./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer --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 13cb8f020c937b6a3b0b6c39b85904cffb8b3ba5 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 04:32:53,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:32:53,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:32:53,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:32:53,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:32:53,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:32:53,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:32:53,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:32:53,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:32:53,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:32:53,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:32:53,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:32:53,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:32:53,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:32:53,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:32:53,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:32:53,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:32:53,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:32:53,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:32:53,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:32:53,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:32:53,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:32:53,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:32:53,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:32:53,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:32:53,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:32:53,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:32:53,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:32:53,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:32:53,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:32:53,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:32:53,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:32:53,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:32:53,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:32:53,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:32:53,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:32:53,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:32:53,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:32:53,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:32:53,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:32:53,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:32:53,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 04:32:54,007 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:32:54,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:32:54,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:32:54,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:32:54,008 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:32:54,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:32:54,009 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:32:54,009 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 04:32:54,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:32:54,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:32:54,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:32:54,010 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 04:32:54,010 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 04:32:54,010 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 04:32:54,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:32:54,010 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 04:32:54,010 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 04:32:54,011 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:32:54,011 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:32:54,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:32:54,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:32:54,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:32:54,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:32:54,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:32:54,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:32:54,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:32:54,012 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 04:32:54,013 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 04:32:54,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 04:32:54,013 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer 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 -> 13cb8f020c937b6a3b0b6c39b85904cffb8b3ba5 [2019-11-20 04:32:54,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:32:54,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:32:54,165 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:32:54,166 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:32:54,167 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:32:54,167 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2019-11-20 04:32:54,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/data/75c1a54ce/fe2a183baac040fd8f9db6b67439bb2b/FLAGb97bb85fc [2019-11-20 04:32:54,735 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:32:54,735 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2019-11-20 04:32:54,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/data/75c1a54ce/fe2a183baac040fd8f9db6b67439bb2b/FLAGb97bb85fc [2019-11-20 04:32:55,023 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/data/75c1a54ce/fe2a183baac040fd8f9db6b67439bb2b [2019-11-20 04:32:55,025 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:32:55,026 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 04:32:55,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:32:55,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:32:55,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:32:55,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45912668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55, skipping insertion in model container [2019-11-20 04:32:55,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,040 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:32:55,073 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:32:55,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:32:55,421 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:32:55,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:32:55,515 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:32:55,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55 WrapperNode [2019-11-20 04:32:55,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:32:55,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:32:55,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:32:55,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:32:55,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (1/1) ... [2019-11-20 04:32:55,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:32:55,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:32:55,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:32:55,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:32:55,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:32:55,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 04:32:55,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:32:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 04:32:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 04:32:55,643 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 04:32:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 04:32:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-20 04:32:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_last [2019-11-20 04:32:55,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 04:32:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 04:32:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 04:32:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 04:32:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 04:32:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 04:32:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 04:32:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 04:32:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 04:32:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 04:32:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 04:32:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 04:32:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 04:32:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 04:32:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 04:32:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 04:32:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 04:32:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 04:32:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 04:32:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 04:32:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 04:32:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 04:32:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 04:32:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 04:32:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 04:32:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 04:32:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 04:32:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 04:32:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 04:32:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 04:32:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 04:32:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 04:32:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 04:32:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 04:32:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 04:32:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 04:32:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 04:32:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 04:32:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 04:32:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 04:32:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 04:32:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 04:32:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 04:32:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 04:32:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 04:32:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 04:32:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 04:32:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 04:32:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 04:32:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 04:32:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 04:32:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 04:32:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 04:32:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 04:32:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 04:32:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 04:32:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 04:32:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 04:32:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 04:32:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 04:32:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 04:32:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 04:32:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 04:32:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 04:32:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 04:32:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 04:32:55,664 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 04:32:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 04:32:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 04:32:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 04:32:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 04:32:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 04:32:55,665 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 04:32:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 04:32:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 04:32:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 04:32:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 04:32:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 04:32:55,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 04:32:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 04:32:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 04:32:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 04:32:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 04:32:55,667 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 04:32:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 04:32:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 04:32:55,668 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 04:32:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 04:32:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 04:32:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 04:32:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 04:32:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 04:32:55,669 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 04:32:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 04:32:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 04:32:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 04:32:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 04:32:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 04:32:55,670 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 04:32:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 04:32:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 04:32:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 04:32:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 04:32:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-20 04:32:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_last [2019-11-20 04:32:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 04:32:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 04:32:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 04:32:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 04:32:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 04:32:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 04:32:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:32:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 04:32:55,928 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 04:32:56,398 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:32:56,398 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 04:32:56,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:32:56 BoogieIcfgContainer [2019-11-20 04:32:56,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:32:56,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:32:56,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:32:56,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:32:56,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:32:55" (1/3) ... [2019-11-20 04:32:56,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce8fb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:32:56, skipping insertion in model container [2019-11-20 04:32:56,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:32:55" (2/3) ... [2019-11-20 04:32:56,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce8fb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:32:56, skipping insertion in model container [2019-11-20 04:32:56,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:32:56" (3/3) ... [2019-11-20 04:32:56,408 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2019-11-20 04:32:56,419 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:32:56,427 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 31 error locations. [2019-11-20 04:32:56,441 INFO L249 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2019-11-20 04:32:56,466 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:32:56,466 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 04:32:56,467 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:32:56,467 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:32:56,467 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:32:56,467 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:32:56,467 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:32:56,467 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:32:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2019-11-20 04:32:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 04:32:56,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:32:56,497 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:32:56,498 INFO L410 AbstractCegarLoop]: === Iteration 1 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 04:32:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:32:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2025219408, now seen corresponding path program 1 times [2019-11-20 04:32:56,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:32:56,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1663544077] [2019-11-20 04:32:56,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:32:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:32:56,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 04:32:56,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:32:56,852 INFO L377 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 [2019-11-20 04:32:56,852 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:32:56,864 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:32:56,864 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:32:56,864 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:32:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:32:56,875 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:32:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:32:56,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1663544077] [2019-11-20 04:32:56,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:32:56,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 04:32:56,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394759077] [2019-11-20 04:32:56,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 04:32:56,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:32:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 04:32:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:32:56,914 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 3 states. [2019-11-20 04:32:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:32:57,130 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2019-11-20 04:32:57,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:32:57,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 04:32:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:32:57,146 INFO L225 Difference]: With dead ends: 88 [2019-11-20 04:32:57,146 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 04:32:57,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:32:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 04:32:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-20 04:32:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-20 04:32:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2019-11-20 04:32:57,215 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 13 [2019-11-20 04:32:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:32:57,216 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2019-11-20 04:32:57,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 04:32:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2019-11-20 04:32:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 04:32:57,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:32:57,218 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:32:57,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:32:57,421 INFO L410 AbstractCegarLoop]: === Iteration 2 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 04:32:57,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:32:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2025219409, now seen corresponding path program 1 times [2019-11-20 04:32:57,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:32:57,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1970169551] [2019-11-20 04:32:57,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:32:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:32:57,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 04:32:57,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:32:57,704 INFO L377 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 [2019-11-20 04:32:57,704 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:32:57,715 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:32:57,716 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:32:57,716 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 04:32:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:32:57,731 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:32:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:32:57,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970169551] [2019-11-20 04:32:57,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:32:57,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 04:32:57,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716574816] [2019-11-20 04:32:57,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 04:32:57,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:32:57,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 04:32:57,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 04:32:57,801 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 4 states. [2019-11-20 04:32:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:32:58,152 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2019-11-20 04:32:58,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:32:58,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-20 04:32:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:32:58,156 INFO L225 Difference]: With dead ends: 79 [2019-11-20 04:32:58,156 INFO L226 Difference]: Without dead ends: 79 [2019-11-20 04:32:58,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 04:32:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-20 04:32:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-20 04:32:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 04:32:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2019-11-20 04:32:58,168 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 13 [2019-11-20 04:32:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:32:58,169 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2019-11-20 04:32:58,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 04:32:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2019-11-20 04:32:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 04:32:58,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:32:58,171 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:32:58,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:32:58,374 INFO L410 AbstractCegarLoop]: === Iteration 3 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 04:32:58,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:32:58,375 INFO L82 PathProgramCache]: Analyzing trace with hash -39903579, now seen corresponding path program 1 times [2019-11-20 04:32:58,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:32:58,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1361249155] [2019-11-20 04:32:58,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:32:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:32:58,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 04:32:58,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:32:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:32:58,662 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:32:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:32:58,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1361249155] [2019-11-20 04:32:58,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:32:58,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 04:32:58,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532320800] [2019-11-20 04:32:58,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 04:32:58,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:32:58,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 04:32:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:32:58,748 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 7 states. [2019-11-20 04:32:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:32:58,837 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2019-11-20 04:32:58,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:32:58,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-20 04:32:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:32:58,842 INFO L225 Difference]: With dead ends: 90 [2019-11-20 04:32:58,842 INFO L226 Difference]: Without dead ends: 87 [2019-11-20 04:32:58,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:32:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-20 04:32:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2019-11-20 04:32:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-20 04:32:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-11-20 04:32:58,859 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 15 [2019-11-20 04:32:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:32:58,859 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-11-20 04:32:58,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 04:32:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-11-20 04:32:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 04:32:58,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:32:58,861 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:32:59,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:32:59,066 INFO L410 AbstractCegarLoop]: === Iteration 4 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 04:32:59,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:32:59,066 INFO L82 PathProgramCache]: Analyzing trace with hash 123258323, now seen corresponding path program 1 times [2019-11-20 04:32:59,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:32:59,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1034075182] [2019-11-20 04:32:59,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:32:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:32:59,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:32:59,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:32:59,307 INFO L377 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 [2019-11-20 04:32:59,307 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:32:59,314 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:32:59,315 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:32:59,315 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:32:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:32:59,357 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:32:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:32:59,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1034075182] [2019-11-20 04:32:59,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:32:59,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 04:32:59,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032596492] [2019-11-20 04:32:59,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:32:59,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:32:59,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:32:59,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:32:59,455 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 6 states. [2019-11-20 04:32:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:32:59,839 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2019-11-20 04:32:59,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:32:59,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-20 04:32:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:32:59,849 INFO L225 Difference]: With dead ends: 80 [2019-11-20 04:32:59,850 INFO L226 Difference]: Without dead ends: 80 [2019-11-20 04:32:59,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:32:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-20 04:32:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-20 04:32:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 04:32:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2019-11-20 04:32:59,858 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 19 [2019-11-20 04:32:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:32:59,858 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2019-11-20 04:32:59,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:32:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2019-11-20 04:32:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 04:32:59,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:32:59,860 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:33:00,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:00,061 INFO L410 AbstractCegarLoop]: === Iteration 5 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 04:33:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:33:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash 123258324, now seen corresponding path program 1 times [2019-11-20 04:33:00,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:33:00,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1634751344] [2019-11-20 04:33:00,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:33:00,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 04:33:00,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:33:00,333 INFO L377 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 [2019-11-20 04:33:00,334 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:33:00,341 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:33:00,341 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:33:00,342 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 04:33:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:33:00,403 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:33:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:33:00,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1634751344] [2019-11-20 04:33:00,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:33:00,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 04:33:00,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906846001] [2019-11-20 04:33:00,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:33:00,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:33:00,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:33:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:33:00,864 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 10 states. [2019-11-20 04:33:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:33:01,620 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2019-11-20 04:33:01,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:33:01,621 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-20 04:33:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:33:01,623 INFO L225 Difference]: With dead ends: 79 [2019-11-20 04:33:01,623 INFO L226 Difference]: Without dead ends: 79 [2019-11-20 04:33:01,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:33:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-20 04:33:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-11-20 04:33:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-20 04:33:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2019-11-20 04:33:01,631 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 19 [2019-11-20 04:33:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:33:01,631 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2019-11-20 04:33:01,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:33:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2019-11-20 04:33:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 04:33:01,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:33:01,632 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:33:01,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:01,833 INFO L410 AbstractCegarLoop]: === Iteration 6 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 04:33:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:33:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash 39581350, now seen corresponding path program 1 times [2019-11-20 04:33:01,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:33:01,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1359770829] [2019-11-20 04:33:01,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:33:02,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 04:33:02,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:33:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:33:02,082 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:33:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:33:02,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1359770829] [2019-11-20 04:33:02,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:33:02,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-20 04:33:02,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782467833] [2019-11-20 04:33:02,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 04:33:02,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:33:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 04:33:02,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-20 04:33:02,245 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 9 states. [2019-11-20 04:33:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:33:02,495 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2019-11-20 04:33:02,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 04:33:02,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-11-20 04:33:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:33:02,497 INFO L225 Difference]: With dead ends: 92 [2019-11-20 04:33:02,497 INFO L226 Difference]: Without dead ends: 89 [2019-11-20 04:33:02,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:33:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-20 04:33:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2019-11-20 04:33:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-20 04:33:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-20 04:33:02,505 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 28 [2019-11-20 04:33:02,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:33:02,505 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-20 04:33:02,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 04:33:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-20 04:33:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-20 04:33:02,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:33:02,509 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:33:02,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:02,713 INFO L410 AbstractCegarLoop]: === Iteration 7 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 04:33:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:33:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1826887611, now seen corresponding path program 2 times [2019-11-20 04:33:02,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:33:02,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [144103094] [2019-11-20 04:33:02,714 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:02,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 04:33:02,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:33:02,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 04:33:02,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:33:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 04:33:02,907 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:33:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 04:33:02,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [144103094] [2019-11-20 04:33:02,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:33:02,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 04:33:02,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259663731] [2019-11-20 04:33:02,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:33:02,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:33:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:33:02,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:33:02,960 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 6 states. [2019-11-20 04:33:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:33:03,008 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2019-11-20 04:33:03,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:33:03,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-11-20 04:33:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:33:03,010 INFO L225 Difference]: With dead ends: 88 [2019-11-20 04:33:03,010 INFO L226 Difference]: Without dead ends: 88 [2019-11-20 04:33:03,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:33:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-20 04:33:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-20 04:33:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-20 04:33:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2019-11-20 04:33:03,020 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 41 [2019-11-20 04:33:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:33:03,021 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2019-11-20 04:33:03,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:33:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2019-11-20 04:33:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-20 04:33:03,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:33:03,023 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:33:03,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:03,235 INFO L410 AbstractCegarLoop]: === Iteration 8 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 04:33:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:33:03,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1002767796, now seen corresponding path program 1 times [2019-11-20 04:33:03,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:33:03,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [38580512] [2019-11-20 04:33:03,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e86f863d-b806-4896-9006-256481044997/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:33:03,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 04:33:03,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:33:03,571 INFO L377 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 [2019-11-20 04:33:03,571 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:33:03,574 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:33:03,574 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:33:03,574 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:33:03,900 INFO L343 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2019-11-20 04:33:03,901 INFO L377 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 22 treesize of output 49 [2019-11-20 04:33:03,902 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:33:03,928 INFO L567 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2019-11-20 04:33:03,929 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 04:33:03,929 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:20 [2019-11-20 04:33:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 04:33:04,081 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:33:23,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:33:23,551 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 04:33:23,555 INFO L168 Benchmark]: Toolchain (without parser) took 28528.58 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 238.6 MB). Free memory was 944.8 MB in the beginning and 913.8 MB in the end (delta: 31.0 MB). Peak memory consumption was 269.6 MB. Max. memory is 11.5 GB. [2019-11-20 04:33:23,555 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:33:23,556 INFO L168 Benchmark]: CACSL2BoogieTranslator took 489.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.7 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -203.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 04:33:23,556 INFO L168 Benchmark]: Boogie Preprocessor took 73.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:33:23,557 INFO L168 Benchmark]: RCFGBuilder took 809.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 68.0 MB). Peak memory consumption was 68.0 MB. Max. memory is 11.5 GB. [2019-11-20 04:33:23,558 INFO L168 Benchmark]: TraceAbstraction took 27152.74 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 913.8 MB in the end (delta: 166.5 MB). Peak memory consumption was 227.3 MB. Max. memory is 11.5 GB. [2019-11-20 04:33:23,561 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 489.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.7 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -203.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 809.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 68.0 MB). Peak memory consumption was 68.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 27152.74 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 913.8 MB in the end (delta: 166.5 MB). Peak memory consumption was 227.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...