./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_equal.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_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_equal.i -s /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 bf5697d8d4dca230b1a96a38440f1f7c3ecc8c95 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 06:47:02,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 06:47:02,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 06:47:02,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 06:47:02,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 06:47:02,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 06:47:02,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 06:47:02,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 06:47:02,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 06:47:02,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 06:47:02,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 06:47:02,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 06:47:02,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 06:47:02,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 06:47:02,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 06:47:02,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 06:47:02,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 06:47:02,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 06:47:02,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 06:47:02,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 06:47:02,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 06:47:02,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 06:47:02,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 06:47:02,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 06:47:02,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 06:47:02,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 06:47:02,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 06:47:02,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 06:47:02,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 06:47:02,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 06:47:02,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 06:47:02,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 06:47:02,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 06:47:02,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 06:47:02,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 06:47:02,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 06:47:02,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 06:47:02,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 06:47:02,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 06:47:02,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 06:47:02,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 06:47:02,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 06:47:02,983 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 06:47:02,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 06:47:02,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 06:47:02,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 06:47:02,985 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 06:47:02,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 06:47:02,986 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 06:47:02,986 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 06:47:02,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 06:47:02,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 06:47:02,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 06:47:02,987 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 06:47:02,987 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 06:47:02,987 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 06:47:02,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 06:47:02,988 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 06:47:02,988 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 06:47:02,988 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 06:47:02,988 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 06:47:02,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 06:47:02,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 06:47:02,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 06:47:02,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 06:47:02,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 06:47:02,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 06:47:02,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 06:47:02,990 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 06:47:02,990 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 06:47:02,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 06:47:02,991 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_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 -> bf5697d8d4dca230b1a96a38440f1f7c3ecc8c95 [2019-11-20 06:47:03,170 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 06:47:03,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 06:47:03,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 06:47:03,185 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 06:47:03,185 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 06:47:03,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2c_append_equal.i [2019-11-20 06:47:03,242 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/data/2d782133c/a5a25f963a88486cb6b6d5769cd1c0d2/FLAGff2f48980 [2019-11-20 06:47:03,720 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 06:47:03,720 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/sv-benchmarks/c/list-simple/sll2c_append_equal.i [2019-11-20 06:47:03,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/data/2d782133c/a5a25f963a88486cb6b6d5769cd1c0d2/FLAGff2f48980 [2019-11-20 06:47:03,754 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/bin/uautomizer/data/2d782133c/a5a25f963a88486cb6b6d5769cd1c0d2 [2019-11-20 06:47:03,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 06:47:03,758 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 06:47:03,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 06:47:03,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 06:47:03,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 06:47:03,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:47:03" (1/1) ... [2019-11-20 06:47:03,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@edcc8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:03, skipping insertion in model container [2019-11-20 06:47:03,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:47:03" (1/1) ... [2019-11-20 06:47:03,770 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 06:47:03,825 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 06:47:04,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 06:47:04,241 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 06:47:04,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 06:47:04,347 INFO L192 MainTranslator]: Completed translation [2019-11-20 06:47:04,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04 WrapperNode [2019-11-20 06:47:04,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 06:47:04,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 06:47:04,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 06:47:04,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 06:47:04,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (1/1) ... [2019-11-20 06:47:04,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (1/1) ... [2019-11-20 06:47:04,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (1/1) ... [2019-11-20 06:47:04,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (1/1) ... [2019-11-20 06:47:04,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (1/1) ... [2019-11-20 06:47:04,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (1/1) ... [2019-11-20 06:47:04,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (1/1) ... [2019-11-20 06:47:04,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 06:47:04,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 06:47:04,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 06:47:04,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 06:47:04,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:47:04,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 06:47:04,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 06:47:04,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 06:47:04,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 06:47:04,484 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 06:47:04,484 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 06:47:04,485 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2019-11-20 06:47:04,486 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_destroy [2019-11-20 06:47:04,486 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_append [2019-11-20 06:47:04,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 06:47:04,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 06:47:04,487 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 06:47:04,487 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 06:47:04,488 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 06:47:04,488 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 06:47:04,489 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 06:47:04,489 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 06:47:04,489 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 06:47:04,489 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 06:47:04,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 06:47:04,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 06:47:04,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 06:47:04,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 06:47:04,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 06:47:04,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 06:47:04,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 06:47:04,492 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 06:47:04,492 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 06:47:04,492 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 06:47:04,492 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 06:47:04,492 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 06:47:04,493 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 06:47:04,493 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 06:47:04,493 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 06:47:04,493 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 06:47:04,493 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 06:47:04,493 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 06:47:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 06:47:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 06:47:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 06:47:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 06:47:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 06:47:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 06:47:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 06:47:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 06:47:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 06:47:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 06:47:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 06:47:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 06:47:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 06:47:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 06:47:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 06:47:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 06:47:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 06:47:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 06:47:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 06:47:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 06:47:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 06:47:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 06:47:04,498 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 06:47:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 06:47:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 06:47:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 06:47:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 06:47:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 06:47:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 06:47:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 06:47:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 06:47:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 06:47:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 06:47:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 06:47:04,503 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 06:47:04,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 06:47:04,504 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 06:47:04,505 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 06:47:04,505 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 06:47:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 06:47:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 06:47:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 06:47:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 06:47:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 06:47:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 06:47:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 06:47:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 06:47:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 06:47:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 06:47:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 06:47:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 06:47:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 06:47:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 06:47:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 06:47:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 06:47:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 06:47:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 06:47:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 06:47:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 06:47:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 06:47:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 06:47:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 06:47:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 06:47:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 06:47:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 06:47:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 06:47:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 06:47:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 06:47:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 06:47:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 06:47:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 06:47:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 06:47:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 06:47:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 06:47:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 06:47:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 06:47:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 06:47:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 06:47:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 06:47:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 06:47:04,515 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 06:47:04,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 06:47:04,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 06:47:04,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 06:47:04,516 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2019-11-20 06:47:04,516 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_destroy [2019-11-20 06:47:04,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 06:47:04,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 06:47:04,517 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_append [2019-11-20 06:47:04,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 06:47:04,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 06:47:04,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 06:47:04,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 06:47:04,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 06:47:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 06:47:04,940 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 06:47:05,541 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 06:47:05,541 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 06:47:05,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:47:05 BoogieIcfgContainer [2019-11-20 06:47:05,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 06:47:05,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 06:47:05,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 06:47:05,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 06:47:05,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:47:03" (1/3) ... [2019-11-20 06:47:05,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b91ae8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:47:05, skipping insertion in model container [2019-11-20 06:47:05,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:04" (2/3) ... [2019-11-20 06:47:05,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b91ae8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:47:05, skipping insertion in model container [2019-11-20 06:47:05,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:47:05" (3/3) ... [2019-11-20 06:47:05,561 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_append_equal.i [2019-11-20 06:47:05,578 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 06:47:05,587 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 49 error locations. [2019-11-20 06:47:05,598 INFO L249 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2019-11-20 06:47:05,619 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 06:47:05,619 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 06:47:05,620 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 06:47:05,620 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 06:47:05,620 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 06:47:05,620 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 06:47:05,620 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 06:47:05,622 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 06:47:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states. [2019-11-20 06:47:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 06:47:05,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:47:05,666 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:47:05,671 INFO L410 AbstractCegarLoop]: === Iteration 1 === [sll_circular_appendErr19REQUIRES_VIOLATION, sll_circular_appendErr8REQUIRES_VIOLATION, sll_circular_appendErr18REQUIRES_VIOLATION, sll_circular_appendErr9REQUIRES_VIOLATION, sll_circular_appendErr0REQUIRES_VIOLATION, sll_circular_appendErr11REQUIRES_VIOLATION, sll_circular_appendErr10REQUIRES_VIOLATION, sll_circular_appendErr12REQUIRES_VIOLATION, sll_circular_appendErr1REQUIRES_VIOLATION, sll_circular_appendErr3REQUIRES_VIOLATION, sll_circular_appendErr13REQUIRES_VIOLATION, sll_circular_appendErr2REQUIRES_VIOLATION, sll_circular_appendErr15REQUIRES_VIOLATION, sll_circular_appendErr4REQUIRES_VIOLATION, sll_circular_appendErr14REQUIRES_VIOLATION, sll_circular_appendErr16REQUIRES_VIOLATION, sll_circular_appendErr5REQUIRES_VIOLATION, sll_circular_appendErr7REQUIRES_VIOLATION, sll_circular_appendErr17REQUIRES_VIOLATION, sll_circular_appendErr6REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr2REQUIRES_VIOLATION, sll_circular_destroyErr3REQUIRES_VIOLATION, sll_circular_destroyErr1REQUIRES_VIOLATION, sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr0REQUIRES_VIOLATION, sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 06:47:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:47:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash 823163794, now seen corresponding path program 1 times [2019-11-20 06:47:05,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:47:05,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [195922449] [2019-11-20 06:47:05,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:47:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:47:05,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 06:47:05,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:47:05,960 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 06:47:05,961 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:05,968 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:05,968 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:47:05,969 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 06:47:05,978 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 06:47:05,978 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:47:05,990 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 06:47:05,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [195922449] [2019-11-20 06:47:05,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:47:05,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 06:47:05,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412853090] [2019-11-20 06:47:05,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 06:47:05,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:47:06,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 06:47:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 06:47:06,015 INFO L87 Difference]: Start difference. First operand 132 states. Second operand 3 states. [2019-11-20 06:47:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:47:06,277 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2019-11-20 06:47:06,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 06:47:06,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 06:47:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:47:06,290 INFO L225 Difference]: With dead ends: 130 [2019-11-20 06:47:06,291 INFO L226 Difference]: Without dead ends: 123 [2019-11-20 06:47:06,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 06:47:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-20 06:47:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2019-11-20 06:47:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-20 06:47:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2019-11-20 06:47:06,332 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 12 [2019-11-20 06:47:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:47:06,333 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2019-11-20 06:47:06,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 06:47:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2019-11-20 06:47:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 06:47:06,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:47:06,333 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:47:06,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:47:06,536 INFO L410 AbstractCegarLoop]: === Iteration 2 === [sll_circular_appendErr19REQUIRES_VIOLATION, sll_circular_appendErr8REQUIRES_VIOLATION, sll_circular_appendErr18REQUIRES_VIOLATION, sll_circular_appendErr9REQUIRES_VIOLATION, sll_circular_appendErr0REQUIRES_VIOLATION, sll_circular_appendErr11REQUIRES_VIOLATION, sll_circular_appendErr10REQUIRES_VIOLATION, sll_circular_appendErr12REQUIRES_VIOLATION, sll_circular_appendErr1REQUIRES_VIOLATION, sll_circular_appendErr3REQUIRES_VIOLATION, sll_circular_appendErr13REQUIRES_VIOLATION, sll_circular_appendErr2REQUIRES_VIOLATION, sll_circular_appendErr15REQUIRES_VIOLATION, sll_circular_appendErr4REQUIRES_VIOLATION, sll_circular_appendErr14REQUIRES_VIOLATION, sll_circular_appendErr16REQUIRES_VIOLATION, sll_circular_appendErr5REQUIRES_VIOLATION, sll_circular_appendErr7REQUIRES_VIOLATION, sll_circular_appendErr17REQUIRES_VIOLATION, sll_circular_appendErr6REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr2REQUIRES_VIOLATION, sll_circular_destroyErr3REQUIRES_VIOLATION, sll_circular_destroyErr1REQUIRES_VIOLATION, sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr0REQUIRES_VIOLATION, sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 06:47:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:47:06,536 INFO L82 PathProgramCache]: Analyzing trace with hash 823163795, now seen corresponding path program 1 times [2019-11-20 06:47:06,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:47:06,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [185037928] [2019-11-20 06:47:06,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:47:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:47:06,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 06:47:06,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:47:06,780 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 06:47:06,780 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:06,787 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:06,788 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:47:06,788 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 06:47:06,799 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 06:47:06,799 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:47:06,842 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 06:47:06,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [185037928] [2019-11-20 06:47:06,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:47:06,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 06:47:06,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512099957] [2019-11-20 06:47:06,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 06:47:06,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:47:06,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 06:47:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 06:47:06,849 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand 4 states. [2019-11-20 06:47:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:47:07,301 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2019-11-20 06:47:07,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 06:47:07,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-20 06:47:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:47:07,304 INFO L225 Difference]: With dead ends: 121 [2019-11-20 06:47:07,304 INFO L226 Difference]: Without dead ends: 121 [2019-11-20 06:47:07,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 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 06:47:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-20 06:47:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-11-20 06:47:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-20 06:47:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2019-11-20 06:47:07,318 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 12 [2019-11-20 06:47:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:47:07,318 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2019-11-20 06:47:07,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 06:47:07,318 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2019-11-20 06:47:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 06:47:07,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:47:07,319 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 06:47:07,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:47:07,523 INFO L410 AbstractCegarLoop]: === Iteration 3 === [sll_circular_appendErr19REQUIRES_VIOLATION, sll_circular_appendErr8REQUIRES_VIOLATION, sll_circular_appendErr18REQUIRES_VIOLATION, sll_circular_appendErr9REQUIRES_VIOLATION, sll_circular_appendErr0REQUIRES_VIOLATION, sll_circular_appendErr11REQUIRES_VIOLATION, sll_circular_appendErr10REQUIRES_VIOLATION, sll_circular_appendErr12REQUIRES_VIOLATION, sll_circular_appendErr1REQUIRES_VIOLATION, sll_circular_appendErr3REQUIRES_VIOLATION, sll_circular_appendErr13REQUIRES_VIOLATION, sll_circular_appendErr2REQUIRES_VIOLATION, sll_circular_appendErr15REQUIRES_VIOLATION, sll_circular_appendErr4REQUIRES_VIOLATION, sll_circular_appendErr14REQUIRES_VIOLATION, sll_circular_appendErr16REQUIRES_VIOLATION, sll_circular_appendErr5REQUIRES_VIOLATION, sll_circular_appendErr7REQUIRES_VIOLATION, sll_circular_appendErr17REQUIRES_VIOLATION, sll_circular_appendErr6REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr2REQUIRES_VIOLATION, sll_circular_destroyErr3REQUIRES_VIOLATION, sll_circular_destroyErr1REQUIRES_VIOLATION, sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr0REQUIRES_VIOLATION, sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 06:47:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:47:07,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1638372873, now seen corresponding path program 1 times [2019-11-20 06:47:07,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:47:07,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1123278851] [2019-11-20 06:47:07,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:47:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:47:07,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 06:47:07,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:47:07,788 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 06:47:07,792 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:47:07,841 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 06:47:07,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1123278851] [2019-11-20 06:47:07,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:47:07,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-20 06:47:07,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713011633] [2019-11-20 06:47:07,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 06:47:07,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:47:07,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 06:47:07,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 06:47:07,843 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 8 states. [2019-11-20 06:47:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:47:07,966 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2019-11-20 06:47:07,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 06:47:07,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-20 06:47:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:47:07,972 INFO L225 Difference]: With dead ends: 128 [2019-11-20 06:47:07,972 INFO L226 Difference]: Without dead ends: 128 [2019-11-20 06:47:07,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 06:47:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-20 06:47:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2019-11-20 06:47:07,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-20 06:47:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2019-11-20 06:47:07,992 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 19 [2019-11-20 06:47:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:47:07,992 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2019-11-20 06:47:07,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 06:47:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2019-11-20 06:47:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 06:47:07,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:47:07,994 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:47:08,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:47:08,206 INFO L410 AbstractCegarLoop]: === Iteration 4 === [sll_circular_appendErr19REQUIRES_VIOLATION, sll_circular_appendErr8REQUIRES_VIOLATION, sll_circular_appendErr18REQUIRES_VIOLATION, sll_circular_appendErr9REQUIRES_VIOLATION, sll_circular_appendErr0REQUIRES_VIOLATION, sll_circular_appendErr11REQUIRES_VIOLATION, sll_circular_appendErr10REQUIRES_VIOLATION, sll_circular_appendErr12REQUIRES_VIOLATION, sll_circular_appendErr1REQUIRES_VIOLATION, sll_circular_appendErr3REQUIRES_VIOLATION, sll_circular_appendErr13REQUIRES_VIOLATION, sll_circular_appendErr2REQUIRES_VIOLATION, sll_circular_appendErr15REQUIRES_VIOLATION, sll_circular_appendErr4REQUIRES_VIOLATION, sll_circular_appendErr14REQUIRES_VIOLATION, sll_circular_appendErr16REQUIRES_VIOLATION, sll_circular_appendErr5REQUIRES_VIOLATION, sll_circular_appendErr7REQUIRES_VIOLATION, sll_circular_appendErr17REQUIRES_VIOLATION, sll_circular_appendErr6REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr2REQUIRES_VIOLATION, sll_circular_destroyErr3REQUIRES_VIOLATION, sll_circular_destroyErr1REQUIRES_VIOLATION, sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr0REQUIRES_VIOLATION, sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 06:47:08,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:47:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash 34280370, now seen corresponding path program 1 times [2019-11-20 06:47:08,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:47:08,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [861657132] [2019-11-20 06:47:08,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:47:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:47:08,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 06:47:08,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:47:08,493 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 06:47:08,494 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:08,496 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:08,496 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:47:08,496 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 06:47:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 06:47:08,529 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:47:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 06:47:08,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [861657132] [2019-11-20 06:47:08,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:47:08,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 06:47:08,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651916176] [2019-11-20 06:47:08,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 06:47:08,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:47:08,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 06:47:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 06:47:08,595 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand 6 states. [2019-11-20 06:47:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:47:09,144 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-11-20 06:47:09,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 06:47:09,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-11-20 06:47:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:47:09,147 INFO L225 Difference]: With dead ends: 122 [2019-11-20 06:47:09,147 INFO L226 Difference]: Without dead ends: 122 [2019-11-20 06:47:09,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 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 06:47:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-20 06:47:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-11-20 06:47:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-20 06:47:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2019-11-20 06:47:09,157 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 28 [2019-11-20 06:47:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:47:09,158 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2019-11-20 06:47:09,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 06:47:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2019-11-20 06:47:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 06:47:09,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:47:09,159 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:47:09,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:47:09,362 INFO L410 AbstractCegarLoop]: === Iteration 5 === [sll_circular_appendErr19REQUIRES_VIOLATION, sll_circular_appendErr8REQUIRES_VIOLATION, sll_circular_appendErr18REQUIRES_VIOLATION, sll_circular_appendErr9REQUIRES_VIOLATION, sll_circular_appendErr0REQUIRES_VIOLATION, sll_circular_appendErr11REQUIRES_VIOLATION, sll_circular_appendErr10REQUIRES_VIOLATION, sll_circular_appendErr12REQUIRES_VIOLATION, sll_circular_appendErr1REQUIRES_VIOLATION, sll_circular_appendErr3REQUIRES_VIOLATION, sll_circular_appendErr13REQUIRES_VIOLATION, sll_circular_appendErr2REQUIRES_VIOLATION, sll_circular_appendErr15REQUIRES_VIOLATION, sll_circular_appendErr4REQUIRES_VIOLATION, sll_circular_appendErr14REQUIRES_VIOLATION, sll_circular_appendErr16REQUIRES_VIOLATION, sll_circular_appendErr5REQUIRES_VIOLATION, sll_circular_appendErr7REQUIRES_VIOLATION, sll_circular_appendErr17REQUIRES_VIOLATION, sll_circular_appendErr6REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr2REQUIRES_VIOLATION, sll_circular_destroyErr3REQUIRES_VIOLATION, sll_circular_destroyErr1REQUIRES_VIOLATION, sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr0REQUIRES_VIOLATION, sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 06:47:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:47:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash 34280371, now seen corresponding path program 1 times [2019-11-20 06:47:09,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:47:09,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1903563491] [2019-11-20 06:47:09,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:47:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:47:09,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 06:47:09,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:47:09,604 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 06:47:09,604 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:09,612 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:09,612 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:47:09,612 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 06:47:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 06:47:09,676 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:47:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 06:47:09,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1903563491] [2019-11-20 06:47:09,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:47:09,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 06:47:09,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499496907] [2019-11-20 06:47:09,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 06:47:09,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:47:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 06:47:09,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 06:47:09,968 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 10 states. [2019-11-20 06:47:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:47:10,942 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2019-11-20 06:47:10,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 06:47:10,946 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-20 06:47:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:47:10,948 INFO L225 Difference]: With dead ends: 121 [2019-11-20 06:47:10,948 INFO L226 Difference]: Without dead ends: 121 [2019-11-20 06:47:10,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 06:47:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-20 06:47:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-11-20 06:47:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-20 06:47:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2019-11-20 06:47:10,957 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 28 [2019-11-20 06:47:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:47:10,957 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2019-11-20 06:47:10,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 06:47:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2019-11-20 06:47:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 06:47:10,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:47:10,958 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:47:11,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:47:11,161 INFO L410 AbstractCegarLoop]: === Iteration 6 === [sll_circular_appendErr19REQUIRES_VIOLATION, sll_circular_appendErr8REQUIRES_VIOLATION, sll_circular_appendErr18REQUIRES_VIOLATION, sll_circular_appendErr9REQUIRES_VIOLATION, sll_circular_appendErr0REQUIRES_VIOLATION, sll_circular_appendErr11REQUIRES_VIOLATION, sll_circular_appendErr10REQUIRES_VIOLATION, sll_circular_appendErr12REQUIRES_VIOLATION, sll_circular_appendErr1REQUIRES_VIOLATION, sll_circular_appendErr3REQUIRES_VIOLATION, sll_circular_appendErr13REQUIRES_VIOLATION, sll_circular_appendErr2REQUIRES_VIOLATION, sll_circular_appendErr15REQUIRES_VIOLATION, sll_circular_appendErr4REQUIRES_VIOLATION, sll_circular_appendErr14REQUIRES_VIOLATION, sll_circular_appendErr16REQUIRES_VIOLATION, sll_circular_appendErr5REQUIRES_VIOLATION, sll_circular_appendErr7REQUIRES_VIOLATION, sll_circular_appendErr17REQUIRES_VIOLATION, sll_circular_appendErr6REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr2REQUIRES_VIOLATION, sll_circular_destroyErr3REQUIRES_VIOLATION, sll_circular_destroyErr1REQUIRES_VIOLATION, sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr0REQUIRES_VIOLATION, sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 06:47:11,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:47:11,161 INFO L82 PathProgramCache]: Analyzing trace with hash -955558121, now seen corresponding path program 1 times [2019-11-20 06:47:11,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:47:11,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1241756908] [2019-11-20 06:47:11,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:47:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:47:11,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 06:47:11,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:47:11,410 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 06:47:11,411 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:11,413 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:11,413 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:47:11,413 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 06:47:11,509 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:11,509 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-20 06:47:11,510 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:11,528 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 06:47:11,529 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 06:47:11,530 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 06:47:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 06:47:11,541 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:47:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 06:47:11,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1241756908] [2019-11-20 06:47:11,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:47:11,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 06:47:11,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125554339] [2019-11-20 06:47:11,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 06:47:11,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:47:11,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 06:47:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 06:47:11,699 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand 9 states. [2019-11-20 06:47:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:47:38,643 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-11-20 06:47:38,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 06:47:38,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-11-20 06:47:38,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:47:38,645 INFO L225 Difference]: With dead ends: 141 [2019-11-20 06:47:38,645 INFO L226 Difference]: Without dead ends: 141 [2019-11-20 06:47:38,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-20 06:47:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-20 06:47:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2019-11-20 06:47:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-20 06:47:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2019-11-20 06:47:38,664 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 31 [2019-11-20 06:47:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:47:38,666 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2019-11-20 06:47:38,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 06:47:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2019-11-20 06:47:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 06:47:38,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:47:38,667 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:47:38,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:47:38,879 INFO L410 AbstractCegarLoop]: === Iteration 7 === [sll_circular_appendErr19REQUIRES_VIOLATION, sll_circular_appendErr8REQUIRES_VIOLATION, sll_circular_appendErr18REQUIRES_VIOLATION, sll_circular_appendErr9REQUIRES_VIOLATION, sll_circular_appendErr0REQUIRES_VIOLATION, sll_circular_appendErr11REQUIRES_VIOLATION, sll_circular_appendErr10REQUIRES_VIOLATION, sll_circular_appendErr12REQUIRES_VIOLATION, sll_circular_appendErr1REQUIRES_VIOLATION, sll_circular_appendErr3REQUIRES_VIOLATION, sll_circular_appendErr13REQUIRES_VIOLATION, sll_circular_appendErr2REQUIRES_VIOLATION, sll_circular_appendErr15REQUIRES_VIOLATION, sll_circular_appendErr4REQUIRES_VIOLATION, sll_circular_appendErr14REQUIRES_VIOLATION, sll_circular_appendErr16REQUIRES_VIOLATION, sll_circular_appendErr5REQUIRES_VIOLATION, sll_circular_appendErr7REQUIRES_VIOLATION, sll_circular_appendErr17REQUIRES_VIOLATION, sll_circular_appendErr6REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr2REQUIRES_VIOLATION, sll_circular_destroyErr3REQUIRES_VIOLATION, sll_circular_destroyErr1REQUIRES_VIOLATION, sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr0REQUIRES_VIOLATION, sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 06:47:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:47:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash -955558120, now seen corresponding path program 1 times [2019-11-20 06:47:38,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:47:38,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1032426822] [2019-11-20 06:47:38,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:47:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:47:39,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 06:47:39,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:47:39,144 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 06:47:39,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:39,152 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:39,155 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 06:47:39,155 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:39,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:39,162 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:47:39,162 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 06:47:39,274 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:39,274 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2019-11-20 06:47:39,275 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:39,286 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:39,290 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2019-11-20 06:47:39,291 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:47:39,299 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:47:39,300 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 06:47:39,300 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2019-11-20 06:47:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:47:39,336 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:47:39,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 06:47:39,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 06:47:39,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:39,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:39,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:39,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:39,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:39,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:39,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:39,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:43,505 WARN L191 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2019-11-20 06:47:43,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:47:46,246 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-11-20 06:47:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:47:46,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1032426822] [2019-11-20 06:47:46,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:47:46,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 06:47:46,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931901290] [2019-11-20 06:47:46,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 06:47:46,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:47:46,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 06:47:46,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2019-11-20 06:47:46,898 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand 16 states. [2019-11-20 06:47:51,437 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv1 1) (select |c_#valid| c_node_create_~temp~0.base)) (exists ((|node_create_#t~malloc2.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |node_create_#t~malloc2.base|) (_ bv0 1)) (= (store |c_old(#length)| |node_create_#t~malloc2.base| (_ bv8 32)) |c_#length|))) (= (bvadd (select |c_#length| c_node_create_~temp~0.base) (_ bv4294967288 32)) (_ bv0 32)) (forall ((v_sll_circular_create_~last~0.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_sll_circular_create_~last~0.base_BEFORE_CALL_4 (_ BitVec 32)) (|v_node_create_#t~malloc2.base_31| (_ BitVec 32))) (let ((.cse0 (bvadd v_sll_circular_create_~last~0.offset_BEFORE_CALL_2 (_ bv4 32)))) (or (not (bvsle v_sll_circular_create_~last~0.offset_BEFORE_CALL_2 .cse0)) (exists ((v_prenex_2 (_ BitVec 32))) (and (not (bvsle (bvadd v_sll_circular_create_~last~0.offset_BEFORE_CALL_2 (_ bv4 32)) (select (store |c_old(#length)| v_prenex_2 (_ bv8 32)) v_sll_circular_create_~last~0.base_BEFORE_CALL_4))) (= (_ bv0 1) (select |c_old(#valid)| v_prenex_2)))) (bvsle .cse0 (select (store |c_#length| |v_node_create_#t~malloc2.base_31| (_ bv8 32)) v_sll_circular_create_~last~0.base_BEFORE_CALL_4)) (not (bvsle (_ bv0 32) v_sll_circular_create_~last~0.offset_BEFORE_CALL_2)) (not (= (select |c_#valid| |v_node_create_#t~malloc2.base_31|) (_ bv0 1)))))) (= (_ bv0 32) c_node_create_~temp~0.offset)) is different from false [2019-11-20 06:48:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:48:11,558 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2019-11-20 06:48:11,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 06:48:11,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2019-11-20 06:48:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:48:11,560 INFO L225 Difference]: With dead ends: 138 [2019-11-20 06:48:11,560 INFO L226 Difference]: Without dead ends: 138 [2019-11-20 06:48:11,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=74, Invalid=348, Unknown=2, NotChecked=38, Total=462 [2019-11-20 06:48:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-20 06:48:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2019-11-20 06:48:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-20 06:48:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2019-11-20 06:48:11,567 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 31 [2019-11-20 06:48:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:48:11,568 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2019-11-20 06:48:11,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 06:48:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2019-11-20 06:48:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-20 06:48:11,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:48:11,569 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:48:11,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:48:11,770 INFO L410 AbstractCegarLoop]: === Iteration 8 === [sll_circular_appendErr19REQUIRES_VIOLATION, sll_circular_appendErr8REQUIRES_VIOLATION, sll_circular_appendErr18REQUIRES_VIOLATION, sll_circular_appendErr9REQUIRES_VIOLATION, sll_circular_appendErr0REQUIRES_VIOLATION, sll_circular_appendErr11REQUIRES_VIOLATION, sll_circular_appendErr10REQUIRES_VIOLATION, sll_circular_appendErr12REQUIRES_VIOLATION, sll_circular_appendErr1REQUIRES_VIOLATION, sll_circular_appendErr3REQUIRES_VIOLATION, sll_circular_appendErr13REQUIRES_VIOLATION, sll_circular_appendErr2REQUIRES_VIOLATION, sll_circular_appendErr15REQUIRES_VIOLATION, sll_circular_appendErr4REQUIRES_VIOLATION, sll_circular_appendErr14REQUIRES_VIOLATION, sll_circular_appendErr16REQUIRES_VIOLATION, sll_circular_appendErr5REQUIRES_VIOLATION, sll_circular_appendErr7REQUIRES_VIOLATION, sll_circular_appendErr17REQUIRES_VIOLATION, sll_circular_appendErr6REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr2REQUIRES_VIOLATION, sll_circular_destroyErr3REQUIRES_VIOLATION, sll_circular_destroyErr1REQUIRES_VIOLATION, sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_destroyErr0REQUIRES_VIOLATION, sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 06:48:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:48:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1532594464, now seen corresponding path program 1 times [2019-11-20 06:48:11,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:48:11,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [651810484] [2019-11-20 06:48:11,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64131a6c-1a83-46b2-ab09-5816b2b44f65/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 06:48:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:48:12,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 06:48:12,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:48:12,129 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 06:48:12,129 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:48:12,133 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:48:12,133 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:48:12,133 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 06:48:12,338 INFO L343 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2019-11-20 06:48:12,338 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 06:48:12,339 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:48:12,362 INFO L567 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2019-11-20 06:48:12,362 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 06:48:12,362 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:20 [2019-11-20 06:48:12,490 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:48:12,491 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 52 [2019-11-20 06:48:12,491 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:48:12,522 INFO L567 ElimStorePlain]: treesize reduction 28, result has 41.7 percent of original size [2019-11-20 06:48:12,522 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 06:48:12,523 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:20 [2019-11-20 06:48:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-20 06:48:12,548 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:48:26,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:48:26,401 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 06:48:26,403 INFO L168 Benchmark]: Toolchain (without parser) took 82646.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.9 MB). Free memory was 946.1 MB in the beginning and 1.0 GB in the end (delta: -84.3 MB). Peak memory consumption was 117.6 MB. Max. memory is 11.5 GB. [2019-11-20 06:48:26,404 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:48:26,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 589.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -182.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-11-20 06:48:26,405 INFO L168 Benchmark]: Boogie Preprocessor took 69.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:48:26,405 INFO L168 Benchmark]: RCFGBuilder took 1123.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 70.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 11.5 GB. [2019-11-20 06:48:26,405 INFO L168 Benchmark]: TraceAbstraction took 80856.81 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.1 MB). Peak memory consumption was 72.7 MB. Max. memory is 11.5 GB. [2019-11-20 06:48:26,411 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 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 589.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -182.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 69.81 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 1123.89 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: 70.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 80856.81 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.1 MB). Peak memory consumption was 72.7 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...