./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.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_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i -s /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 b171d8322722cfe50829ea6c9e3bfdd3740068da ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-11-19 23:41:05,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:41:05,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:41:05,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:41:05,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:41:05,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:41:05,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:41:05,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:41:05,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:41:05,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:41:05,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:41:05,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:41:05,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:41:05,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:41:05,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:41:05,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:41:05,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:41:05,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:41:05,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:41:05,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:41:05,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:41:05,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:41:05,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:41:05,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:41:05,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:41:05,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:41:05,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:41:05,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:41:05,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:41:05,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:41:05,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:41:05,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:41:05,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:41:05,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:41:05,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:41:05,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:41:05,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:41:05,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:41:05,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:41:05,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:41:05,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:41:05,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 23:41:05,969 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:41:05,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:41:05,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:41:05,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:41:05,972 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:41:05,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:41:05,975 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:41:05,975 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 23:41:05,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:41:05,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:41:05,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:41:05,977 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 23:41:05,977 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 23:41:05,978 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 23:41:05,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:41:05,978 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 23:41:05,978 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 23:41:05,979 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:41:05,979 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:41:05,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:41:05,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:41:05,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:41:05,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:41:05,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:41:05,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:41:05,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:41:05,981 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 23:41:05,982 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 23:41:05,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 23:41:05,982 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_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 -> b171d8322722cfe50829ea6c9e3bfdd3740068da [2019-11-19 23:41:06,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:41:06,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:41:06,175 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:41:06,177 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:41:06,177 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:41:06,178 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2019-11-19 23:41:06,264 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/data/fa5f8c72e/13ae889e162943cd95856018a1a7aebe/FLAGbe2ade88c [2019-11-19 23:41:06,738 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:41:06,738 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2019-11-19 23:41:06,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/data/fa5f8c72e/13ae889e162943cd95856018a1a7aebe/FLAGbe2ade88c [2019-11-19 23:41:07,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/bin/uautomizer/data/fa5f8c72e/13ae889e162943cd95856018a1a7aebe [2019-11-19 23:41:07,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:41:07,206 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 23:41:07,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:41:07,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:41:07,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:41:07,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:07,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e525d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07, skipping insertion in model container [2019-11-19 23:41:07,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:07,225 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:41:07,269 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:41:07,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:41:07,842 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:41:07,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:41:07,989 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:41:07,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07 WrapperNode [2019-11-19 23:41:07,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:41:07,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:41:07,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:41:07,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:41:08,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:08,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:08,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:08,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:08,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:08,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:08,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (1/1) ... [2019-11-19 23:41:08,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:41:08,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:41:08,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:41:08,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:41:08,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:41:08,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 23:41:08,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:41:08,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-19 23:41:08,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-19 23:41:08,171 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-19 23:41:08,171 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-19 23:41:08,171 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2019-11-19 23:41:08,171 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2019-11-19 23:41:08,172 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_prepend [2019-11-19 23:41:08,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 23:41:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-19 23:41:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-19 23:41:08,172 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-19 23:41:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-19 23:41:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-19 23:41:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-19 23:41:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-19 23:41:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-19 23:41:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-19 23:41:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-19 23:41:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-19 23:41:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-19 23:41:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-19 23:41:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-19 23:41:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-19 23:41:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-19 23:41:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-19 23:41:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-19 23:41:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-19 23:41:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-19 23:41:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-19 23:41:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-19 23:41:08,176 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-19 23:41:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-19 23:41:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-19 23:41:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-19 23:41:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-19 23:41:08,177 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-19 23:41:08,178 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-19 23:41:08,178 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-19 23:41:08,178 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-19 23:41:08,178 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-19 23:41:08,178 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-19 23:41:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-19 23:41:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-19 23:41:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-19 23:41:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-19 23:41:08,179 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-19 23:41:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-19 23:41:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-19 23:41:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-19 23:41:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-19 23:41:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-19 23:41:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-19 23:41:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-19 23:41:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-19 23:41:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-19 23:41:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-19 23:41:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-19 23:41:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-19 23:41:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-19 23:41:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-19 23:41:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-19 23:41:08,182 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-19 23:41:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-19 23:41:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-19 23:41:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-19 23:41:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-19 23:41:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-19 23:41:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-19 23:41:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-19 23:41:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-19 23:41:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-19 23:41:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-19 23:41:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-19 23:41:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-19 23:41:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-19 23:41:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-19 23:41:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-19 23:41:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-19 23:41:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-19 23:41:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-19 23:41:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-19 23:41:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-19 23:41:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-19 23:41:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-19 23:41:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-19 23:41:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-19 23:41:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-19 23:41:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-19 23:41:08,188 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-19 23:41:08,188 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-19 23:41:08,188 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-19 23:41:08,188 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-19 23:41:08,188 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-19 23:41:08,189 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-19 23:41:08,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-19 23:41:08,189 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-19 23:41:08,189 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-19 23:41:08,189 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-19 23:41:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-19 23:41:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-19 23:41:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-19 23:41:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-19 23:41:08,190 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-19 23:41:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-19 23:41:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-19 23:41:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-19 23:41:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-19 23:41:08,191 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-19 23:41:08,192 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-19 23:41:08,192 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-19 23:41:08,192 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-19 23:41:08,192 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-19 23:41:08,192 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-19 23:41:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-19 23:41:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-19 23:41:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-19 23:41:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 23:41:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-19 23:41:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 23:41:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2019-11-19 23:41:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2019-11-19 23:41:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-19 23:41:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:41:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_prepend [2019-11-19 23:41:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 23:41:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 23:41:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-19 23:41:08,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 23:41:08,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 23:41:08,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:41:08,824 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-19 23:41:09,473 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:41:09,473 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-19 23:41:09,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:41:09 BoogieIcfgContainer [2019-11-19 23:41:09,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:41:09,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:41:09,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:41:09,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:41:09,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:41:07" (1/3) ... [2019-11-19 23:41:09,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7f0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:41:09, skipping insertion in model container [2019-11-19 23:41:09,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:41:07" (2/3) ... [2019-11-19 23:41:09,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7f0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:41:09, skipping insertion in model container [2019-11-19 23:41:09,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:41:09" (3/3) ... [2019-11-19 23:41:09,482 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_unequal.i [2019-11-19 23:41:09,492 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:41:09,500 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 63 error locations. [2019-11-19 23:41:09,512 INFO L249 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2019-11-19 23:41:09,538 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:41:09,538 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 23:41:09,539 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:41:09,539 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:41:09,539 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:41:09,539 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:41:09,540 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:41:09,540 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:41:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2019-11-19 23:41:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 23:41:09,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:41:09,592 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:41:09,593 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:41:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:41:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash 759824206, now seen corresponding path program 1 times [2019-11-19 23:41:09,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:41:09,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [258464203] [2019-11-19 23:41:09,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:41:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:41:09,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 23:41:09,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:41:09,974 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 [2019-11-19 23:41:09,975 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:09,984 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:09,984 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:41:09,984 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:41:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:10,001 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:41:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:10,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [258464203] [2019-11-19 23:41:10,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:41:10,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 23:41:10,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230856849] [2019-11-19 23:41:10,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 23:41:10,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:41:10,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 23:41:10,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:41:10,050 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 3 states. [2019-11-19 23:41:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:41:10,522 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2019-11-19 23:41:10,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:41:10,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-19 23:41:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:41:10,537 INFO L225 Difference]: With dead ends: 151 [2019-11-19 23:41:10,537 INFO L226 Difference]: Without dead ends: 144 [2019-11-19 23:41:10,539 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 [2019-11-19 23:41:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-19 23:41:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-11-19 23:41:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-19 23:41:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2019-11-19 23:41:10,625 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 12 [2019-11-19 23:41:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:41:10,626 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2019-11-19 23:41:10,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 23:41:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2019-11-19 23:41:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 23:41:10,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:41:10,626 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:41:10,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:41:10,828 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:41:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:41:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash 759824207, now seen corresponding path program 1 times [2019-11-19 23:41:10,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:41:10,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1022999882] [2019-11-19 23:41:10,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:41:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:41:11,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:41:11,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:41:11,093 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 [2019-11-19 23:41:11,094 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:11,105 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:11,105 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:41:11,106 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:41:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:11,118 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:41:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:11,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1022999882] [2019-11-19 23:41:11,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:41:11,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 23:41:11,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591180018] [2019-11-19 23:41:11,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:41:11,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:41:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:41:11,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:41:11,188 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand 4 states. [2019-11-19 23:41:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:41:11,894 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2019-11-19 23:41:11,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:41:11,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-19 23:41:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:41:11,899 INFO L225 Difference]: With dead ends: 141 [2019-11-19 23:41:11,899 INFO L226 Difference]: Without dead ends: 141 [2019-11-19 23:41:11,900 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 [2019-11-19 23:41:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-19 23:41:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2019-11-19 23:41:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-19 23:41:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 148 transitions. [2019-11-19 23:41:11,917 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 148 transitions. Word has length 12 [2019-11-19 23:41:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:41:11,917 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 148 transitions. [2019-11-19 23:41:11,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:41:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 148 transitions. [2019-11-19 23:41:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-19 23:41:11,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:41:11,919 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] [2019-11-19 23:41:12,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:41:12,122 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:41:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:41:12,123 INFO L82 PathProgramCache]: Analyzing trace with hash -278256466, now seen corresponding path program 1 times [2019-11-19 23:41:12,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:41:12,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [193095223] [2019-11-19 23:41:12,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:41:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:41:12,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:41:12,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:41:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:12,450 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:41:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:12,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [193095223] [2019-11-19 23:41:12,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:41:12,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-19 23:41:12,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734275657] [2019-11-19 23:41:12,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:41:12,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:41:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:41:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:41:12,494 INFO L87 Difference]: Start difference. First operand 141 states and 148 transitions. Second operand 8 states. [2019-11-19 23:41:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:41:12,623 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2019-11-19 23:41:12,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:41:12,624 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-19 23:41:12,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:41:12,627 INFO L225 Difference]: With dead ends: 152 [2019-11-19 23:41:12,627 INFO L226 Difference]: Without dead ends: 152 [2019-11-19 23:41:12,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:41:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-19 23:41:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 142. [2019-11-19 23:41:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-19 23:41:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2019-11-19 23:41:12,646 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 20 [2019-11-19 23:41:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:41:12,646 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2019-11-19 23:41:12,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:41:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2019-11-19 23:41:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-19 23:41:12,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:41:12,648 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] [2019-11-19 23:41:12,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:41:12,852 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:41:12,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:41:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2106086729, now seen corresponding path program 1 times [2019-11-19 23:41:12,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:41:12,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [109462528] [2019-11-19 23:41:12,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:41:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:41:13,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 23:41:13,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:41:13,189 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 [2019-11-19 23:41:13,189 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:13,198 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:13,198 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:41:13,198 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:41:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:41:13,278 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:41:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:41:13,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [109462528] [2019-11-19 23:41:13,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:41:13,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-19 23:41:13,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987222359] [2019-11-19 23:41:13,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:41:13,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:41:13,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:41:13,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:41:13,738 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 10 states. [2019-11-19 23:41:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:41:15,499 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-19 23:41:15,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:41:15,504 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-19 23:41:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:41:15,507 INFO L225 Difference]: With dead ends: 142 [2019-11-19 23:41:15,508 INFO L226 Difference]: Without dead ends: 142 [2019-11-19 23:41:15,508 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 [2019-11-19 23:41:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-19 23:41:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2019-11-19 23:41:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-19 23:41:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 148 transitions. [2019-11-19 23:41:15,533 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 148 transitions. Word has length 30 [2019-11-19 23:41:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:41:15,534 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 148 transitions. [2019-11-19 23:41:15,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:41:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 148 transitions. [2019-11-19 23:41:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-19 23:41:15,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:41:15,536 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] [2019-11-19 23:41:15,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:41:15,740 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:41:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:41:15,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2106086730, now seen corresponding path program 1 times [2019-11-19 23:41:15,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:41:15,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1096946826] [2019-11-19 23:41:15,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:41:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:41:16,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:41:16,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:41:16,010 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 [2019-11-19 23:41:16,010 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:16,013 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:16,014 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:41:16,014 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:41:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:41:16,048 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:41:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:41:16,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1096946826] [2019-11-19 23:41:16,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:41:16,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-19 23:41:16,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576735439] [2019-11-19 23:41:16,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:41:16,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:41:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:41:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:41:16,151 INFO L87 Difference]: Start difference. First operand 141 states and 148 transitions. Second operand 6 states. [2019-11-19 23:41:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:41:16,800 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2019-11-19 23:41:16,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:41:16,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-19 23:41:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:41:16,808 INFO L225 Difference]: With dead ends: 141 [2019-11-19 23:41:16,808 INFO L226 Difference]: Without dead ends: 141 [2019-11-19 23:41:16,809 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 [2019-11-19 23:41:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-19 23:41:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-19 23:41:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-19 23:41:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 147 transitions. [2019-11-19 23:41:16,819 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 147 transitions. Word has length 30 [2019-11-19 23:41:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:41:16,819 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 147 transitions. [2019-11-19 23:41:16,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:41:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 147 transitions. [2019-11-19 23:41:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-19 23:41:16,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:41:16,820 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] [2019-11-19 23:41:17,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:41:17,023 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:41:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:41:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1019751465, now seen corresponding path program 1 times [2019-11-19 23:41:17,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:41:17,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1188445445] [2019-11-19 23:41:17,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:41:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:41:17,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 23:41:17,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:41:17,304 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 [2019-11-19 23:41:17,305 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:17,307 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:17,307 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:41:17,307 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:41:17,413 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:17,414 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 [2019-11-19 23:41:17,415 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:17,438 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-19 23:41:17,439 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. [2019-11-19 23:41:17,439 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-19 23:41:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:17,454 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:41:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:17,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1188445445] [2019-11-19 23:41:17,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:41:17,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-19 23:41:17,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827529635] [2019-11-19 23:41:17,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 23:41:17,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:41:17,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 23:41:17,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:41:17,672 INFO L87 Difference]: Start difference. First operand 140 states and 147 transitions. Second operand 9 states. [2019-11-19 23:41:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:41:29,909 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2019-11-19 23:41:29,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 23:41:29,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-19 23:41:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:41:29,911 INFO L225 Difference]: With dead ends: 181 [2019-11-19 23:41:29,911 INFO L226 Difference]: Without dead ends: 181 [2019-11-19 23:41:29,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:41:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-19 23:41:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 145. [2019-11-19 23:41:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-19 23:41:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2019-11-19 23:41:29,932 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 32 [2019-11-19 23:41:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:41:29,933 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2019-11-19 23:41:29,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 23:41:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2019-11-19 23:41:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-19 23:41:29,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:41:29,935 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] [2019-11-19 23:41:30,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:41:30,138 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:41:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:41:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1019751464, now seen corresponding path program 1 times [2019-11-19 23:41:30,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:41:30,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [223376131] [2019-11-19 23:41:30,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:41:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:41:30,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 23:41:30,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:41:30,464 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 [2019-11-19 23:41:30,464 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:30,473 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:30,482 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 [2019-11-19 23:41:30,482 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:30,494 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:30,494 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:41:30,494 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-19 23:41:30,722 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:30,723 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 [2019-11-19 23:41:30,723 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:30,735 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:30,739 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 [2019-11-19 23:41:30,740 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:41:30,752 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:41:30,753 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. [2019-11-19 23:41:30,753 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:20 [2019-11-19 23:41:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:30,799 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:41:30,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:41:31,174 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-11-19 23:41:31,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:41:31,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:41:31,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:41:31,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:41:31,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:41:31,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:41:31,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:41:31,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:41:35,785 WARN L191 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2019-11-19 23:41:35,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:41:38,590 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-11-19 23:41:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:41:39,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223376131] [2019-11-19 23:41:39,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:41:39,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-19 23:41:39,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169771398] [2019-11-19 23:41:39,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 23:41:39,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:41:39,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 23:41:39,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2019-11-19 23:41:39,529 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand 16 states. [2019-11-19 23:41:44,808 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 [2019-11-19 23:42:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:42:10,738 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2019-11-19 23:42:10,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 23:42:10,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-11-19 23:42:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:42:10,742 INFO L225 Difference]: With dead ends: 167 [2019-11-19 23:42:10,742 INFO L226 Difference]: Without dead ends: 167 [2019-11-19 23:42:10,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=82, Invalid=382, Unknown=2, NotChecked=40, Total=506 [2019-11-19 23:42:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-19 23:42:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 145. [2019-11-19 23:42:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-19 23:42:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2019-11-19 23:42:10,752 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 32 [2019-11-19 23:42:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:42:10,753 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2019-11-19 23:42:10,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 23:42:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2019-11-19 23:42:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-19 23:42:10,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:42:10,755 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] [2019-11-19 23:42:10,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:42:10,959 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:42:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:42:10,959 INFO L82 PathProgramCache]: Analyzing trace with hash -728460306, now seen corresponding path program 1 times [2019-11-19 23:42:10,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:42:10,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1627480477] [2019-11-19 23:42:10,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:42:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:42:11,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:42:11,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:42:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:11,194 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:42:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:11,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1627480477] [2019-11-19 23:42:11,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:42:11,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-19 23:42:11,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703418582] [2019-11-19 23:42:11,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:42:11,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:42:11,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:42:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:42:11,257 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand 6 states. [2019-11-19 23:42:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:42:11,435 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2019-11-19 23:42:11,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:42:11,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-11-19 23:42:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:42:11,438 INFO L225 Difference]: With dead ends: 146 [2019-11-19 23:42:11,438 INFO L226 Difference]: Without dead ends: 146 [2019-11-19 23:42:11,438 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 [2019-11-19 23:42:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-19 23:42:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-11-19 23:42:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-19 23:42:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 153 transitions. [2019-11-19 23:42:11,446 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 153 transitions. Word has length 34 [2019-11-19 23:42:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:42:11,447 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 153 transitions. [2019-11-19 23:42:11,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:42:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 153 transitions. [2019-11-19 23:42:11,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-19 23:42:11,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:42:11,449 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] [2019-11-19 23:42:11,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:42:11,652 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:42:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:42:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1112213701, now seen corresponding path program 1 times [2019-11-19 23:42:11,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:42:11,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1356619818] [2019-11-19 23:42:11,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:42:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:42:12,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 23:42:12,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:42:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:12,059 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:42:12,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:42:12,126 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 [2019-11-19 23:42:12,127 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:42:12,142 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 [2019-11-19 23:42:12,143 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:42:12,162 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:12,163 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 [2019-11-19 23:42:12,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:12,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:12,164 INFO L496 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 23:42:12,226 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:12,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:12,228 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 3 xjuncts. [2019-11-19 23:42:12,228 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:43 [2019-11-19 23:42:12,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:12,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:12,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:12,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:12,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:12,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:13,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1356619818] [2019-11-19 23:42:13,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:42:13,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-19 23:42:13,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297477539] [2019-11-19 23:42:13,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 23:42:13,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:42:13,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 23:42:13,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:42:13,488 INFO L87 Difference]: Start difference. First operand 145 states and 153 transitions. Second operand 12 states. [2019-11-19 23:42:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:42:14,387 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2019-11-19 23:42:14,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 23:42:14,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-19 23:42:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:42:14,391 INFO L225 Difference]: With dead ends: 156 [2019-11-19 23:42:14,391 INFO L226 Difference]: Without dead ends: 156 [2019-11-19 23:42:14,391 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-19 23:42:14,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-19 23:42:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2019-11-19 23:42:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-19 23:42:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2019-11-19 23:42:14,398 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 35 [2019-11-19 23:42:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:42:14,398 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2019-11-19 23:42:14,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 23:42:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2019-11-19 23:42:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-19 23:42:14,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:42:14,399 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] [2019-11-19 23:42:14,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:42:14,604 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:42:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:42:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1112213702, now seen corresponding path program 1 times [2019-11-19 23:42:14,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:42:14,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [472850889] [2019-11-19 23:42:14,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:42:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:42:14,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 23:42:14,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:42:14,901 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 [2019-11-19 23:42:14,902 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:14,904 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:14,904 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:42:14,904 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:5, output treesize:1 [2019-11-19 23:42:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-19 23:42:14,916 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:42:14,924 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:14,924 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 [2019-11-19 23:42:14,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:14,926 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:14,929 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:14,929 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:42:14,929 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:3 [2019-11-19 23:42:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-19 23:42:14,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [472850889] [2019-11-19 23:42:14,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:42:14,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-19 23:42:14,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128014224] [2019-11-19 23:42:14,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:42:14,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:42:14,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:42:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:42:14,986 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand 4 states. [2019-11-19 23:42:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:42:15,288 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2019-11-19 23:42:15,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:42:15,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-11-19 23:42:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:42:15,290 INFO L225 Difference]: With dead ends: 149 [2019-11-19 23:42:15,291 INFO L226 Difference]: Without dead ends: 149 [2019-11-19 23:42:15,291 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 [2019-11-19 23:42:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-19 23:42:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-19 23:42:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-19 23:42:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 157 transitions. [2019-11-19 23:42:15,297 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 157 transitions. Word has length 35 [2019-11-19 23:42:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:42:15,297 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 157 transitions. [2019-11-19 23:42:15,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:42:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 157 transitions. [2019-11-19 23:42:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-19 23:42:15,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:42:15,299 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] [2019-11-19 23:42:15,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:42:15,503 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:42:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:42:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash -118886391, now seen corresponding path program 1 times [2019-11-19 23:42:15,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:42:15,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [200451911] [2019-11-19 23:42:15,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:42:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:42:15,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 23:42:15,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:42:15,814 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 [2019-11-19 23:42:15,814 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:15,817 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:15,817 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:42:15,817 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:42:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:15,870 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:42:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:15,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [200451911] [2019-11-19 23:42:15,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:42:15,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-19 23:42:15,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031077193] [2019-11-19 23:42:15,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 23:42:15,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:42:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 23:42:15,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:42:15,941 INFO L87 Difference]: Start difference. First operand 148 states and 157 transitions. Second operand 7 states. [2019-11-19 23:42:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:42:16,697 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2019-11-19 23:42:16,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:42:16,697 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-19 23:42:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:42:16,699 INFO L225 Difference]: With dead ends: 148 [2019-11-19 23:42:16,699 INFO L226 Difference]: Without dead ends: 148 [2019-11-19 23:42:16,699 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 [2019-11-19 23:42:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-19 23:42:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2019-11-19 23:42:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-19 23:42:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 156 transitions. [2019-11-19 23:42:16,705 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 156 transitions. Word has length 36 [2019-11-19 23:42:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:42:16,705 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 156 transitions. [2019-11-19 23:42:16,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 23:42:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 156 transitions. [2019-11-19 23:42:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-19 23:42:16,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:42:16,707 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] [2019-11-19 23:42:16,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:42:16,911 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:42:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:42:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash -118886390, now seen corresponding path program 1 times [2019-11-19 23:42:16,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:42:16,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [825454831] [2019-11-19 23:42:16,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:42:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:42:17,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 23:42:17,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:42:17,206 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 [2019-11-19 23:42:17,206 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:17,216 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:17,216 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:42:17,217 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:42:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:17,279 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:42:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:17,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825454831] [2019-11-19 23:42:17,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:42:17,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-19 23:42:17,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081806131] [2019-11-19 23:42:17,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 23:42:17,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:42:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 23:42:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:42:17,763 INFO L87 Difference]: Start difference. First operand 147 states and 156 transitions. Second operand 12 states. [2019-11-19 23:42:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:42:19,717 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2019-11-19 23:42:19,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 23:42:19,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-19 23:42:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:42:19,723 INFO L225 Difference]: With dead ends: 147 [2019-11-19 23:42:19,723 INFO L226 Difference]: Without dead ends: 147 [2019-11-19 23:42:19,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:42:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-19 23:42:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2019-11-19 23:42:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-19 23:42:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 155 transitions. [2019-11-19 23:42:19,730 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 155 transitions. Word has length 36 [2019-11-19 23:42:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:42:19,730 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 155 transitions. [2019-11-19 23:42:19,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 23:42:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 155 transitions. [2019-11-19 23:42:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-19 23:42:19,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:42:19,732 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] [2019-11-19 23:42:19,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:42:19,937 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:42:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:42:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1275214564, now seen corresponding path program 1 times [2019-11-19 23:42:19,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:42:19,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [333118346] [2019-11-19 23:42:19,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:42:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:42:20,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:42:20,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:42:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-19 23:42:20,277 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:42:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-19 23:42:20,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333118346] [2019-11-19 23:42:20,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:42:20,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-19 23:42:20,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032499535] [2019-11-19 23:42:20,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:42:20,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:42:20,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:42:20,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:42:20,380 INFO L87 Difference]: Start difference. First operand 146 states and 155 transitions. Second operand 10 states. [2019-11-19 23:42:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:42:20,452 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2019-11-19 23:42:20,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:42:20,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2019-11-19 23:42:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:42:20,454 INFO L225 Difference]: With dead ends: 134 [2019-11-19 23:42:20,454 INFO L226 Difference]: Without dead ends: 134 [2019-11-19 23:42:20,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:42:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-19 23:42:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2019-11-19 23:42:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-19 23:42:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 139 transitions. [2019-11-19 23:42:20,461 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 139 transitions. Word has length 47 [2019-11-19 23:42:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:42:20,462 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 139 transitions. [2019-11-19 23:42:20,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:42:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 139 transitions. [2019-11-19 23:42:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-19 23:42:20,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:42:20,463 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] [2019-11-19 23:42:20,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:42:20,668 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, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_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]=== [2019-11-19 23:42:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:42:20,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1239360724, now seen corresponding path program 1 times [2019-11-19 23:42:20,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:42:20,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1057331583] [2019-11-19 23:42:20,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16ce84c0-2455-4108-ae4a-41d479d32b3e/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 [2019-11-19 23:42:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:42:21,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-19 23:42:21,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:42:21,234 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 [2019-11-19 23:42:21,235 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:21,242 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:21,246 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 [2019-11-19 23:42:21,246 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:21,253 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:21,253 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:42:21,254 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-19 23:42:21,517 INFO L392 ElimStorePlain]: Different costs {2=[|v_#length_BEFORE_CALL_9|], 4=[|v_#valid_BEFORE_CALL_12|]} [2019-11-19 23:42:21,529 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:42:21,531 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:42:21,533 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:42:21,534 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2019-11-19 23:42:21,535 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:21,564 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:21,579 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:42:21,580 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:42:21,590 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:21,590 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2019-11-19 23:42:21,591 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:21,614 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:21,615 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 23:42:21,615 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:23 [2019-11-19 23:42:22,002 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:42:22,002 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 90 [2019-11-19 23:42:22,003 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:42:22,085 INFO L567 ElimStorePlain]: treesize reduction 38, result has 51.3 percent of original size [2019-11-19 23:42:22,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:22,086 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-19 23:42:22,086 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:31, output treesize:40 [2019-11-19 23:42:22,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:22,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:42:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 23:42:22,299 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:42:22,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:42:38,392 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 22 [2019-11-19 23:42:57,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:43:05,932 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-11-19 23:43:05,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-19 23:43:05,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:43:05,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:43:05,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:43:05,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:43:05,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:43:05,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:43:05,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:43:05,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:43:43,221 WARN L191 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2019-11-19 23:44:17,557 INFO L392 ElimStorePlain]: Different costs {7=[|v_old(#length)_BEFORE_CALL_3|], 8=[|v_old(#valid)_BEFORE_CALL_3|]} [2019-11-19 23:44:17,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:44:17,759 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-19 23:44:17,763 INFO L168 Benchmark]: Toolchain (without parser) took 190557.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 182.5 MB). Free memory was 946.1 MB in the beginning and 909.6 MB in the end (delta: 36.5 MB). Peak memory consumption was 218.9 MB. Max. memory is 11.5 GB. [2019-11-19 23:44:17,763 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:44:17,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 783.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -153.7 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-19 23:44:17,764 INFO L168 Benchmark]: Boogie Preprocessor took 117.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:44:17,764 INFO L168 Benchmark]: RCFGBuilder took 1365.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 76.3 MB). Peak memory consumption was 76.3 MB. Max. memory is 11.5 GB. [2019-11-19 23:44:17,765 INFO L168 Benchmark]: TraceAbstraction took 188286.16 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.0 GB in the beginning and 909.6 MB in the end (delta: 114.0 MB). Peak memory consumption was 173.7 MB. Max. memory is 11.5 GB. [2019-11-19 23:44:17,766 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 783.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -153.7 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 117.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 1365.02 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: 76.3 MB). Peak memory consumption was 76.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 188286.16 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.0 GB in the beginning and 909.6 MB in the end (delta: 114.0 MB). Peak memory consumption was 173.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...