./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.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_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/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 f68b319d77fa756392ca29e618a1e0accd9b6c9e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: incompatible size --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 11:09:20,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:09:20,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:09:20,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:09:20,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:09:20,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:09:20,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:09:21,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:09:21,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:09:21,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:09:21,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:09:21,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:09:21,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:09:21,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:09:21,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:09:21,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:09:21,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:09:21,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:09:21,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:09:21,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:09:21,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:09:21,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:09:21,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:09:21,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:09:21,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:09:21,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:09:21,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:09:21,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:09:21,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:09:21,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:09:21,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:09:21,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:09:21,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:09:21,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:09:21,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:09:21,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:09:21,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:09:21,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:09:21,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:09:21,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:09:21,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:09:21,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 11:09:21,088 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:09:21,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:09:21,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:09:21,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:09:21,102 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:09:21,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:09:21,103 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:09:21,103 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 11:09:21,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:09:21,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:09:21,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:09:21,104 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 11:09:21,104 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 11:09:21,104 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 11:09:21,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 11:09:21,105 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 11:09:21,105 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 11:09:21,106 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:09:21,106 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:09:21,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:09:21,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:09:21,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 11:09:21,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 11:09:21,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:09:21,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:09:21,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 11:09:21,108 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 11:09:21,108 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 11:09:21,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 11:09:21,110 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_4e94e38d-29ee-4887-bd1c-f910db962e56/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 -> f68b319d77fa756392ca29e618a1e0accd9b6c9e [2019-11-20 11:09:21,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:09:21,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:09:21,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:09:21,314 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:09:21,315 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:09:21,316 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2019-11-20 11:09:21,399 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/data/78ac3bf4f/ef4ff360be4448a297635d3e1b75cb57/FLAGee9e52007 [2019-11-20 11:09:21,840 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:09:21,841 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2019-11-20 11:09:21,857 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/data/78ac3bf4f/ef4ff360be4448a297635d3e1b75cb57/FLAGee9e52007 [2019-11-20 11:09:22,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/data/78ac3bf4f/ef4ff360be4448a297635d3e1b75cb57 [2019-11-20 11:09:22,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:09:22,126 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 11:09:22,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:09:22,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:09:22,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:09:22,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7b3d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22, skipping insertion in model container [2019-11-20 11:09:22,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,142 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:09:22,189 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:09:22,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:09:22,674 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:09:22,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:09:22,768 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:09:22,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22 WrapperNode [2019-11-20 11:09:22,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:09:22,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:09:22,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:09:22,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:09:22,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (1/1) ... [2019-11-20 11:09:22,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:09:22,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:09:22,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:09:22,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:09:22,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:09:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 11:09:22,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:09:22,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 11:09:22,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 11:09:22,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 11:09:22,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 11:09:22,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 11:09:22,927 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2019-11-20 11:09:22,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 11:09:22,928 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 11:09:22,928 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 11:09:22,928 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 11:09:22,929 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 11:09:22,929 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 11:09:22,929 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 11:09:22,929 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 11:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 11:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 11:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 11:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 11:09:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 11:09:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 11:09:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 11:09:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 11:09:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 11:09:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 11:09:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 11:09:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 11:09:22,933 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 11:09:22,933 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 11:09:22,933 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 11:09:22,933 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 11:09:22,934 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 11:09:22,934 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 11:09:22,934 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 11:09:22,934 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 11:09:22,934 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 11:09:22,935 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 11:09:22,935 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 11:09:22,935 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 11:09:22,935 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 11:09:22,935 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 11:09:22,936 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 11:09:22,936 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 11:09:22,936 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 11:09:22,936 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 11:09:22,937 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 11:09:22,937 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 11:09:22,937 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 11:09:22,937 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 11:09:22,937 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 11:09:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 11:09:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 11:09:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 11:09:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 11:09:22,938 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 11:09:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 11:09:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 11:09:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 11:09:22,939 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 11:09:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 11:09:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 11:09:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 11:09:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 11:09:22,940 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 11:09:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 11:09:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 11:09:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 11:09:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 11:09:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 11:09:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 11:09:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 11:09:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 11:09:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 11:09:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 11:09:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 11:09:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 11:09:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 11:09:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 11:09:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 11:09:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 11:09:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 11:09:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 11:09:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 11:09:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 11:09:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 11:09:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 11:09:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 11:09:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 11:09:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 11:09:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 11:09:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 11:09:22,946 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 11:09:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 11:09:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 11:09:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 11:09:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 11:09:22,947 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 11:09:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 11:09:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 11:09:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 11:09:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 11:09:22,948 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 11:09:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 11:09:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 11:09:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 11:09:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 11:09:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 11:09:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 11:09:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 11:09:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 11:09:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 11:09:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 11:09:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 11:09:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 11:09:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 11:09:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 11:09:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-20 11:09:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2019-11-20 11:09:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 11:09:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 11:09:22,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 11:09:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 11:09:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 11:09:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 11:09:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:09:23,836 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:09:23,836 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 11:09:23,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:09:23 BoogieIcfgContainer [2019-11-20 11:09:23,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:09:23,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 11:09:23,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 11:09:23,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 11:09:23,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:09:22" (1/3) ... [2019-11-20 11:09:23,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b60ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:09:23, skipping insertion in model container [2019-11-20 11:09:23,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:22" (2/3) ... [2019-11-20 11:09:23,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b60ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:09:23, skipping insertion in model container [2019-11-20 11:09:23,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:09:23" (3/3) ... [2019-11-20 11:09:23,851 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2019-11-20 11:09:23,862 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 11:09:23,870 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2019-11-20 11:09:23,883 INFO L249 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2019-11-20 11:09:23,903 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 11:09:23,903 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 11:09:23,904 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 11:09:23,904 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:09:23,904 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:09:23,904 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 11:09:23,905 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:09:23,905 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 11:09:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2019-11-20 11:09:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 11:09:23,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:23,935 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:23,936 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:23,942 INFO L82 PathProgramCache]: Analyzing trace with hash -568922052, now seen corresponding path program 1 times [2019-11-20 11:09:23,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:23,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2079767973] [2019-11-20 11:09:23,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:24,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 11:09:24,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:24,379 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 11:09:24,380 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 19 treesize of output 18 [2019-11-20 11:09:24,381 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:24,393 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:24,395 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:24,395 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-11-20 11:09:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:24,422 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:24,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2079767973] [2019-11-20 11:09:24,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:24,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 11:09:24,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651713108] [2019-11-20 11:09:24,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 11:09:24,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 11:09:24,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 11:09:24,478 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 4 states. [2019-11-20 11:09:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:24,665 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2019-11-20 11:09:24,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 11:09:24,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 11:09:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:24,676 INFO L225 Difference]: With dead ends: 56 [2019-11-20 11:09:24,676 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 11:09:24,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 11:09:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 11:09:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-20 11:09:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 11:09:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2019-11-20 11:09:24,720 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 11 [2019-11-20 11:09:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:24,720 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2019-11-20 11:09:24,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 11:09:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2019-11-20 11:09:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 11:09:24,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:24,722 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:24,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:24,925 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash -568922051, now seen corresponding path program 1 times [2019-11-20 11:09:24,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:24,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1531169939] [2019-11-20 11:09:24,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:25,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 11:09:25,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:25,183 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_38|]} [2019-11-20 11:09:25,192 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:09:25,194 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:09:25,194 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:25,229 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:25,244 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 10 treesize of output 8 [2019-11-20 11:09:25,244 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:25,283 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:25,284 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:25,284 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2019-11-20 11:09:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:25,324 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:25,457 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 11:09:25,471 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 10 treesize of output 8 [2019-11-20 11:09:25,472 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:25,490 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:25,494 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 11:09:25,495 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:25,506 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:25,507 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:25,508 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2019-11-20 11:09:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:25,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531169939] [2019-11-20 11:09:25,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:25,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 11:09:25,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749641655] [2019-11-20 11:09:25,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 11:09:25,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 11:09:25,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:09:25,527 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 5 states. [2019-11-20 11:09:26,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:26,138 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2019-11-20 11:09:26,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 11:09:26,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-20 11:09:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:26,143 INFO L225 Difference]: With dead ends: 73 [2019-11-20 11:09:26,144 INFO L226 Difference]: Without dead ends: 73 [2019-11-20 11:09:26,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:09:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-20 11:09:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2019-11-20 11:09:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-20 11:09:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2019-11-20 11:09:26,170 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2019-11-20 11:09:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:26,171 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2019-11-20 11:09:26,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 11:09:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2019-11-20 11:09:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 11:09:26,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:26,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:26,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:26,377 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1273294668, now seen corresponding path program 1 times [2019-11-20 11:09:26,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:26,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1993334381] [2019-11-20 11:09:26,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:26,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 11:09:26,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:26,661 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_27|], 1=[|v_#valid_43|]} [2019-11-20 11:09:26,672 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:09:26,674 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:09:26,674 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:26,704 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:26,719 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 10 treesize of output 8 [2019-11-20 11:09:26,720 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:26,752 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:26,753 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:26,754 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-20 11:09:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:26,852 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:27,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 11:09:27,092 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 11:09:27,097 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:09:27,099 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:27,118 INFO L567 ElimStorePlain]: treesize reduction 18, result has 21.7 percent of original size [2019-11-20 11:09:27,118 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 11:09:27,119 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:27,119 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:5 [2019-11-20 11:09:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:27,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993334381] [2019-11-20 11:09:27,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:27,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 11:09:27,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697333367] [2019-11-20 11:09:27,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 11:09:27,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:27,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 11:09:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:09:27,166 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 8 states. [2019-11-20 11:09:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:27,859 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-11-20 11:09:27,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:09:27,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-20 11:09:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:27,861 INFO L225 Difference]: With dead ends: 71 [2019-11-20 11:09:27,862 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 11:09:27,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:09:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 11:09:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2019-11-20 11:09:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 11:09:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-11-20 11:09:27,869 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 13 [2019-11-20 11:09:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:27,869 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-11-20 11:09:27,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 11:09:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-11-20 11:09:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 11:09:27,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:27,871 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:28,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:28,073 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:28,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1273294616, now seen corresponding path program 1 times [2019-11-20 11:09:28,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:28,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [951453435] [2019-11-20 11:09:28,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:28,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 11:09:28,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:28,303 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:28,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951453435] [2019-11-20 11:09:28,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:28,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 11:09:28,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256326481] [2019-11-20 11:09:28,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:09:28,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:09:28,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:09:28,358 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 6 states. [2019-11-20 11:09:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:28,481 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2019-11-20 11:09:28,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 11:09:28,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-20 11:09:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:28,483 INFO L225 Difference]: With dead ends: 72 [2019-11-20 11:09:28,483 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 11:09:28,484 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:09:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 11:09:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2019-11-20 11:09:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-20 11:09:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2019-11-20 11:09:28,494 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 13 [2019-11-20 11:09:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:28,494 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2019-11-20 11:09:28,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:09:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2019-11-20 11:09:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 11:09:28,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:28,496 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:28,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:28,697 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:28,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1216036314, now seen corresponding path program 1 times [2019-11-20 11:09:28,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:28,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1716358726] [2019-11-20 11:09:28,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:28,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 11:09:28,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:28,970 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 11:09:28,970 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 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:09:28,971 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:28,978 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:28,979 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:28,979 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 11:09:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:29,004 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:29,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1716358726] [2019-11-20 11:09:29,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:29,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 11:09:29,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407144001] [2019-11-20 11:09:29,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 11:09:29,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:29,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 11:09:29,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 11:09:29,013 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 3 states. [2019-11-20 11:09:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:29,096 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2019-11-20 11:09:29,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 11:09:29,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 11:09:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:29,099 INFO L225 Difference]: With dead ends: 61 [2019-11-20 11:09:29,099 INFO L226 Difference]: Without dead ends: 61 [2019-11-20 11:09:29,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 11:09:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-20 11:09:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-20 11:09:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-20 11:09:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-11-20 11:09:29,109 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2019-11-20 11:09:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:29,109 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-11-20 11:09:29,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 11:09:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-11-20 11:09:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 11:09:29,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:29,110 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:29,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:29,311 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:29,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1216036313, now seen corresponding path program 1 times [2019-11-20 11:09:29,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:29,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [89958426] [2019-11-20 11:09:29,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:29,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:09:29,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:29,521 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:29,521 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:09:29,522 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:29,574 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 11:09:29,575 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:29,575 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2019-11-20 11:09:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:29,640 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:29,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [89958426] [2019-11-20 11:09:29,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:29,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 11:09:29,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233032018] [2019-11-20 11:09:29,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 11:09:29,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:29,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 11:09:29,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:09:29,803 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2019-11-20 11:09:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:30,420 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2019-11-20 11:09:30,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:09:30,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-20 11:09:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:30,423 INFO L225 Difference]: With dead ends: 72 [2019-11-20 11:09:30,423 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 11:09:30,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:09:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 11:09:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2019-11-20 11:09:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-20 11:09:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2019-11-20 11:09:30,439 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 13 [2019-11-20 11:09:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:30,439 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2019-11-20 11:09:30,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 11:09:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2019-11-20 11:09:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 11:09:30,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:30,441 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:30,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:30,651 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:30,651 INFO L82 PathProgramCache]: Analyzing trace with hash -817429008, now seen corresponding path program 1 times [2019-11-20 11:09:30,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:30,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1675180712] [2019-11-20 11:09:30,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:30,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:09:30,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:30,848 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:30,848 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:09:30,849 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:30,884 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-20 11:09:30,885 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:30,886 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:14 [2019-11-20 11:09:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:30,899 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:31,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675180712] [2019-11-20 11:09:31,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:31,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 11:09:31,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450305761] [2019-11-20 11:09:31,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:09:31,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:09:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:09:31,015 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 6 states. [2019-11-20 11:09:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:31,369 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2019-11-20 11:09:31,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:09:31,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 11:09:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:31,371 INFO L225 Difference]: With dead ends: 69 [2019-11-20 11:09:31,371 INFO L226 Difference]: Without dead ends: 69 [2019-11-20 11:09:31,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:09:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-20 11:09:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2019-11-20 11:09:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 11:09:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-11-20 11:09:31,378 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 14 [2019-11-20 11:09:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:31,378 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-11-20 11:09:31,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:09:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-11-20 11:09:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 11:09:31,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:31,379 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:31,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:31,580 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash 478071552, now seen corresponding path program 1 times [2019-11-20 11:09:31,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:31,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1317359996] [2019-11-20 11:09:31,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:31,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 11:09:31,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:31,774 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_35|], 1=[|v_#valid_65|]} [2019-11-20 11:09:31,784 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:09:31,786 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:09:31,786 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:31,807 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:31,815 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 10 treesize of output 8 [2019-11-20 11:09:31,815 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:31,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:31,836 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:31,837 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-20 11:09:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:31,945 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:32,484 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 11:09:32,496 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:09:32,498 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:32,499 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:32,499 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 11:09:32,499 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:32,500 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2019-11-20 11:09:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:32,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317359996] [2019-11-20 11:09:32,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:09:32,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 11:09:32,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931661907] [2019-11-20 11:09:32,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 11:09:32,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 11:09:32,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:09:32,508 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 10 states. [2019-11-20 11:09:32,785 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-11-20 11:09:33,616 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 11:09:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:34,441 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2019-11-20 11:09:34,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 11:09:34,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-20 11:09:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:34,445 INFO L225 Difference]: With dead ends: 126 [2019-11-20 11:09:34,445 INFO L226 Difference]: Without dead ends: 126 [2019-11-20 11:09:34,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 11:09:34,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-20 11:09:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 78. [2019-11-20 11:09:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-20 11:09:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2019-11-20 11:09:34,454 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 15 [2019-11-20 11:09:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:34,454 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2019-11-20 11:09:34,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 11:09:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2019-11-20 11:09:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:09:34,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:34,456 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:34,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:34,656 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash 437037254, now seen corresponding path program 1 times [2019-11-20 11:09:34,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:34,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [190974427] [2019-11-20 11:09:34,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:34,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 11:09:34,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:34,858 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:34,867 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 10 [2019-11-20 11:09:34,868 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:34,870 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:34,870 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:34,870 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-20 11:09:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:34,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [190974427] [2019-11-20 11:09:34,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:34,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-20 11:09:34,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830675517] [2019-11-20 11:09:34,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 11:09:34,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:34,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 11:09:34,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:09:34,881 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 5 states. [2019-11-20 11:09:35,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:35,026 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2019-11-20 11:09:35,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 11:09:35,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-20 11:09:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:35,029 INFO L225 Difference]: With dead ends: 76 [2019-11-20 11:09:35,029 INFO L226 Difference]: Without dead ends: 76 [2019-11-20 11:09:35,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:09:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-20 11:09:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-20 11:09:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-20 11:09:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2019-11-20 11:09:35,036 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 17 [2019-11-20 11:09:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:35,037 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2019-11-20 11:09:35,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 11:09:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2019-11-20 11:09:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:09:35,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:35,038 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:35,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:35,250 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:35,250 INFO L82 PathProgramCache]: Analyzing trace with hash 437037255, now seen corresponding path program 1 times [2019-11-20 11:09:35,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:35,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1952448390] [2019-11-20 11:09:35,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:35,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 11:09:35,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:35,597 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:35,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 11:09:35,897 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 21 treesize of output 19 [2019-11-20 11:09:35,898 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:35,915 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 19 treesize of output 17 [2019-11-20 11:09:35,916 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:35,930 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 23 treesize of output 19 [2019-11-20 11:09:35,931 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:36,010 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:36,011 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-20 11:09:36,012 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:64, output treesize:56 [2019-11-20 11:09:36,285 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2019-11-20 11:09:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:36,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952448390] [2019-11-20 11:09:36,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:36,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 11:09:36,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192010449] [2019-11-20 11:09:36,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:09:36,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:36,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:09:36,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:09:36,375 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 12 states. [2019-11-20 11:09:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:37,227 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2019-11-20 11:09:37,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 11:09:37,229 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-20 11:09:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:37,233 INFO L225 Difference]: With dead ends: 91 [2019-11-20 11:09:37,233 INFO L226 Difference]: Without dead ends: 91 [2019-11-20 11:09:37,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-20 11:09:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-20 11:09:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2019-11-20 11:09:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-20 11:09:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2019-11-20 11:09:37,240 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 17 [2019-11-20 11:09:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:37,240 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2019-11-20 11:09:37,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:09:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2019-11-20 11:09:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:09:37,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:37,242 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:37,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:37,455 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 92671082, now seen corresponding path program 1 times [2019-11-20 11:09:37,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:37,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [511908089] [2019-11-20 11:09:37,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:37,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 11:09:37,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:37,674 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:37,675 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:09:37,675 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:37,780 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2019-11-20 11:09:37,781 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 11:09:37,781 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:37,782 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2019-11-20 11:09:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:37,929 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:38,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [511908089] [2019-11-20 11:09:38,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:09:38,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 11:09:38,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338197304] [2019-11-20 11:09:38,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:09:38,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:38,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:09:38,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:09:38,625 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 12 states. [2019-11-20 11:09:39,479 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-11-20 11:09:39,686 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2019-11-20 11:09:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:40,125 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2019-11-20 11:09:40,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 11:09:40,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-20 11:09:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:40,127 INFO L225 Difference]: With dead ends: 93 [2019-11-20 11:09:40,127 INFO L226 Difference]: Without dead ends: 93 [2019-11-20 11:09:40,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-11-20 11:09:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-20 11:09:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2019-11-20 11:09:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-20 11:09:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2019-11-20 11:09:40,132 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 17 [2019-11-20 11:09:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:40,133 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2019-11-20 11:09:40,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:09:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2019-11-20 11:09:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 11:09:40,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:40,134 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:40,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:40,337 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash -913994489, now seen corresponding path program 1 times [2019-11-20 11:09:40,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:40,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1727213074] [2019-11-20 11:09:40,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:40,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:09:40,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:40,539 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 11:09:40,539 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 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:09:40,540 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:40,546 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:40,547 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:40,547 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 11:09:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:40,598 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:40,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727213074] [2019-11-20 11:09:40,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:40,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 6 [2019-11-20 11:09:40,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129197781] [2019-11-20 11:09:40,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 11:09:40,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 11:09:40,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:09:40,674 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 7 states. [2019-11-20 11:09:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:40,870 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2019-11-20 11:09:40,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:09:40,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-20 11:09:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:40,871 INFO L225 Difference]: With dead ends: 72 [2019-11-20 11:09:40,871 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 11:09:40,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 11:09:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 11:09:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-11-20 11:09:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-20 11:09:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2019-11-20 11:09:40,876 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 19 [2019-11-20 11:09:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:40,876 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2019-11-20 11:09:40,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 11:09:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2019-11-20 11:09:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 11:09:40,877 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:40,877 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:41,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:41,078 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash -913994488, now seen corresponding path program 1 times [2019-11-20 11:09:41,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:41,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [282500493] [2019-11-20 11:09:41,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:41,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 11:09:41,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:41,292 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:41,292 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:09:41,293 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:41,318 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-20 11:09:41,319 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:41,319 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-20 11:09:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:41,390 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:41,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [282500493] [2019-11-20 11:09:41,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:41,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 11:09:41,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142527736] [2019-11-20 11:09:41,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:09:41,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:41,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:09:41,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:09:41,661 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 12 states. [2019-11-20 11:09:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:42,569 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2019-11-20 11:09:42,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 11:09:42,570 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-11-20 11:09:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:42,571 INFO L225 Difference]: With dead ends: 104 [2019-11-20 11:09:42,571 INFO L226 Difference]: Without dead ends: 104 [2019-11-20 11:09:42,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2019-11-20 11:09:42,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-20 11:09:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2019-11-20 11:09:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 11:09:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2019-11-20 11:09:42,577 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 19 [2019-11-20 11:09:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:42,577 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2019-11-20 11:09:42,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:09:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2019-11-20 11:09:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:09:42,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:42,578 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:42,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:42,779 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:42,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2119591432, now seen corresponding path program 1 times [2019-11-20 11:09:42,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:42,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [890973946] [2019-11-20 11:09:42,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:43,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:09:43,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:43,051 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:43,073 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 10 [2019-11-20 11:09:43,073 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:43,075 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:43,075 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:43,075 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-20 11:09:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:43,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890973946] [2019-11-20 11:09:43,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:43,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 11:09:43,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089412037] [2019-11-20 11:09:43,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:09:43,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:43,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:09:43,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:09:43,088 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 6 states. [2019-11-20 11:09:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:43,402 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2019-11-20 11:09:43,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:09:43,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-20 11:09:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:43,404 INFO L225 Difference]: With dead ends: 73 [2019-11-20 11:09:43,404 INFO L226 Difference]: Without dead ends: 73 [2019-11-20 11:09:43,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:09:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-20 11:09:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-11-20 11:09:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-20 11:09:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2019-11-20 11:09:43,408 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 21 [2019-11-20 11:09:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:43,409 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2019-11-20 11:09:43,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:09:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2019-11-20 11:09:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:09:43,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:43,410 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:43,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:43,611 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2119591433, now seen corresponding path program 1 times [2019-11-20 11:09:43,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:43,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [97108018] [2019-11-20 11:09:43,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:43,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 11:09:43,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:43,960 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:44,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 11:09:44,095 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2019-11-20 11:09:44,096 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:44,113 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-20 11:09:44,114 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:44,167 INFO L567 ElimStorePlain]: treesize reduction 7, result has 69.6 percent of original size [2019-11-20 11:09:44,168 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-20 11:09:44,168 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2019-11-20 11:09:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:44,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [97108018] [2019-11-20 11:09:44,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:44,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 11:09:44,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401516110] [2019-11-20 11:09:44,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:09:44,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:44,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:09:44,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:09:44,379 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 12 states. [2019-11-20 11:09:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:44,982 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2019-11-20 11:09:44,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 11:09:44,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-11-20 11:09:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:44,983 INFO L225 Difference]: With dead ends: 89 [2019-11-20 11:09:44,983 INFO L226 Difference]: Without dead ends: 89 [2019-11-20 11:09:44,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-11-20 11:09:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-20 11:09:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2019-11-20 11:09:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-20 11:09:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2019-11-20 11:09:44,988 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 21 [2019-11-20 11:09:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:44,988 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2019-11-20 11:09:44,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:09:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2019-11-20 11:09:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 11:09:44,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:44,990 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:45,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:45,190 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1112818005, now seen corresponding path program 1 times [2019-11-20 11:09:45,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:45,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2023421629] [2019-11-20 11:09:45,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:45,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 11:09:45,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:45,403 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 11:09:45,403 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 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:09:45,404 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:45,409 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:45,409 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:45,410 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 11:09:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:45,460 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:45,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2023421629] [2019-11-20 11:09:45,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:45,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 6 [2019-11-20 11:09:45,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633414989] [2019-11-20 11:09:45,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 11:09:45,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:45,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 11:09:45,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:09:45,501 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 7 states. [2019-11-20 11:09:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:45,739 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2019-11-20 11:09:45,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:09:45,740 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-11-20 11:09:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:45,741 INFO L225 Difference]: With dead ends: 71 [2019-11-20 11:09:45,741 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 11:09:45,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 11:09:45,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 11:09:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-20 11:09:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-20 11:09:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2019-11-20 11:09:45,747 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 23 [2019-11-20 11:09:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:45,747 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2019-11-20 11:09:45,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 11:09:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2019-11-20 11:09:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 11:09:45,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:45,752 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:45,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:45,955 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:45,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1112818006, now seen corresponding path program 1 times [2019-11-20 11:09:45,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:45,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1098515693] [2019-11-20 11:09:45,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:46,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 11:09:46,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:46,206 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:46,206 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:09:46,207 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:46,235 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-20 11:09:46,236 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:46,236 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-20 11:09:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:46,363 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:46,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098515693] [2019-11-20 11:09:46,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:09:46,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-20 11:09:46,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560197055] [2019-11-20 11:09:46,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 11:09:46,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:09:46,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 11:09:46,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-20 11:09:46,757 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 14 states. [2019-11-20 11:09:48,397 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 11:09:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:09:48,421 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2019-11-20 11:09:48,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 11:09:48,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2019-11-20 11:09:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:09:48,424 INFO L225 Difference]: With dead ends: 125 [2019-11-20 11:09:48,424 INFO L226 Difference]: Without dead ends: 125 [2019-11-20 11:09:48,425 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2019-11-20 11:09:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-20 11:09:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2019-11-20 11:09:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-20 11:09:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2019-11-20 11:09:48,430 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 23 [2019-11-20 11:09:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:09:48,431 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2019-11-20 11:09:48,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 11:09:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2019-11-20 11:09:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 11:09:48,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:09:48,433 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:09:48,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:48,633 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:09:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:09:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1112867735, now seen corresponding path program 1 times [2019-11-20 11:09:48,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:09:48,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [457596604] [2019-11-20 11:09:48,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e94e38d-29ee-4887-bd1c-f910db962e56/bin/uautomizer/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:09:48,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 11:09:48,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:09:48,881 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2019-11-20 11:09:48,881 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:09:48,888 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:48,889 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:09:48,889 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-20 11:09:49,099 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:49,099 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2019-11-20 11:09:49,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:09:49,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:09:49,102 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:09:49,119 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:09:49,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:09:49,120 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-20 11:09:49,120 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2019-11-20 11:09:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:09:49,156 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:09:49,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:09:49,662 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:152) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 11:09:49,665 INFO L168 Benchmark]: Toolchain (without parser) took 27539.45 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 318.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -184.4 MB). Peak memory consumption was 133.8 MB. Max. memory is 11.5 GB. [2019-11-20 11:09:49,665 INFO L168 Benchmark]: CDTParser took 0.90 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. [2019-11-20 11:09:49,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -177.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-11-20 11:09:49,666 INFO L168 Benchmark]: Boogie Preprocessor took 76.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:09:49,666 INFO L168 Benchmark]: RCFGBuilder took 991.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 55.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 11.5 GB. [2019-11-20 11:09:49,666 INFO L168 Benchmark]: TraceAbstraction took 25824.74 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 172.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -62.0 MB). Peak memory consumption was 109.9 MB. Max. memory is 11.5 GB. [2019-11-20 11:09:49,668 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90 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 642.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -177.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 76.35 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 991.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 55.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 25824.74 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 172.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -62.0 MB). Peak memory consumption was 109.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...