr9REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:54:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash -231565802, now seen corresponding path program 1 times [2021-11-19 04:54:00,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:00,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385446303] [2021-11-19 04:54:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:00,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:00,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:00,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:00,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:00,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:54:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:00,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 04:54:00,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:00,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385446303] [2021-11-19 04:54:00,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385446303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:00,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:00,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:54:00,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365561935] [2021-11-19 04:54:00,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:00,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:00,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:00,550 INFO L87 Difference]: Start difference. First operand 130 states and 150 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:54:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:01,411 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2021-11-19 04:54:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:54:01,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2021-11-19 04:54:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:01,413 INFO L225 Difference]: With dead ends: 141 [2021-11-19 04:54:01,413 INFO L226 Difference]: Without dead ends: 141 [2021-11-19 04:54:01,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:54:01,415 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 151 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:01,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 95 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:54:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-19 04:54:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2021-11-19 04:54:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 108 states have internal predecessors, (122), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:54:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2021-11-19 04:54:01,434 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 56 [2021-11-19 04:54:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:01,435 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2021-11-19 04:54:01,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:54:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2021-11-19 04:54:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:54:01,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:01,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:01,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:54:01,437 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_insertErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:54:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:01,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1412812628, now seen corresponding path program 1 times [2021-11-19 04:54:01,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:01,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760624994] [2021-11-19 04:54:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:01,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:01,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:01,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:01,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:01,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:54:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:01,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 04:54:01,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:01,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760624994] [2021-11-19 04:54:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760624994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:01,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:01,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:54:01,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008204038] [2021-11-19 04:54:01,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:01,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:54:01,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:54:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:54:01,655 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:54:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:02,457 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2021-11-19 04:54:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:54:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 57 [2021-11-19 04:54:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:02,459 INFO L225 Difference]: With dead ends: 137 [2021-11-19 04:54:02,459 INFO L226 Difference]: Without dead ends: 137 [2021-11-19 04:54:02,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:54:02,461 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 161 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:02,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 92 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:54:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-19 04:54:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2021-11-19 04:54:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 104 states have internal predecessors, (114), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:54:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2021-11-19 04:54:02,470 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 57 [2021-11-19 04:54:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:02,470 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2021-11-19 04:54:02,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:54:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2021-11-19 04:54:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 04:54:02,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:02,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:02,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:54:02,473 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_insertErr4REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:54:02,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:02,473 INFO L85 PathProgramCache]: Analyzing trace with hash 847516956, now seen corresponding path program 1 times [2021-11-19 04:54:02,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:02,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162134837] [2021-11-19 04:54:02,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:02,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:54:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 04:54:02,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:02,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162134837] [2021-11-19 04:54:02,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162134837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:02,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:02,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:54:02,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576943569] [2021-11-19 04:54:02,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:02,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:54:02,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:54:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:54:02,650 INFO L87 Difference]: Start difference. First operand 124 states and 138 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:54:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:03,259 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2021-11-19 04:54:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:54:03,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2021-11-19 04:54:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:03,261 INFO L225 Difference]: With dead ends: 136 [2021-11-19 04:54:03,261 INFO L226 Difference]: Without dead ends: 136 [2021-11-19 04:54:03,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:54:03,263 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 107 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:03,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 77 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:54:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-19 04:54:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2021-11-19 04:54:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 103 states have internal predecessors, (112), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:54:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-11-19 04:54:03,271 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 58 [2021-11-19 04:54:03,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:03,271 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-11-19 04:54:03,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:54:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-11-19 04:54:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 04:54:03,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:03,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:03,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:54:03,273 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_insertErr5REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:54:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash 847516957, now seen corresponding path program 1 times [2021-11-19 04:54:03,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:03,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714196055] [2021-11-19 04:54:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:03,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:03,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:04,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:04,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:54:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:04,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:54:04,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:04,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714196055] [2021-11-19 04:54:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714196055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:04,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542566769] [2021-11-19 04:54:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:04,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:04,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:04,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:54:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:54:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 04:54:04,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:54:04,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542566769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:04,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:54:04,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [22] total 24 [2021-11-19 04:54:04,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146552632] [2021-11-19 04:54:04,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:04,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:54:04,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:54:04,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:54:04,997 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:54:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:05,152 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2021-11-19 04:54:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:54:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2021-11-19 04:54:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:05,154 INFO L225 Difference]: With dead ends: 122 [2021-11-19 04:54:05,154 INFO L226 Difference]: Without dead ends: 122 [2021-11-19 04:54:05,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:54:05,156 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 7 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:05,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 206 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-19 04:54:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-19 04:54:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 102 states have internal predecessors, (110), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:54:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2021-11-19 04:54:05,164 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 58 [2021-11-19 04:54:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:05,164 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2021-11-19 04:54:05,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:54:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2021-11-19 04:54:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 04:54:05,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:05,166 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:05,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:05,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:54:05,386 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_insertErr9REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:54:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:05,387 INFO L85 PathProgramCache]: Analyzing trace with hash 503221992, now seen corresponding path program 1 times [2021-11-19 04:54:05,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:05,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177255856] [2021-11-19 04:54:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:05,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:05,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:05,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:05,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:54:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:05,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:54:05,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:05,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177255856] [2021-11-19 04:54:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177255856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:05,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:54:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660746475] [2021-11-19 04:54:05,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:54:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:54:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:54:05,681 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:54:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:06,672 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-11-19 04:54:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:54:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-11-19 04:54:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:06,674 INFO L225 Difference]: With dead ends: 134 [2021-11-19 04:54:06,674 INFO L226 Difference]: Without dead ends: 134 [2021-11-19 04:54:06,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:54:06,675 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 104 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:06,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 81 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:54:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-19 04:54:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2021-11-19 04:54:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 101 states have internal predecessors, (108), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:54:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2021-11-19 04:54:06,683 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 59 [2021-11-19 04:54:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:06,684 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2021-11-19 04:54:06,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:54:06,684 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2021-11-19 04:54:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 04:54:06,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:06,686 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:06,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:54:06,686 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:54:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:06,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2050604163, now seen corresponding path program 1 times [2021-11-19 04:54:06,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:06,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441603332] [2021-11-19 04:54:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:06,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:06,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:06,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:06,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:54:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:06,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:54:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:06,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:54:06,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:06,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441603332] [2021-11-19 04:54:06,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441603332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:06,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:06,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:54:06,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589330877] [2021-11-19 04:54:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:06,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:54:06,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:54:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:54:06,964 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:54:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:07,871 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-11-19 04:54:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:54:07,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2021-11-19 04:54:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:07,874 INFO L225 Difference]: With dead ends: 132 [2021-11-19 04:54:07,874 INFO L226 Difference]: Without dead ends: 132 [2021-11-19 04:54:07,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:54:07,875 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 146 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:07,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 71 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:54:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-19 04:54:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 119. [2021-11-19 04:54:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 99 states have internal predecessors, (105), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:54:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2021-11-19 04:54:07,883 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 62 [2021-11-19 04:54:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:07,883 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2021-11-19 04:54:07,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:54:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2021-11-19 04:54:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:54:07,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:07,885 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:07,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:54:07,885 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_insertErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:54:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:07,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1923044732, now seen corresponding path program 3 times [2021-11-19 04:54:07,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:07,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993054431] [2021-11-19 04:54:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:07,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:07,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:08,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:54:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:08,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:54:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:08,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:08,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993054431] [2021-11-19 04:54:08,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993054431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:08,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917131297] [2021-11-19 04:54:08,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:54:08,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:08,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:08,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:54:08,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:54:08,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:08,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:54:08,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:54:08,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:09,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917131297] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:09,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:54:09,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 14 [2021-11-19 04:54:09,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653963443] [2021-11-19 04:54:09,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:09,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:09,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:09,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:54:09,349 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:09,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:09,438 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-11-19 04:54:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:54:09,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2021-11-19 04:54:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:09,441 INFO L225 Difference]: With dead ends: 98 [2021-11-19 04:54:09,441 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 04:54:09,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:54:09,442 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 30 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:09,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 239 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 04:54:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-19 04:54:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 67 states have internal predecessors, (71), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:54:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-11-19 04:54:09,447 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 64 [2021-11-19 04:54:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:09,448 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-11-19 04:54:09,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-11-19 04:54:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 04:54:09,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:09,456 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:09,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:09,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-19 04:54:09,657 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:54:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2066173258, now seen corresponding path program 1 times [2021-11-19 04:54:09,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:09,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654774036] [2021-11-19 04:54:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:09,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:09,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:09,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:10,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:54:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:10,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:54:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:10,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:54:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:11,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:54:12,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:12,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654774036] [2021-11-19 04:54:12,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654774036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:12,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77072290] [2021-11-19 04:54:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:12,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:12,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:12,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:12,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:54:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:12,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-19 04:54:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:12,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:54:13,414 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 20 treesize of output 12 [2021-11-19 04:54:13,419 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 [2021-11-19 04:55:05,303 INFO L354 Elim1Store]: treesize reduction 962, result has 15.7 percent of original size [2021-11-19 04:55:05,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 449 treesize of output 305 [2021-11-19 04:55:05,385 INFO L354 Elim1Store]: treesize reduction 50, result has 35.9 percent of original size [2021-11-19 04:55:05,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 555 treesize of output 563 [2021-11-19 04:55:14,447 INFO L354 Elim1Store]: treesize reduction 134, result has 27.6 percent of original size [2021-11-19 04:55:14,448 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 987 treesize of output 811 [2021-11-19 04:55:14,617 INFO L354 Elim1Store]: treesize reduction 134, result has 27.6 percent of original size [2021-11-19 04:55:14,618 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 811 treesize of output 683 [2021-11-19 04:55:18,111 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-19 04:55:18,112 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 74 treesize of output 31 [2021-11-19 04:55:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:55:18,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:19,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77072290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:19,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:55:19,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2021-11-19 04:55:19,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296488488] [2021-11-19 04:55:19,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:19,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 04:55:19,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 04:55:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2697, Unknown=16, NotChecked=0, Total=2862 [2021-11-19 04:55:19,404 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 53 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 42 states have internal predecessors, (91), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 04:56:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:10,186 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2021-11-19 04:56:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:56:10,187 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 42 states have internal predecessors, (91), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 65 [2021-11-19 04:56:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:10,188 INFO L225 Difference]: With dead ends: 124 [2021-11-19 04:56:10,188 INFO L226 Difference]: Without dead ends: 124 [2021-11-19 04:56:10,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 102.6s TimeCoverageRelationStatistics Valid=272, Invalid=4809, Unknown=31, NotChecked=0, Total=5112 [2021-11-19 04:56:10,192 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 140 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 667 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:10,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 331 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1535 Invalid, 0 Unknown, 667 Unchecked, 2.5s Time] [2021-11-19 04:56:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-19 04:56:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 90. [2021-11-19 04:56:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 75 states have internal predecessors, (82), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 04:56:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-11-19 04:56:10,199 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 65 [2021-11-19 04:56:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:10,199 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-11-19 04:56:10,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 42 states have internal predecessors, (91), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-19 04:56:10,200 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-11-19 04:56:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 04:56:10,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:10,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:10,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 04:56:10,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-19 04:56:10,425 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 27 more)] === [2021-11-19 04:56:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:10,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2066173257, now seen corresponding path program 1 times [2021-11-19 04:56:10,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:10,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977898802] [2021-11-19 04:56:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:10,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:56:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:10,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:56:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:11,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:56:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:11,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:56:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:11,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:56:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:12,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:56:13,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:13,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977898802] [2021-11-19 04:56:13,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977898802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:13,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484299543] [2021-11-19 04:56:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:13,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:13,330 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:13,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4320de4b-5098-4c63-8bce-45f5ce44ba5c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:56:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-19 04:56:13,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:14,146 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 20 treesize of output 16 [2021-11-19 04:56:14,153 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 11 treesize of output 7 [2021-11-19 04:56:51,033 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_insert_~new_node~0.base Int) (sll_insert_~last~0.base Int) (sll_insert_~new_node~0.offset Int) (sll_insert_~last~0.offset Int)) (and (exists ((sll_insert_~snd_to_last~0.offset Int) (v_DerPreprocessor_7 Int) (v_DerPreprocessor_6 Int) (node_create_~temp~0.offset Int)) (let ((.cse7 (+ node_create_~temp~0.offset 4))) (let ((.cse6 (store |c_old(#memory_$Pointer$.base)| sll_insert_~new_node~0.base (store (store (select |c_old(#memory_$Pointer$.base)| sll_insert_~new_node~0.base) .cse7 0) node_create_~temp~0.offset v_DerPreprocessor_6)))) (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| sll_insert_~new_node~0.base (store (store (select |c_old(#memory_$Pointer$.offset)| sll_insert_~new_node~0.base) .cse7 0) node_create_~temp~0.offset v_DerPreprocessor_7))) (.cse3 (+ sll_insert_~new_node~0.offset 4)) (.cse1 (select (select .cse6 |c_sll_insert_#in~head.base|) |c_sll_insert_#in~head.offset|)) (.cse4 (+ sll_insert_~snd_to_last~0.offset 4))) (and (<= (+ (select (select .cse0 |c_sll_insert_#in~head.base|) |c_sll_insert_#in~head.offset|) 8) (select |c_#length| .cse1)) (= |c_#memory_$Pointer$.offset| (let ((.cse2 (store .cse0 .cse1 (store (select .cse0 .cse1) .cse4 sll_insert_~new_node~0.offset)))) (store .cse2 sll_insert_~new_node~0.base (store (select .cse2 sll_insert_~new_node~0.base) .cse3 sll_insert_~last~0.offset)))) (= (let ((.cse5 (store .cse6 .cse1 (store (select .cse6 .cse1) .cse4 sll_insert_~new_node~0.base)))) (store .cse5 sll_insert_~new_node~0.base (store (select .cse5 sll_insert_~new_node~0.base) .cse3 sll_insert_~last~0.base))) |c_#memory_$Pointer$.base|)))))) (<= (+ sll_insert_~new_node~0.base 1) |c_#StackHeapBarrier|))) is different from true [2021-11-19 04:56:54,460 INFO L354 Elim1Store]: treesize reduction 938, result has 17.8 percent of original size [2021-11-19 04:56:54,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 2072 treesize of output 1572 [2021-11-19 04:56:55,871 INFO L354 Elim1Store]: treesize reduction 958, result has 19.7 percent of original size [2021-11-19 04:56:55,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 2169 treesize of output 1706 [2021-11-19 04:58:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:58:24,074 INFO L354 Elim1Store]: treesize reduction 90, result has 85.1 percent of original size [2021-11-19 04:58:24,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 1508 treesize of output 1920 [2021-11-19 04:58:24,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:58:25,746 INFO L354 Elim1Store]: treesize reduction 90, result has 85.1 percent of original size [2021-11-19 04:58:25,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 1920 treesize of output 2318