./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_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_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 9459b8edd4bc1a8100b2516dc16681291af0c7dd ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 01:40:42,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 01:40:42,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 01:40:42,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 01:40:42,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 01:40:42,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 01:40:42,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 01:40:42,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 01:40:42,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 01:40:42,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 01:40:42,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 01:40:43,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 01:40:43,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 01:40:43,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 01:40:43,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 01:40:43,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 01:40:43,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 01:40:43,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 01:40:43,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 01:40:43,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 01:40:43,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 01:40:43,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 01:40:43,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 01:40:43,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 01:40:43,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 01:40:43,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 01:40:43,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 01:40:43,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 01:40:43,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 01:40:43,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 01:40:43,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 01:40:43,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 01:40:43,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 01:40:43,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 01:40:43,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 01:40:43,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 01:40:43,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 01:40:43,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 01:40:43,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 01:40:43,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 01:40:43,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 01:40:43,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 01:40:43,063 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 01:40:43,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 01:40:43,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 01:40:43,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 01:40:43,066 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 01:40:43,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 01:40:43,066 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 01:40:43,067 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 01:40:43,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 01:40:43,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 01:40:43,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 01:40:43,069 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 01:40:43,069 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 01:40:43,069 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 01:40:43,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 01:40:43,070 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 01:40:43,070 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 01:40:43,070 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 01:40:43,070 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 01:40:43,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 01:40:43,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 01:40:43,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 01:40:43,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 01:40:43,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 01:40:43,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 01:40:43,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 01:40:43,072 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 01:40:43,073 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 01:40:43,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 01:40:43,073 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_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 -> 9459b8edd4bc1a8100b2516dc16681291af0c7dd [2019-11-20 01:40:43,256 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 01:40:43,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 01:40:43,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 01:40:43,276 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 01:40:43,277 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 01:40:43,277 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2019-11-20 01:40:43,379 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/data/294e79b4c/05b6b8f1f1964afabe784092c8ae420d/FLAG2a0c8ec1a [2019-11-20 01:40:43,922 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 01:40:43,922 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2019-11-20 01:40:43,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/data/294e79b4c/05b6b8f1f1964afabe784092c8ae420d/FLAG2a0c8ec1a [2019-11-20 01:40:44,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/data/294e79b4c/05b6b8f1f1964afabe784092c8ae420d [2019-11-20 01:40:44,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 01:40:44,184 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 01:40:44,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 01:40:44,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 01:40:44,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 01:40:44,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dff6d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44, skipping insertion in model container [2019-11-20 01:40:44,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,205 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 01:40:44,256 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 01:40:44,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:40:44,732 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 01:40:44,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:40:44,862 INFO L192 MainTranslator]: Completed translation [2019-11-20 01:40:44,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44 WrapperNode [2019-11-20 01:40:44,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 01:40:44,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 01:40:44,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 01:40:44,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 01:40:44,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (1/1) ... [2019-11-20 01:40:44,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 01:40:44,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 01:40:44,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 01:40:44,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 01:40:44,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:40:45,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 01:40:45,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 01:40:45,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 01:40:45,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 01:40:45,058 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 01:40:45,058 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 01:40:45,059 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2019-11-20 01:40:45,059 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2019-11-20 01:40:45,060 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_insert [2019-11-20 01:40:45,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 01:40:45,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 01:40:45,061 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 01:40:45,062 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 01:40:45,062 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 01:40:45,062 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 01:40:45,063 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 01:40:45,063 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 01:40:45,064 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 01:40:45,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 01:40:45,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 01:40:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 01:40:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 01:40:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 01:40:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 01:40:45,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 01:40:45,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 01:40:45,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 01:40:45,068 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 01:40:45,068 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 01:40:45,068 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 01:40:45,068 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 01:40:45,069 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 01:40:45,069 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 01:40:45,069 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 01:40:45,069 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 01:40:45,070 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 01:40:45,070 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 01:40:45,070 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 01:40:45,070 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 01:40:45,071 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 01:40:45,071 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 01:40:45,071 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 01:40:45,071 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 01:40:45,071 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 01:40:45,072 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 01:40:45,073 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 01:40:45,073 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 01:40:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 01:40:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 01:40:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 01:40:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 01:40:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 01:40:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 01:40:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 01:40:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 01:40:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 01:40:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 01:40:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 01:40:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 01:40:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 01:40:45,077 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 01:40:45,077 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 01:40:45,077 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 01:40:45,078 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 01:40:45,078 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 01:40:45,078 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 01:40:45,078 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 01:40:45,079 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 01:40:45,080 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 01:40:45,080 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 01:40:45,080 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 01:40:45,081 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 01:40:45,081 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 01:40:45,082 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 01:40:45,082 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 01:40:45,083 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 01:40:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 01:40:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 01:40:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 01:40:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 01:40:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 01:40:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 01:40:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 01:40:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 01:40:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 01:40:45,085 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 01:40:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 01:40:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 01:40:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 01:40:45,086 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 01:40:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 01:40:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 01:40:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 01:40:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 01:40:45,087 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 01:40:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 01:40:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 01:40:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 01:40:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 01:40:45,088 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 01:40:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 01:40:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 01:40:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 01:40:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 01:40:45,089 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 01:40:45,090 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 01:40:45,090 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 01:40:45,090 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 01:40:45,090 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 01:40:45,091 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 01:40:45,091 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 01:40:45,091 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 01:40:45,091 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 01:40:45,091 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 01:40:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 01:40:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 01:40:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 01:40:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 01:40:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 01:40:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 01:40:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 01:40:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2019-11-20 01:40:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2019-11-20 01:40:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 01:40:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 01:40:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_insert [2019-11-20 01:40:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 01:40:45,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 01:40:45,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 01:40:45,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 01:40:45,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 01:40:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 01:40:45,775 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 01:40:46,538 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 01:40:46,539 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 01:40:46,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:40:46 BoogieIcfgContainer [2019-11-20 01:40:46,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 01:40:46,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 01:40:46,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 01:40:46,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 01:40:46,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 01:40:44" (1/3) ... [2019-11-20 01:40:46,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577ba7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:40:46, skipping insertion in model container [2019-11-20 01:40:46,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:40:44" (2/3) ... [2019-11-20 01:40:46,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577ba7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:40:46, skipping insertion in model container [2019-11-20 01:40:46,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:40:46" (3/3) ... [2019-11-20 01:40:46,563 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2019-11-20 01:40:46,576 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 01:40:46,588 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 71 error locations. [2019-11-20 01:40:46,602 INFO L249 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2019-11-20 01:40:46,630 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 01:40:46,631 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 01:40:46,631 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 01:40:46,631 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 01:40:46,631 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 01:40:46,632 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 01:40:46,632 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 01:40:46,632 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 01:40:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2019-11-20 01:40:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 01:40:46,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:40:46,688 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:40:46,689 INFO L410 AbstractCegarLoop]: === Iteration 1 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:40:46,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:40:46,697 INFO L82 PathProgramCache]: Analyzing trace with hash -799534984, now seen corresponding path program 1 times [2019-11-20 01:40:46,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:40:46,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1385348035] [2019-11-20 01:40:46,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:40:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:40:46,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 01:40:47,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:40:47,071 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 01:40:47,072 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:40:47,081 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:40:47,081 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:40:47,082 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:40:47,093 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 01:40:47,093 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:40:47,113 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 01:40:47,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385348035] [2019-11-20 01:40:47,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:40:47,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 01:40:47,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055797256] [2019-11-20 01:40:47,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 01:40:47,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:40:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 01:40:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 01:40:47,147 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 3 states. [2019-11-20 01:40:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:40:47,708 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2019-11-20 01:40:47,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 01:40:47,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 01:40:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:40:47,724 INFO L225 Difference]: With dead ends: 167 [2019-11-20 01:40:47,725 INFO L226 Difference]: Without dead ends: 160 [2019-11-20 01:40:47,727 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 01:40:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-20 01:40:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2019-11-20 01:40:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-20 01:40:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2019-11-20 01:40:47,837 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 12 [2019-11-20 01:40:47,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:40:47,838 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2019-11-20 01:40:47,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 01:40:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2019-11-20 01:40:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 01:40:47,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:40:47,840 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:40:48,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:40:48,044 INFO L410 AbstractCegarLoop]: === Iteration 2 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:40:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:40:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash -799534983, now seen corresponding path program 1 times [2019-11-20 01:40:48,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:40:48,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1644373210] [2019-11-20 01:40:48,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:40:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:40:48,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 01:40:48,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:40:48,331 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 01:40:48,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:40:48,343 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:40:48,343 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:40:48,344 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 01:40:48,358 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 01:40:48,358 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:40:48,413 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 01:40:48,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1644373210] [2019-11-20 01:40:48,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:40:48,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 01:40:48,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288213790] [2019-11-20 01:40:48,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 01:40:48,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:40:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 01:40:48,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 01:40:48,417 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand 4 states. [2019-11-20 01:40:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:40:49,170 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2019-11-20 01:40:49,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 01:40:49,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-20 01:40:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:40:49,176 INFO L225 Difference]: With dead ends: 157 [2019-11-20 01:40:49,176 INFO L226 Difference]: Without dead ends: 157 [2019-11-20 01:40:49,177 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 01:40:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-20 01:40:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-20 01:40:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-20 01:40:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 166 transitions. [2019-11-20 01:40:49,197 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 166 transitions. Word has length 12 [2019-11-20 01:40:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:40:49,197 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 166 transitions. [2019-11-20 01:40:49,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 01:40:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 166 transitions. [2019-11-20 01:40:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 01:40:49,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:40:49,199 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:40:49,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:40:49,403 INFO L410 AbstractCegarLoop]: === Iteration 3 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:40:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:40:49,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2095176132, now seen corresponding path program 1 times [2019-11-20 01:40:49,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:40:49,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [471038259] [2019-11-20 01:40:49,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:40:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:40:49,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 01:40:49,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:40:49,737 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 01:40:49,738 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:40:49,805 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 01:40:49,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471038259] [2019-11-20 01:40:49,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:40:49,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-20 01:40:49,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308189822] [2019-11-20 01:40:49,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 01:40:49,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:40:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 01:40:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 01:40:49,808 INFO L87 Difference]: Start difference. First operand 157 states and 166 transitions. Second operand 8 states. [2019-11-20 01:40:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:40:49,924 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2019-11-20 01:40:49,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:40:49,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-20 01:40:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:40:49,929 INFO L225 Difference]: With dead ends: 168 [2019-11-20 01:40:49,929 INFO L226 Difference]: Without dead ends: 168 [2019-11-20 01:40:49,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 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 01:40:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-20 01:40:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2019-11-20 01:40:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-20 01:40:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2019-11-20 01:40:49,975 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 20 [2019-11-20 01:40:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:40:49,976 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2019-11-20 01:40:49,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 01:40:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2019-11-20 01:40:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 01:40:49,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:40:49,978 INFO L410 BasicCegarLoop]: trace histogram [2, 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 01:40:50,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:40:50,185 INFO L410 AbstractCegarLoop]: === Iteration 4 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:40:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:40:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash -910325507, now seen corresponding path program 1 times [2019-11-20 01:40:50,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:40:50,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2040596009] [2019-11-20 01:40:50,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:40:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:40:50,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 01:40:50,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:40:50,578 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 01:40:50,579 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:40:50,591 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:40:50,592 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:40:50,592 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 01:40:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:40:50,669 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:40:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:40:51,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2040596009] [2019-11-20 01:40:51,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:40:51,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 01:40:51,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069706799] [2019-11-20 01:40:51,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 01:40:51,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:40:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 01:40:51,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 01:40:51,107 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand 10 states. [2019-11-20 01:40:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:40:53,152 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2019-11-20 01:40:53,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:40:53,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-20 01:40:53,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:40:53,160 INFO L225 Difference]: With dead ends: 158 [2019-11-20 01:40:53,160 INFO L226 Difference]: Without dead ends: 158 [2019-11-20 01:40:53,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 01:40:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-11-20 01:40:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-11-20 01:40:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-20 01:40:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 166 transitions. [2019-11-20 01:40:53,181 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 166 transitions. Word has length 30 [2019-11-20 01:40:53,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:40:53,181 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 166 transitions. [2019-11-20 01:40:53,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 01:40:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 166 transitions. [2019-11-20 01:40:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 01:40:53,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:40:53,188 INFO L410 BasicCegarLoop]: trace histogram [2, 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 01:40:53,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:40:53,393 INFO L410 AbstractCegarLoop]: === Iteration 5 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:40:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:40:53,394 INFO L82 PathProgramCache]: Analyzing trace with hash -910325508, now seen corresponding path program 1 times [2019-11-20 01:40:53,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:40:53,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1979332369] [2019-11-20 01:40:53,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:40:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:40:53,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 01:40:53,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:40:53,731 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 01:40:53,732 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:40:53,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:40:53,741 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:40:53,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:40:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:40:53,784 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:40:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:40:53,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1979332369] [2019-11-20 01:40:53,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:40:53,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 01:40:53,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85733153] [2019-11-20 01:40:53,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 01:40:53,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:40:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 01:40:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 01:40:53,857 INFO L87 Difference]: Start difference. First operand 157 states and 166 transitions. Second operand 6 states. [2019-11-20 01:40:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:40:54,675 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2019-11-20 01:40:54,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:40:54,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-20 01:40:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:40:54,679 INFO L225 Difference]: With dead ends: 157 [2019-11-20 01:40:54,679 INFO L226 Difference]: Without dead ends: 157 [2019-11-20 01:40:54,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 1 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 01:40:54,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-20 01:40:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2019-11-20 01:40:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-20 01:40:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2019-11-20 01:40:54,697 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 30 [2019-11-20 01:40:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:40:54,698 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2019-11-20 01:40:54,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 01:40:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2019-11-20 01:40:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 01:40:54,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:40:54,699 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:40:54,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:40:54,901 INFO L410 AbstractCegarLoop]: === Iteration 6 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:40:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:40:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1350514845, now seen corresponding path program 1 times [2019-11-20 01:40:54,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:40:54,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1679508972] [2019-11-20 01:40:54,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:40:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:40:55,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 01:40:55,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:40:55,239 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 01:40:55,240 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:40:55,242 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:40:55,243 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:40:55,243 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:40:55,365 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:40:55,366 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 01:40:55,367 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:40:55,391 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 01:40:55,392 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 01:40:55,392 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 01:40:55,407 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 01:40:55,408 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:40:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:40:55,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1679508972] [2019-11-20 01:40:55,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:40:55,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 01:40:55,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133847330] [2019-11-20 01:40:55,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 01:40:55,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:40:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 01:40:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 01:40:55,617 INFO L87 Difference]: Start difference. First operand 156 states and 165 transitions. Second operand 9 states. [2019-11-20 01:41:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:41:13,568 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2019-11-20 01:41:13,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 01:41:13,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-20 01:41:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:41:13,572 INFO L225 Difference]: With dead ends: 197 [2019-11-20 01:41:13,572 INFO L226 Difference]: Without dead ends: 197 [2019-11-20 01:41:13,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 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 01:41:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-20 01:41:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 161. [2019-11-20 01:41:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-20 01:41:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 173 transitions. [2019-11-20 01:41:13,600 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 173 transitions. Word has length 32 [2019-11-20 01:41:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:41:13,602 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 173 transitions. [2019-11-20 01:41:13,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 01:41:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 173 transitions. [2019-11-20 01:41:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 01:41:13,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:41:13,606 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:41:13,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:13,811 INFO L410 AbstractCegarLoop]: === Iteration 7 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:41:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:41:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1350514846, now seen corresponding path program 1 times [2019-11-20 01:41:13,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:41:13,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1945867827] [2019-11-20 01:41:13,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:41:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:41:14,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 01:41:14,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:41:14,305 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 01:41:14,305 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:41:14,329 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:14,336 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 01:41:14,337 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 01:41:14,349 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:14,349 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:41:14,349 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 01:41:14,549 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:14,550 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 01:41:14,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:41:14,563 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:14,568 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 14 treesize of output 16 [2019-11-20 01:41:14,569 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 01:41:14,583 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:14,584 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 01:41:14,584 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:20 [2019-11-20 01:41:14,638 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 01:41:14,638 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:41:14,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:41:15,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:15,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:41:15,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:15,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:15,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:15,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:41:15,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:15,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:22,493 WARN L191 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2019-11-20 01:41:22,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:25,791 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-11-20 01:41:26,850 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 01:41:26,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945867827] [2019-11-20 01:41:26,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:41:26,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 01:41:26,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452513] [2019-11-20 01:41:26,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 01:41:26,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:41:26,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 01:41:26,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2019-11-20 01:41:26,853 INFO L87 Difference]: Start difference. First operand 161 states and 173 transitions. Second operand 16 states. [2019-11-20 01:41:31,217 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_node_create_#t~malloc2.base_31| (_ BitVec 32)) (v_dll_circular_create_~head~0.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_dll_circular_create_~head~0.base_BEFORE_CALL_4 (_ BitVec 32))) (let ((.cse1 (bvadd v_dll_circular_create_~head~0.offset_BEFORE_CALL_2 (_ bv4 32))) (.cse0 (bvadd v_dll_circular_create_~head~0.offset_BEFORE_CALL_2 (_ bv8 32)))) (or (exists ((v_prenex_2 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_prenex_2)) (not (bvsle (bvadd v_dll_circular_create_~head~0.offset_BEFORE_CALL_2 (_ bv8 32)) (select (store |c_old(#length)| v_prenex_2 (_ bv12 32)) v_dll_circular_create_~head~0.base_BEFORE_CALL_4))))) (bvsle .cse0 (select (store |c_#length| |v_node_create_#t~malloc2.base_31| (_ bv12 32)) v_dll_circular_create_~head~0.base_BEFORE_CALL_4)) (not (bvsle (_ bv0 32) .cse1)) (not (bvsle .cse1 .cse0)) (not (= (select |c_#valid| |v_node_create_#t~malloc2.base_31|) (_ bv0 1)))))) (= (_ bv1 1) (select |c_#valid| c_node_create_~temp~0.base)) (= (_ bv0 32) c_node_create_~temp~0.offset) (exists ((|node_create_#t~malloc2.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |node_create_#t~malloc2.base|) (_ bv0 1)) (= |c_#length| (store |c_old(#length)| |node_create_#t~malloc2.base| (_ bv12 32))))) (= (bvadd (select |c_#length| c_node_create_~temp~0.base) (_ bv4294967284 32)) (_ bv0 32))) is different from false [2019-11-20 01:41:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:41:52,726 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2019-11-20 01:41:52,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 01:41:52,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-11-20 01:41:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:41:52,728 INFO L225 Difference]: With dead ends: 183 [2019-11-20 01:41:52,728 INFO L226 Difference]: Without dead ends: 183 [2019-11-20 01:41:52,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=82, Invalid=382, Unknown=2, NotChecked=40, Total=506 [2019-11-20 01:41:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-20 01:41:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2019-11-20 01:41:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-20 01:41:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 172 transitions. [2019-11-20 01:41:52,742 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 172 transitions. Word has length 32 [2019-11-20 01:41:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:41:52,742 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 172 transitions. [2019-11-20 01:41:52,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 01:41:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 172 transitions. [2019-11-20 01:41:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 01:41:52,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:41:52,744 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:41:52,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:52,947 INFO L410 AbstractCegarLoop]: === Iteration 8 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:41:52,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:41:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash 764796724, now seen corresponding path program 1 times [2019-11-20 01:41:52,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:41:52,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1381568708] [2019-11-20 01:41:52,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/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 01:41:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:41:53,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:41:53,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:41:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:41:53,146 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:41:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:41:53,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1381568708] [2019-11-20 01:41:53,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:41:53,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-20 01:41:53,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559426748] [2019-11-20 01:41:53,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 01:41:53,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:41:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 01:41:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 01:41:53,207 INFO L87 Difference]: Start difference. First operand 161 states and 172 transitions. Second operand 6 states. [2019-11-20 01:41:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:41:53,415 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2019-11-20 01:41:53,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:41:53,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-11-20 01:41:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:41:53,417 INFO L225 Difference]: With dead ends: 162 [2019-11-20 01:41:53,418 INFO L226 Difference]: Without dead ends: 162 [2019-11-20 01:41:53,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 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 01:41:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-20 01:41:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2019-11-20 01:41:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-20 01:41:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2019-11-20 01:41:53,423 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 34 [2019-11-20 01:41:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:41:53,424 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2019-11-20 01:41:53,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 01:41:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2019-11-20 01:41:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 01:41:53,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:41:53,425 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:41:53,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:53,626 INFO L410 AbstractCegarLoop]: === Iteration 9 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:41:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:41:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2065886027, now seen corresponding path program 1 times [2019-11-20 01:41:53,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:41:53,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1474372605] [2019-11-20 01:41:53,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:41:53,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 01:41:53,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:41:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:41:53,933 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:41:53,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:41:54,009 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-20 01:41:54,010 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 01:41:54,032 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2019-11-20 01:41:54,033 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 01:41:54,048 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:54,048 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 16 treesize of output 20 [2019-11-20 01:41:54,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:54,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:54,049 INFO L496 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 01:41:54,104 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:54,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:54,105 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 3 xjuncts. [2019-11-20 01:41:54,105 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:43 [2019-11-20 01:41:54,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:54,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:54,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:54,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:54,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:54,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:41:55,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1474372605] [2019-11-20 01:41:55,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:41:55,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 01:41:55,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752147792] [2019-11-20 01:41:55,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 01:41:55,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:41:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 01:41:55,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:41:55,213 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand 12 states. [2019-11-20 01:41:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:41:56,079 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2019-11-20 01:41:56,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 01:41:56,081 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-20 01:41:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:41:56,082 INFO L225 Difference]: With dead ends: 172 [2019-11-20 01:41:56,082 INFO L226 Difference]: Without dead ends: 172 [2019-11-20 01:41:56,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-20 01:41:56,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-20 01:41:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2019-11-20 01:41:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-20 01:41:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 176 transitions. [2019-11-20 01:41:56,089 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 176 transitions. Word has length 35 [2019-11-20 01:41:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:41:56,090 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 176 transitions. [2019-11-20 01:41:56,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 01:41:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 176 transitions. [2019-11-20 01:41:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 01:41:56,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:41:56,091 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:41:56,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:56,302 INFO L410 AbstractCegarLoop]: === Iteration 10 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:41:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:41:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2065886028, now seen corresponding path program 1 times [2019-11-20 01:41:56,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:41:56,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1675058480] [2019-11-20 01:41:56,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:41:56,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 01:41:56,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:41:56,558 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-11-20 01:41:56,559 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:41:56,561 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:56,561 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:41:56,561 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:5, output treesize:1 [2019-11-20 01:41:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 01:41:56,574 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:41:56,584 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:56,584 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 12 treesize of output 16 [2019-11-20 01:41:56,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:41:56,585 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:41:56,588 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:56,588 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:41:56,588 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:3 [2019-11-20 01:41:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 01:41:56,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675058480] [2019-11-20 01:41:56,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:41:56,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-20 01:41:56,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50273238] [2019-11-20 01:41:56,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 01:41:56,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:41:56,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 01:41:56,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 01:41:56,629 INFO L87 Difference]: Start difference. First operand 164 states and 176 transitions. Second operand 4 states. [2019-11-20 01:41:56,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:41:56,894 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2019-11-20 01:41:56,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 01:41:56,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-11-20 01:41:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:41:56,896 INFO L225 Difference]: With dead ends: 165 [2019-11-20 01:41:56,896 INFO L226 Difference]: Without dead ends: 165 [2019-11-20 01:41:56,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 01:41:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-20 01:41:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-20 01:41:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-20 01:41:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 175 transitions. [2019-11-20 01:41:56,901 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 175 transitions. Word has length 35 [2019-11-20 01:41:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:41:56,902 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 175 transitions. [2019-11-20 01:41:56,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 01:41:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 175 transitions. [2019-11-20 01:41:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 01:41:56,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:41:56,903 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:41:57,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:57,104 INFO L410 AbstractCegarLoop]: === Iteration 11 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:41:57,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:41:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash 382042575, now seen corresponding path program 1 times [2019-11-20 01:41:57,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:41:57,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1993303725] [2019-11-20 01:41:57,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:41:57,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 01:41:57,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:41:57,346 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 01:41:57,347 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:41:57,349 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:57,350 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:41:57,350 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:41:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:41:57,379 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:41:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:41:57,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993303725] [2019-11-20 01:41:57,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:41:57,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-20 01:41:57,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892040988] [2019-11-20 01:41:57,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 01:41:57,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:41:57,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 01:41:57,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 01:41:57,428 INFO L87 Difference]: Start difference. First operand 164 states and 175 transitions. Second operand 7 states. [2019-11-20 01:41:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:41:58,162 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2019-11-20 01:41:58,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 01:41:58,162 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-20 01:41:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:41:58,163 INFO L225 Difference]: With dead ends: 164 [2019-11-20 01:41:58,163 INFO L226 Difference]: Without dead ends: 164 [2019-11-20 01:41:58,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-20 01:41:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-20 01:41:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-11-20 01:41:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-11-20 01:41:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2019-11-20 01:41:58,171 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 36 [2019-11-20 01:41:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:41:58,171 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2019-11-20 01:41:58,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 01:41:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2019-11-20 01:41:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 01:41:58,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:41:58,173 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:41:58,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:58,381 INFO L410 AbstractCegarLoop]: === Iteration 12 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:41:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:41:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 382042576, now seen corresponding path program 1 times [2019-11-20 01:41:58,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:41:58,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1609737301] [2019-11-20 01:41:58,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:41:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:41:58,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 01:41:58,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:41:58,618 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 01:41:58,618 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:41:58,623 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:41:58,623 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:41:58,623 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 01:41:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:41:58,683 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:41:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:41:59,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609737301] [2019-11-20 01:41:59,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:41:59,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 01:41:59,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538363406] [2019-11-20 01:41:59,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 01:41:59,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:41:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 01:41:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:41:59,079 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand 12 states. [2019-11-20 01:42:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:42:01,030 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2019-11-20 01:42:01,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 01:42:01,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-20 01:42:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:42:01,032 INFO L225 Difference]: With dead ends: 163 [2019-11-20 01:42:01,033 INFO L226 Difference]: Without dead ends: 163 [2019-11-20 01:42:01,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-20 01:42:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-20 01:42:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-20 01:42:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-20 01:42:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 173 transitions. [2019-11-20 01:42:01,038 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 173 transitions. Word has length 36 [2019-11-20 01:42:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:42:01,038 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 173 transitions. [2019-11-20 01:42:01,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 01:42:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 173 transitions. [2019-11-20 01:42:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-20 01:42:01,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:42:01,039 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:42:01,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:42:01,240 INFO L410 AbstractCegarLoop]: === Iteration 13 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:42:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:42:01,240 INFO L82 PathProgramCache]: Analyzing trace with hash 825702806, now seen corresponding path program 1 times [2019-11-20 01:42:01,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:42:01,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2076896168] [2019-11-20 01:42:01,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:42:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:42:01,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 01:42:01,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:42:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 01:42:01,514 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:42:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-20 01:42:01,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2076896168] [2019-11-20 01:42:01,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:42:01,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 01:42:01,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266442652] [2019-11-20 01:42:01,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 01:42:01,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:42:01,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 01:42:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 01:42:01,586 INFO L87 Difference]: Start difference. First operand 162 states and 173 transitions. Second operand 10 states. [2019-11-20 01:42:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:42:01,661 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2019-11-20 01:42:01,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:42:01,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2019-11-20 01:42:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:42:01,663 INFO L225 Difference]: With dead ends: 150 [2019-11-20 01:42:01,663 INFO L226 Difference]: Without dead ends: 150 [2019-11-20 01:42:01,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:42:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-20 01:42:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2019-11-20 01:42:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-20 01:42:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 157 transitions. [2019-11-20 01:42:01,667 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 157 transitions. Word has length 47 [2019-11-20 01:42:01,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:42:01,667 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 157 transitions. [2019-11-20 01:42:01,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 01:42:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 157 transitions. [2019-11-20 01:42:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-20 01:42:01,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:42:01,668 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:42:01,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:42:01,874 INFO L410 AbstractCegarLoop]: === Iteration 14 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_insertErr9REQUIRES_VIOLATION, dll_circular_insertErr31REQUIRES_VIOLATION, dll_circular_insertErr30REQUIRES_VIOLATION, dll_circular_insertErr29REQUIRES_VIOLATION, dll_circular_insertErr8REQUIRES_VIOLATION, dll_circular_insertErr12REQUIRES_VIOLATION, dll_circular_insertErr33REQUIRES_VIOLATION, dll_circular_insertErr32REQUIRES_VIOLATION, dll_circular_insertErr10REQUIRES_VIOLATION, dll_circular_insertErr11REQUIRES_VIOLATION, dll_circular_insertErr14REQUIRES_VIOLATION, dll_circular_insertErr15REQUIRES_VIOLATION, dll_circular_insertErr13REQUIRES_VIOLATION, dll_circular_insertErr35REQUIRES_VIOLATION, dll_circular_insertErr34REQUIRES_VIOLATION, dll_circular_insertErr17REQUIRES_VIOLATION, dll_circular_insertErr16REQUIRES_VIOLATION, dll_circular_insertErr20REQUIRES_VIOLATION, dll_circular_insertErr18REQUIRES_VIOLATION, dll_circular_insertErr19REQUIRES_VIOLATION, dll_circular_insertErr1REQUIRES_VIOLATION, dll_circular_insertErr22REQUIRES_VIOLATION, dll_circular_insertErr23REQUIRES_VIOLATION, dll_circular_insertErr21REQUIRES_VIOLATION, dll_circular_insertErr0REQUIRES_VIOLATION, dll_circular_insertErr25REQUIRES_VIOLATION, dll_circular_insertErr4REQUIRES_VIOLATION, dll_circular_insertErr2REQUIRES_VIOLATION, dll_circular_insertErr3REQUIRES_VIOLATION, dll_circular_insertErr24REQUIRES_VIOLATION, dll_circular_insertErr6REQUIRES_VIOLATION, dll_circular_insertErr7REQUIRES_VIOLATION, dll_circular_insertErr28REQUIRES_VIOLATION, dll_circular_insertErr5REQUIRES_VIOLATION, dll_circular_insertErr26REQUIRES_VIOLATION, dll_circular_insertErr27REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 01:42:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:42:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash 277098478, now seen corresponding path program 1 times [2019-11-20 01:42:01,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:42:01,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1710553664] [2019-11-20 01:42:01,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e28e9e74-e9e5-4bc3-89dc-46c9e9826c5b/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:42:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:42:02,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 01:42:02,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:42:02,227 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 01:42:02,227 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:42:02,234 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:42:02,235 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:42:02,235 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 01:42:02,256 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2019-11-20 01:42:02,256 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:42:02,264 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:42:02,264 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 01:42:02,264 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2019-11-20 01:42:02,702 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 01:42:02,747 INFO L343 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2019-11-20 01:42:02,747 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 4 case distinctions, treesize of input 22 treesize of output 36 [2019-11-20 01:42:02,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:42:02,824 INFO L567 ElimStorePlain]: treesize reduction 4, result has 88.9 percent of original size [2019-11-20 01:42:02,825 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 01:42:02,825 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:32 [2019-11-20 01:42:03,066 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 01:42:03,090 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:42:03,090 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 01:42:03,091 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:42:03,146 INFO L567 ElimStorePlain]: treesize reduction 28, result has 50.0 percent of original size [2019-11-20 01:42:03,147 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 01:42:03,147 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:31, output treesize:28 [2019-11-20 01:42:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:42:03,191 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:42:22,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:42:22,719 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 01:42:22,723 INFO L168 Benchmark]: Toolchain (without parser) took 98538.85 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 343.9 MB). Free memory was 938.1 MB in the beginning and 1.2 GB in the end (delta: -265.1 MB). Peak memory consumption was 78.8 MB. Max. memory is 11.5 GB. [2019-11-20 01:42:22,723 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:42:22,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 677.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 938.1 MB in the beginning and 1.1 GB in the end (delta: -194.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-20 01:42:22,727 INFO L168 Benchmark]: Boogie Preprocessor took 101.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-20 01:42:22,728 INFO L168 Benchmark]: RCFGBuilder took 1576.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.0 MB). Peak memory consumption was 80.0 MB. Max. memory is 11.5 GB. [2019-11-20 01:42:22,728 INFO L168 Benchmark]: TraceAbstraction took 96177.00 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.4 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -157.5 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. [2019-11-20 01:42:22,731 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 677.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 938.1 MB in the beginning and 1.1 GB in the end (delta: -194.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 101.91 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1576.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.0 MB). Peak memory consumption was 80.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 96177.00 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.4 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -157.5 MB). Peak memory consumption was 23.9 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...