./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.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_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/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_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/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_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:24:49,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:24:49,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:24:49,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:24:49,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:24:49,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:24:49,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:24:49,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:24:49,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:24:49,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:24:49,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:24:49,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:24:49,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:24:49,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:24:49,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:24:49,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:24:49,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:24:49,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:24:49,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:24:49,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:24:49,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:24:49,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:24:49,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:24:49,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:24:49,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:24:49,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:24:49,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:24:49,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:24:49,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:24:49,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:24:49,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:24:49,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:24:49,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:24:49,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:24:49,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:24:49,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:24:49,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:24:49,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:24:49,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:24:49,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:24:49,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:24:49,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 05:24:50,003 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:24:50,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:24:50,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:24:50,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:24:50,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:24:50,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:24:50,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:24:50,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:24:50,007 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:24:50,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:24:50,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:24:50,009 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 05:24:50,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:24:50,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:24:50,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:24:50,010 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 05:24:50,010 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 05:24:50,011 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 05:24:50,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:24:50,011 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 05:24:50,012 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:24:50,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:24:50,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:24:50,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:24:50,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:24:50,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:24:50,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:24:50,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:24:50,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:24:50,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:24:50,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:24:50,015 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_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2021-11-19 05:24:50,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:24:50,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:24:50,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:24:50,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:24:50,323 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:24:50,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2021-11-19 05:24:50,407 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/data/04b461091/b9aba14d7f4646a1a700564179355c88/FLAGb2b337b5d [2021-11-19 05:24:50,954 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:24:50,955 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2021-11-19 05:24:50,969 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/data/04b461091/b9aba14d7f4646a1a700564179355c88/FLAGb2b337b5d [2021-11-19 05:24:51,279 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/data/04b461091/b9aba14d7f4646a1a700564179355c88 [2021-11-19 05:24:51,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:24:51,283 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 05:24:51,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:24:51,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:24:51,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:24:51,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcc9dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51, skipping insertion in model container [2021-11-19 05:24:51,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:24:51,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:24:51,684 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_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2021-11-19 05:24:51,691 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:24:51,711 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:24:51,758 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_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2021-11-19 05:24:51,759 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:24:51,797 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:24:51,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51 WrapperNode [2021-11-19 05:24:51,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:24:51,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:24:51,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:24:51,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:24:51,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:24:51,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:24:51,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:24:51,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:24:51,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (1/1) ... [2021-11-19 05:24:51,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:24:51,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:51,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:24:51,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:24:51,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 05:24:51,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:24:51,974 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 05:24:51,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 05:24:51,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 05:24:51,975 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-19 05:24:51,975 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-11-19 05:24:51,976 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-11-19 05:24:51,976 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-11-19 05:24:51,976 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2021-11-19 05:24:51,976 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-11-19 05:24:51,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 05:24:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 05:24:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 05:24:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-19 05:24:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-19 05:24:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 05:24:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:24:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 05:24:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 05:24:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 05:24:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 05:24:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 05:24:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 05:24:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 05:24:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 05:24:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 05:24:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 05:24:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 05:24:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 05:24:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 05:24:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 05:24:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 05:24:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 05:24:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 05:24:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 05:24:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 05:24:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 05:24:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 05:24:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 05:24:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 05:24:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 05:24:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 05:24:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 05:24:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 05:24:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 05:24:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 05:24:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 05:24:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 05:24:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 05:24:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 05:24:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 05:24:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 05:24:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 05:24:51,984 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 05:24:51,984 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 05:24:51,984 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 05:24:51,984 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 05:24:51,984 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 05:24:51,984 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 05:24:51,985 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 05:24:51,985 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 05:24:51,985 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 05:24:51,985 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 05:24:51,986 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 05:24:51,986 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 05:24:51,987 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 05:24:51,987 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 05:24:51,987 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 05:24:51,987 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 05:24:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 05:24:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 05:24:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 05:24:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 05:24:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 05:24:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-19 05:24:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 05:24:51,988 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 05:24:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 05:24:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 05:24:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 05:24:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 05:24:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 05:24:51,989 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 05:24:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 05:24:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 05:24:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 05:24:51,990 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 05:24:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 05:24:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 05:24:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 05:24:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 05:24:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 05:24:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 05:24:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 05:24:51,993 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 05:24:51,993 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 05:24:51,993 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 05:24:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 05:24:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 05:24:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 05:24:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 05:24:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 05:24:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 05:24:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 05:24:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 05:24:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 05:24:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-19 05:24:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-11-19 05:24:51,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:24:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 05:24:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-11-19 05:24:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 05:24:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-11-19 05:24:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:24:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2021-11-19 05:24:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-11-19 05:24:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 05:24:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:24:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 05:24:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 05:24:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:24:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:24:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:24:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:24:52,305 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:24:52,308 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:24:52,344 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-19 05:24:52,582 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:24:52,589 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:24:52,604 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-19 05:24:52,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:52 BoogieIcfgContainer [2021-11-19 05:24:52,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:24:52,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:24:52,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:24:52,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:24:52,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:51" (1/3) ... [2021-11-19 05:24:52,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9e53f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:52, skipping insertion in model container [2021-11-19 05:24:52,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:51" (2/3) ... [2021-11-19 05:24:52,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9e53f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:52, skipping insertion in model container [2021-11-19 05:24:52,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:52" (3/3) ... [2021-11-19 05:24:52,625 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2021-11-19 05:24:52,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:24:52,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-19 05:24:52,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:24:52,706 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 05:24:52,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-19 05:24:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 60 states have (on average 1.7) internal successors, (102), 86 states have internal predecessors, (102), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 05:24:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 05:24:52,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:52,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:52,733 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:24:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:52,765 INFO L85 PathProgramCache]: Analyzing trace with hash 843908537, now seen corresponding path program 1 times [2021-11-19 05:24:52,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:52,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114163517] [2021-11-19 05:24:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:52,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:52,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:24:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:52,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:24:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:52,998 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 05:24:52,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:52,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114163517] [2021-11-19 05:24:53,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114163517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:53,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:53,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:24:53,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651309343] [2021-11-19 05:24:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:53,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:24:53,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:24:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:53,051 INFO L87 Difference]: Start difference. First operand has 104 states, 60 states have (on average 1.7) internal successors, (102), 86 states have internal predecessors, (102), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:24:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:53,165 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2021-11-19 05:24:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:24:53,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-19 05:24:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:53,181 INFO L225 Difference]: With dead ends: 104 [2021-11-19 05:24:53,181 INFO L226 Difference]: Without dead ends: 97 [2021-11-19 05:24:53,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:24:53,187 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 92 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:53,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 111 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:24:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-19 05:24:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-19 05:24:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 81 states have internal predecessors, (89), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:24:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-11-19 05:24:53,234 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 18 [2021-11-19 05:24:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:53,234 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-11-19 05:24:53,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:24:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-11-19 05:24:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 05:24:53,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:53,237 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] [2021-11-19 05:24:53,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:24:53,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:24:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:53,238 INFO L85 PathProgramCache]: Analyzing trace with hash -410119184, now seen corresponding path program 1 times [2021-11-19 05:24:53,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:53,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379257105] [2021-11-19 05:24:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:53,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:53,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:24:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:24:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:53,356 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 05:24:53,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:53,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379257105] [2021-11-19 05:24:53,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379257105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:53,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:53,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:24:53,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436236264] [2021-11-19 05:24:53,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:53,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:24:53,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:24:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:24:53,361 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:24:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:53,596 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-11-19 05:24:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:24:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-19 05:24:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:53,602 INFO L225 Difference]: With dead ends: 101 [2021-11-19 05:24:53,602 INFO L226 Difference]: Without dead ends: 101 [2021-11-19 05:24:53,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 05:24:53,609 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 93 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:53,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 111 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:24:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-19 05:24:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-11-19 05:24:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.543859649122807) internal successors, (88), 80 states have internal predecessors, (88), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:24:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-11-19 05:24:53,632 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 20 [2021-11-19 05:24:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:53,634 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-11-19 05:24:53,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:24:53,634 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-11-19 05:24:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 05:24:53,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:53,635 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] [2021-11-19 05:24:53,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:24:53,635 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:24:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -410119183, now seen corresponding path program 1 times [2021-11-19 05:24:53,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:53,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019151850] [2021-11-19 05:24:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:53,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:53,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:24:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:53,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:24:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:53,916 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 05:24:53,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:53,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019151850] [2021-11-19 05:24:53,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019151850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:53,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:53,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 05:24:53,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703847068] [2021-11-19 05:24:53,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:53,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:24:53,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:24:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:24:53,921 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:24:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:54,399 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2021-11-19 05:24:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:24:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-19 05:24:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:54,404 INFO L225 Difference]: With dead ends: 115 [2021-11-19 05:24:54,404 INFO L226 Difference]: Without dead ends: 115 [2021-11-19 05:24:54,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:24:54,413 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 125 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:54,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 127 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:24:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-19 05:24:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2021-11-19 05:24:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.523076923076923) internal successors, (99), 88 states have internal predecessors, (99), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:24:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-11-19 05:24:54,439 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 20 [2021-11-19 05:24:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:54,439 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-11-19 05:24:54,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:24:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-11-19 05:24:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 05:24:54,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:54,441 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] [2021-11-19 05:24:54,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:24:54,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:24:54,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash -668284621, now seen corresponding path program 1 times [2021-11-19 05:24:54,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:54,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265368280] [2021-11-19 05:24:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:54,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:54,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:24:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:54,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:24:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:54,521 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 05:24:54,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:54,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265368280] [2021-11-19 05:24:54,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265368280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:54,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:54,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:24:54,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269345606] [2021-11-19 05:24:54,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:54,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:24:54,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:54,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:24:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:24:54,524 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:24:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:54,682 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-11-19 05:24:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:24:54,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-19 05:24:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:54,684 INFO L225 Difference]: With dead ends: 109 [2021-11-19 05:24:54,684 INFO L226 Difference]: Without dead ends: 109 [2021-11-19 05:24:54,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 05:24:54,685 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 91 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:54,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 111 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:24:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-19 05:24:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2021-11-19 05:24:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 87 states have internal predecessors, (98), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:24:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2021-11-19 05:24:54,705 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 20 [2021-11-19 05:24:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:54,705 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2021-11-19 05:24:54,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:24:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2021-11-19 05:24:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 05:24:54,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:54,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:54,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:24:54,708 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:24:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1389903957, now seen corresponding path program 1 times [2021-11-19 05:24:54,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:54,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004487009] [2021-11-19 05:24:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:54,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:54,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:24:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:54,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:24:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:54,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:24:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 05:24:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:24:54,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:54,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004487009] [2021-11-19 05:24:54,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004487009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:24:54,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862129380] [2021-11-19 05:24:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:54,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:54,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:54,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:54,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:24:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:24:55,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:55,104 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 05:24:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:55,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:24:55,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862129380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:55,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:24:55,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-11-19 05:24:55,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458576374] [2021-11-19 05:24:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:24:55,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:55,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:24:55,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:24:55,310 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:24:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:55,459 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2021-11-19 05:24:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:24:55,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2021-11-19 05:24:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:55,462 INFO L225 Difference]: With dead ends: 138 [2021-11-19 05:24:55,463 INFO L226 Difference]: Without dead ends: 138 [2021-11-19 05:24:55,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:24:55,464 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 45 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:55,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 221 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 109 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-11-19 05:24:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-19 05:24:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2021-11-19 05:24:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.4683544303797469) internal successors, (116), 100 states have internal predecessors, (116), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-19 05:24:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2021-11-19 05:24:55,473 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 33 [2021-11-19 05:24:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:55,474 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2021-11-19 05:24:55,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:24:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2021-11-19 05:24:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 05:24:55,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:55,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:55,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:55,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:55,689 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:24:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1389903958, now seen corresponding path program 1 times [2021-11-19 05:24:55,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:55,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191353012] [2021-11-19 05:24:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:55,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:55,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:24:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:24:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:24:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:55,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 05:24:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:24:55,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:55,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191353012] [2021-11-19 05:24:55,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191353012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:24:55,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523516034] [2021-11-19 05:24:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:55,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:55,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:55,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:24:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:24:55,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:56,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:24:56,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523516034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:56,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:24:56,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2021-11-19 05:24:56,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010644776] [2021-11-19 05:24:56,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:56,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:24:56,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:56,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:24:56,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:24:56,149 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 05:24:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:56,230 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-11-19 05:24:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:24:56,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-11-19 05:24:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:56,232 INFO L225 Difference]: With dead ends: 108 [2021-11-19 05:24:56,233 INFO L226 Difference]: Without dead ends: 105 [2021-11-19 05:24:56,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:24:56,235 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 20 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:56,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 691 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:24:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-19 05:24:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-19 05:24:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 88 states have internal predecessors, (99), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:24:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-11-19 05:24:56,241 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 33 [2021-11-19 05:24:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:56,244 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-11-19 05:24:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 05:24:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-11-19 05:24:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 05:24:56,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:56,253 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 05:24:56,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:56,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:56,468 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:24:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash 5712386, now seen corresponding path program 1 times [2021-11-19 05:24:56,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:56,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238029329] [2021-11-19 05:24:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:56,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:56,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:24:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:56,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:24:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:56,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:24:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:56,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 05:24:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:24:56,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:56,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238029329] [2021-11-19 05:24:56,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238029329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:24:56,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827074870] [2021-11-19 05:24:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:56,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:56,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:56,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:56,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:24:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:56,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:24:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:56,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:24:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:24:57,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827074870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:24:57,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:24:57,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2021-11-19 05:24:57,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373287465] [2021-11-19 05:24:57,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:24:57,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 05:24:57,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:57,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 05:24:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-19 05:24:57,354 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 23 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:24:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:58,920 INFO L93 Difference]: Finished difference Result 166 states and 194 transitions. [2021-11-19 05:24:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:24:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 38 [2021-11-19 05:24:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:58,922 INFO L225 Difference]: With dead ends: 166 [2021-11-19 05:24:58,922 INFO L226 Difference]: Without dead ends: 157 [2021-11-19 05:24:58,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 05:24:58,924 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 244 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:58,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 210 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 05:24:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-19 05:24:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-11-19 05:24:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 93 states have internal predecessors, (103), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:24:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-11-19 05:24:58,938 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 38 [2021-11-19 05:24:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:58,938 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-11-19 05:24:58,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:24:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-11-19 05:24:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 05:24:58,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:58,941 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:58,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:59,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:59,157 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:24:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -772258699, now seen corresponding path program 2 times [2021-11-19 05:24:59,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:59,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112545736] [2021-11-19 05:24:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:59,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:59,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:24:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:59,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:24:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:59,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:24:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:59,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:24:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:24:59,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:59,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112545736] [2021-11-19 05:24:59,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112545736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:24:59,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056240567] [2021-11-19 05:24:59,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:24:59,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:59,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:59,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:24:59,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:24:59,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:24:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:24:59,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:24:59,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 05:25:00,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056240567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:00,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:25:00,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2021-11-19 05:25:00,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219066947] [2021-11-19 05:25:00,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:00,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 05:25:00,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 05:25:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:25:00,070 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 05:25:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:01,864 INFO L93 Difference]: Finished difference Result 167 states and 196 transitions. [2021-11-19 05:25:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:25:01,865 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2021-11-19 05:25:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:01,868 INFO L225 Difference]: With dead ends: 167 [2021-11-19 05:25:01,868 INFO L226 Difference]: Without dead ends: 167 [2021-11-19 05:25:01,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=376, Invalid=1604, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 05:25:01,870 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 321 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:01,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 168 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 05:25:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-19 05:25:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2021-11-19 05:25:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 79 states have (on average 1.4303797468354431) internal successors, (113), 101 states have internal predecessors, (113), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 05:25:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2021-11-19 05:25:01,884 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 43 [2021-11-19 05:25:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:01,884 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2021-11-19 05:25:01,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 05:25:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2021-11-19 05:25:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 05:25:01,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:01,887 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:01,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:02,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 05:25:02,110 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash 37087927, now seen corresponding path program 1 times [2021-11-19 05:25:02,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:02,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801698253] [2021-11-19 05:25:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:02,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:02,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:02,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:02,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:25:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:25:02,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:02,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801698253] [2021-11-19 05:25:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801698253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:02,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437140125] [2021-11-19 05:25:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:02,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:02,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:02,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:25:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:25:02,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:02,549 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 05:25:02,581 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 05:25:02,933 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-19 05:25:02,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 31 [2021-11-19 05:25:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:03,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:03,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437140125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:03,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:03,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-11-19 05:25:03,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689045429] [2021-11-19 05:25:03,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:03,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:25:03,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:25:03,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:25:03,383 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:25:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:04,156 INFO L93 Difference]: Finished difference Result 209 states and 243 transitions. [2021-11-19 05:25:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:25:04,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-11-19 05:25:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:04,159 INFO L225 Difference]: With dead ends: 209 [2021-11-19 05:25:04,159 INFO L226 Difference]: Without dead ends: 203 [2021-11-19 05:25:04,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:25:04,160 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 268 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:04,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 263 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 580 Invalid, 0 Unknown, 298 Unchecked, 0.5s Time] [2021-11-19 05:25:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-19 05:25:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 149. [2021-11-19 05:25:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 105 states have (on average 1.4) internal successors, (147), 128 states have internal predecessors, (147), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-19 05:25:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2021-11-19 05:25:04,168 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 43 [2021-11-19 05:25:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:04,168 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2021-11-19 05:25:04,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:25:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2021-11-19 05:25:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 05:25:04,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:04,169 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:04,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:04,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:04,370 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash 37087928, now seen corresponding path program 1 times [2021-11-19 05:25:04,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:04,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570430505] [2021-11-19 05:25:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:04,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:25:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:25:04,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:04,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570430505] [2021-11-19 05:25:04,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570430505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:04,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032551894] [2021-11-19 05:25:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:04,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:04,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:04,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:04,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:25:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 05:25:04,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:04,811 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 05:25:04,837 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 05:25:05,161 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-19 05:25:05,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-19 05:25:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:05,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:07,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032551894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:07,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:07,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2021-11-19 05:25:07,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734005148] [2021-11-19 05:25:07,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:07,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 05:25:07,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 05:25:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-11-19 05:25:07,698 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-19 05:25:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:08,571 INFO L93 Difference]: Finished difference Result 207 states and 236 transitions. [2021-11-19 05:25:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:25:08,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-11-19 05:25:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:08,574 INFO L225 Difference]: With dead ends: 207 [2021-11-19 05:25:08,574 INFO L226 Difference]: Without dead ends: 207 [2021-11-19 05:25:08,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=130, Invalid=571, Unknown=1, NotChecked=0, Total=702 [2021-11-19 05:25:08,575 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 269 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:08,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 288 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 754 Invalid, 0 Unknown, 477 Unchecked, 0.6s Time] [2021-11-19 05:25:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-19 05:25:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 149. [2021-11-19 05:25:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 105 states have (on average 1.3904761904761904) internal successors, (146), 128 states have internal predecessors, (146), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-19 05:25:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-11-19 05:25:08,582 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 43 [2021-11-19 05:25:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:08,583 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-11-19 05:25:08,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-19 05:25:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-11-19 05:25:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 05:25:08,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:08,584 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:08,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:08,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 05:25:08,813 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:08,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:08,813 INFO L85 PathProgramCache]: Analyzing trace with hash -879324438, now seen corresponding path program 1 times [2021-11-19 05:25:08,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:08,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014147586] [2021-11-19 05:25:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:08,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:08,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:08,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:25:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:25:09,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:09,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014147586] [2021-11-19 05:25:09,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014147586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:09,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:09,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 05:25:09,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033606655] [2021-11-19 05:25:09,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:09,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:25:09,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:25:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:25:09,014 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:25:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:09,695 INFO L93 Difference]: Finished difference Result 192 states and 219 transitions. [2021-11-19 05:25:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 05:25:09,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-11-19 05:25:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:09,697 INFO L225 Difference]: With dead ends: 192 [2021-11-19 05:25:09,697 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 05:25:09,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-19 05:25:09,698 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 210 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:09,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 96 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:25:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 05:25:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 160. [2021-11-19 05:25:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 114 states have (on average 1.4210526315789473) internal successors, (162), 138 states have internal predecessors, (162), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 05:25:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2021-11-19 05:25:09,706 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 47 [2021-11-19 05:25:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:09,706 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2021-11-19 05:25:09,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:25:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2021-11-19 05:25:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 05:25:09,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:09,707 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:09,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 05:25:09,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash -879324437, now seen corresponding path program 1 times [2021-11-19 05:25:09,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:09,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707350808] [2021-11-19 05:25:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:09,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:09,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:09,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:09,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:09,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:25:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 05:25:09,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:09,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707350808] [2021-11-19 05:25:09,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707350808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:09,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:09,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 05:25:09,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116461969] [2021-11-19 05:25:09,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:09,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:25:09,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:09,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:25:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:25:09,886 INFO L87 Difference]: Start difference. First operand 160 states and 187 transitions. Second operand has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:25:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:10,654 INFO L93 Difference]: Finished difference Result 192 states and 219 transitions. [2021-11-19 05:25:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:25:10,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2021-11-19 05:25:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:10,656 INFO L225 Difference]: With dead ends: 192 [2021-11-19 05:25:10,656 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 05:25:10,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:25:10,657 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 208 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:10,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 96 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 05:25:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 05:25:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 160. [2021-11-19 05:25:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 114 states have (on average 1.412280701754386) internal successors, (161), 138 states have internal predecessors, (161), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 05:25:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2021-11-19 05:25:10,666 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 47 [2021-11-19 05:25:10,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:10,666 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2021-11-19 05:25:10,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:25:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2021-11-19 05:25:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 05:25:10,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:10,668 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:10,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 05:25:10,668 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash 796024868, now seen corresponding path program 2 times [2021-11-19 05:25:10,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:10,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657581412] [2021-11-19 05:25:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:10,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:10,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:10,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:10,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:10,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-19 05:25:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:25:10,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:10,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657581412] [2021-11-19 05:25:10,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657581412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:10,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098600709] [2021-11-19 05:25:10,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:25:10,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:10,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:10,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:10,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:25:10,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:25:10,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:25:10,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 05:25:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:11,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:25:11,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098600709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:11,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:25:11,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 25 [2021-11-19 05:25:11,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213421433] [2021-11-19 05:25:11,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:11,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 05:25:11,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 05:25:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:25:11,576 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand has 25 states, 23 states have (on average 3.260869565217391) internal successors, (75), 21 states have internal predecessors, (75), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:25:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:12,827 INFO L93 Difference]: Finished difference Result 222 states and 267 transitions. [2021-11-19 05:25:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 05:25:12,828 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.260869565217391) internal successors, (75), 21 states have internal predecessors, (75), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 48 [2021-11-19 05:25:12,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:12,830 INFO L225 Difference]: With dead ends: 222 [2021-11-19 05:25:12,830 INFO L226 Difference]: Without dead ends: 222 [2021-11-19 05:25:12,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 05:25:12,832 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 222 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:12,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 185 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:25:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-19 05:25:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 166. [2021-11-19 05:25:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 118 states have (on average 1.4067796610169492) internal successors, (166), 143 states have internal predecessors, (166), 13 states have call successors, (13), 11 states have call predecessors, (13), 13 states have return successors, (15), 11 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 05:25:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 194 transitions. [2021-11-19 05:25:12,841 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 194 transitions. Word has length 48 [2021-11-19 05:25:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:12,841 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 194 transitions. [2021-11-19 05:25:12,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.260869565217391) internal successors, (75), 21 states have internal predecessors, (75), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:25:12,842 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 194 transitions. [2021-11-19 05:25:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 05:25:12,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:12,843 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:12,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:13,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 05:25:13,057 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash -948773428, now seen corresponding path program 1 times [2021-11-19 05:25:13,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:13,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712631490] [2021-11-19 05:25:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:13,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:13,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:13,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:13,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:13,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:25:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:25:13,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:13,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712631490] [2021-11-19 05:25:13,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712631490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:13,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031331463] [2021-11-19 05:25:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:13,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:13,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:13,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:13,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:25:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:13,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 05:25:13,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:13,453 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 05:25:13,480 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:25:13,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-19 05:25:13,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-19 05:25:13,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-11-19 05:25:14,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:25:14,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2021-11-19 05:25:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:14,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:14,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-19 05:25:14,586 INFO L354 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2021-11-19 05:25:14,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 107 [2021-11-19 05:25:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:25:14,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031331463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:14,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:25:14,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 30 [2021-11-19 05:25:14,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179985606] [2021-11-19 05:25:14,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:14,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 05:25:14,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 05:25:14,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-11-19 05:25:14,778 INFO L87 Difference]: Start difference. First operand 166 states and 194 transitions. Second operand has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 05:25:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:15,909 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2021-11-19 05:25:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:25:15,910 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2021-11-19 05:25:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:15,912 INFO L225 Difference]: With dead ends: 208 [2021-11-19 05:25:15,912 INFO L226 Difference]: Without dead ends: 202 [2021-11-19 05:25:15,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 05:25:15,913 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 177 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1011 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:15,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 258 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1511 Invalid, 0 Unknown, 1011 Unchecked, 0.8s Time] [2021-11-19 05:25:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-19 05:25:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 162. [2021-11-19 05:25:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 116 states have (on average 1.4051724137931034) internal successors, (163), 139 states have internal predecessors, (163), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 05:25:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-11-19 05:25:15,924 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 50 [2021-11-19 05:25:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:15,925 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-11-19 05:25:15,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 24 states have internal predecessors, (69), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 05:25:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-11-19 05:25:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 05:25:15,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:15,926 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:15,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:16,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:16,141 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash -948773427, now seen corresponding path program 1 times [2021-11-19 05:25:16,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:16,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464678445] [2021-11-19 05:25:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:16,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:16,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:16,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:16,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:16,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:25:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:25:16,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:16,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464678445] [2021-11-19 05:25:16,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464678445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:16,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570070632] [2021-11-19 05:25:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:16,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:16,451 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:16,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:25:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:16,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 05:25:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:16,617 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 05:25:16,738 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:25:16,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-19 05:25:16,763 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:25:16,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-19 05:25:16,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:25:16,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:25:17,841 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-19 05:25:17,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 58 [2021-11-19 05:25:17,856 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-19 05:25:17,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 39 [2021-11-19 05:25:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:18,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:18,988 INFO L354 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2021-11-19 05:25:18,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 402 treesize of output 377 [2021-11-19 05:25:19,105 INFO L354 Elim1Store]: treesize reduction 33, result has 66.7 percent of original size [2021-11-19 05:25:19,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 856 treesize of output 781 [2021-11-19 05:25:25,197 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 38 treesize of output 34 [2021-11-19 05:25:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:25:25,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570070632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:25,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:25:25,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 44 [2021-11-19 05:25:25,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147064469] [2021-11-19 05:25:25,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:25,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 05:25:25,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:25,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 05:25:25,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 05:25:25,359 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 45 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 37 states have internal predecessors, (88), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:25:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:27,774 INFO L93 Difference]: Finished difference Result 222 states and 262 transitions. [2021-11-19 05:25:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:25:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 37 states have internal predecessors, (88), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-11-19 05:25:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:27,777 INFO L225 Difference]: With dead ends: 222 [2021-11-19 05:25:27,777 INFO L226 Difference]: Without dead ends: 222 [2021-11-19 05:25:27,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=389, Invalid=4303, Unknown=0, NotChecked=0, Total=4692 [2021-11-19 05:25:27,780 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 217 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1299 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:27,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 320 Invalid, 3193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1822 Invalid, 0 Unknown, 1299 Unchecked, 1.1s Time] [2021-11-19 05:25:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-19 05:25:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 162. [2021-11-19 05:25:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 116 states have (on average 1.396551724137931) internal successors, (162), 139 states have internal predecessors, (162), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 05:25:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2021-11-19 05:25:27,788 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 50 [2021-11-19 05:25:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:27,788 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2021-11-19 05:25:27,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 37 states have internal predecessors, (88), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:25:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2021-11-19 05:25:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 05:25:27,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:27,790 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:27,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:28,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 05:25:28,003 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:28,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1491815423, now seen corresponding path program 1 times [2021-11-19 05:25:28,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:28,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391608987] [2021-11-19 05:25:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:28,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:25:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 05:25:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 05:25:28,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:28,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391608987] [2021-11-19 05:25:28,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391608987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:28,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:28,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 05:25:28,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355392910] [2021-11-19 05:25:28,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:28,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:25:28,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:25:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:25:28,194 INFO L87 Difference]: Start difference. First operand 162 states and 187 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 05:25:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:28,802 INFO L93 Difference]: Finished difference Result 199 states and 227 transitions. [2021-11-19 05:25:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:25:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2021-11-19 05:25:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:28,804 INFO L225 Difference]: With dead ends: 199 [2021-11-19 05:25:28,804 INFO L226 Difference]: Without dead ends: 196 [2021-11-19 05:25:28,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:25:28,805 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 178 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:28,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 147 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:25:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-19 05:25:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 162. [2021-11-19 05:25:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 116 states have (on average 1.3879310344827587) internal successors, (161), 139 states have internal predecessors, (161), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 05:25:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2021-11-19 05:25:28,813 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 52 [2021-11-19 05:25:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:28,814 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2021-11-19 05:25:28,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 05:25:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2021-11-19 05:25:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:25:28,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:28,815 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:28,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 05:25:28,815 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1261723085, now seen corresponding path program 1 times [2021-11-19 05:25:28,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:28,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200913680] [2021-11-19 05:25:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:28,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:25:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 05:25:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 05:25:28,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:28,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200913680] [2021-11-19 05:25:28,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200913680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:28,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279358035] [2021-11-19 05:25:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:28,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:28,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:28,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:28,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:25:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:29,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:25:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 05:25:29,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 05:25:29,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279358035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:29,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:25:29,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2021-11-19 05:25:29,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693571389] [2021-11-19 05:25:29,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:29,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 05:25:29,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 05:25:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:25:29,501 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 05:25:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:30,766 INFO L93 Difference]: Finished difference Result 325 states and 395 transitions. [2021-11-19 05:25:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:25:30,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-11-19 05:25:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:30,768 INFO L225 Difference]: With dead ends: 325 [2021-11-19 05:25:30,768 INFO L226 Difference]: Without dead ends: 309 [2021-11-19 05:25:30,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=941, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:25:30,769 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 301 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:30,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 133 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:25:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-19 05:25:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 167. [2021-11-19 05:25:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 121 states have (on average 1.3801652892561984) internal successors, (167), 144 states have internal predecessors, (167), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 05:25:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2021-11-19 05:25:30,779 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 51 [2021-11-19 05:25:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:30,780 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2021-11-19 05:25:30,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 05:25:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2021-11-19 05:25:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:25:30,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:30,781 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:30,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 05:25:30,996 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1661436913, now seen corresponding path program 1 times [2021-11-19 05:25:30,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:30,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271006156] [2021-11-19 05:25:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:30,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:31,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:31,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:25:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:31,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 05:25:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:25:31,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:31,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271006156] [2021-11-19 05:25:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271006156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:31,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046772530] [2021-11-19 05:25:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:31,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:31,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:31,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:31,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:25:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 05:25:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:31,721 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 05:25:31,743 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 05:25:32,150 INFO L354 Elim1Store]: treesize reduction 97, result has 17.1 percent of original size [2021-11-19 05:25:32,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-11-19 05:25:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:25:32,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:32,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046772530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:32,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:32,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2021-11-19 05:25:32,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658521219] [2021-11-19 05:25:32,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:32,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:25:32,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:25:32,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:25:32,504 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand has 19 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:25:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:33,856 INFO L93 Difference]: Finished difference Result 221 states and 254 transitions. [2021-11-19 05:25:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 05:25:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2021-11-19 05:25:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:33,858 INFO L225 Difference]: With dead ends: 221 [2021-11-19 05:25:33,858 INFO L226 Difference]: Without dead ends: 221 [2021-11-19 05:25:33,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-11-19 05:25:33,859 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 170 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:33,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 228 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 654 Invalid, 0 Unknown, 571 Unchecked, 0.6s Time] [2021-11-19 05:25:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-19 05:25:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 189. [2021-11-19 05:25:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.3642857142857143) internal successors, (191), 163 states have internal predecessors, (191), 13 states have call successors, (13), 12 states have call predecessors, (13), 14 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 05:25:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 219 transitions. [2021-11-19 05:25:33,867 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 219 transitions. Word has length 51 [2021-11-19 05:25:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:33,867 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 219 transitions. [2021-11-19 05:25:33,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 05:25:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 219 transitions. [2021-11-19 05:25:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:25:33,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:33,868 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:33,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:34,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 05:25:34,068 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:34,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1661436912, now seen corresponding path program 1 times [2021-11-19 05:25:34,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:34,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709993669] [2021-11-19 05:25:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:34,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:34,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:34,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:34,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:25:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:34,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 05:25:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:25:34,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:34,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709993669] [2021-11-19 05:25:34,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709993669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:34,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964771952] [2021-11-19 05:25:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:34,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:34,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:34,534 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:34,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 05:25:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:25:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:34,663 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 05:25:34,688 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 05:25:35,129 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-11-19 05:25:35,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 34 [2021-11-19 05:25:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:25:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:39,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964771952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:39,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:39,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-11-19 05:25:39,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206811503] [2021-11-19 05:25:39,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:39,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:25:39,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:39,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:25:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=341, Unknown=2, NotChecked=0, Total=420 [2021-11-19 05:25:39,697 INFO L87 Difference]: Start difference. First operand 189 states and 219 transitions. Second operand has 19 states, 16 states have (on average 4.0625) internal successors, (65), 17 states have internal predecessors, (65), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-19 05:25:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:40,583 INFO L93 Difference]: Finished difference Result 210 states and 242 transitions. [2021-11-19 05:25:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:25:40,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.0625) internal successors, (65), 17 states have internal predecessors, (65), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2021-11-19 05:25:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:40,586 INFO L225 Difference]: With dead ends: 210 [2021-11-19 05:25:40,586 INFO L226 Difference]: Without dead ends: 210 [2021-11-19 05:25:40,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=140, Invalid=614, Unknown=2, NotChecked=0, Total=756 [2021-11-19 05:25:40,587 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 250 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:40,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 190 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 652 Invalid, 0 Unknown, 519 Unchecked, 0.5s Time] [2021-11-19 05:25:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-19 05:25:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 175. [2021-11-19 05:25:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 128 states have (on average 1.3671875) internal successors, (175), 152 states have internal predecessors, (175), 12 states have call successors, (12), 11 states have call predecessors, (12), 13 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-19 05:25:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2021-11-19 05:25:40,594 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 51 [2021-11-19 05:25:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:40,594 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2021-11-19 05:25:40,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.0625) internal successors, (65), 17 states have internal predecessors, (65), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-19 05:25:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2021-11-19 05:25:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 05:25:40,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:40,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:40,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:40,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:40,801 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2021-11-19 05:25:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash 270602154, now seen corresponding path program 2 times [2021-11-19 05:25:40,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:40,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405011458] [2021-11-19 05:25:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:40,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:40,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:25:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:40,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:25:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:40,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:25:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:41,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:25:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:25:41,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:41,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405011458] [2021-11-19 05:25:41,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405011458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:41,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230302535] [2021-11-19 05:25:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:25:41,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:41,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:41,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:41,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb56bc2f-6eb3-4130-ad92-4db1c98f390c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 05:25:41,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:25:41,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:25:41,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 05:25:41,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:41,380 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 05:25:41,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:25:41,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 05:25:41,538 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:25:41,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-19 05:25:41,600 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-19 05:25:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-11-19 05:25:41,608 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-19 05:25:41,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-19 05:25:42,611 INFO L354 Elim1Store]: treesize reduction 101, result has 21.7 percent of original size [2021-11-19 05:25:42,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 94 [2021-11-19 05:25:42,663 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-11-19 05:25:42,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 53 [2021-11-19 05:25:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:42,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:45,318 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#s~0.base| Int) (|main_~#s~0.offset| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| c_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_sll_create_~new_head~0.base) c_sll_create_~new_head~0.offset c_sll_create_~head~0.base))) (.cse3 (store |c_#memory_$Pointer$.offset| c_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| c_sll_create_~new_head~0.base) c_sll_create_~new_head~0.offset c_sll_create_~head~0.offset)))) (let ((.cse5 (select (select .cse3 |main_~#s~0.base|) |main_~#s~0.offset|)) (.cse4 (select (select .cse0 |main_~#s~0.base|) |main_~#s~0.offset|))) (or (let ((.cse1 (select (select .cse0 .cse4) .cse5)) (.cse2 (select (select .cse3 .cse4) .cse5))) (and (= (select (select .cse0 .cse1) .cse2) 0) (= 0 (select (select .cse3 .cse1) .cse2)))) (not (= c_sll_create_~new_head~0.offset .cse5)) (not (= c_sll_create_~new_head~0.base .cse4)))))) is different from false [2021-11-19 05:25:48,671 INFO L354 Elim1Store]: treesize reduction 3052, result has 38.8 percent of original size [2021-11-19 05:25:48,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 20666 treesize of output 18780 [2021-11-19 05:26:15,258 WARN L227 SmtUtils]: Spent 26.03s on a formula simplification. DAG size of input: 2369 DAG size of output: 956 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 05:26:15,262 INFO L354 Elim1Store]: treesize reduction 5175, result has 32.0 percent of original size [2021-11-19 05:26:15,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 39 select indices, 39 select index equivalence classes, 0 disjoint index pairs (out of 741 index pairs), introduced 48 new quantified variables, introduced 741 case distinctions, treesize of input 382843 treesize of output 341328 [2021-11-19 05:26:55,602 WARN L227 SmtUtils]: Spent 40.32s on a formula simplification. DAG size of input: 2994 DAG size of output: 2963 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 05:27:03,625 WARN L227 SmtUtils]: Spent 7.98s on a formula simplification that was a NOOP. DAG size: 2888 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)