./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncmp-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_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 2d5a995d825785bc5dc95f3825623b1e4ecd07fe ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 06:02:43,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 06:02:43,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 06:02:43,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 06:02:43,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 06:02:43,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 06:02:43,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 06:02:43,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 06:02:43,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 06:02:43,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 06:02:43,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 06:02:43,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 06:02:43,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 06:02:43,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 06:02:43,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 06:02:43,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 06:02:43,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 06:02:43,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 06:02:43,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 06:02:43,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 06:02:43,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 06:02:43,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 06:02:43,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 06:02:43,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 06:02:43,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 06:02:43,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 06:02:43,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 06:02:43,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 06:02:43,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 06:02:43,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 06:02:43,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 06:02:43,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 06:02:43,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 06:02:43,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 06:02:43,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 06:02:43,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 06:02:43,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 06:02:43,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 06:02:43,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 06:02:43,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 06:02:43,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 06:02:43,489 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 06:02:43,514 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 06:02:43,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 06:02:43,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 06:02:43,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 06:02:43,518 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 06:02:43,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 06:02:43,519 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 06:02:43,519 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 06:02:43,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 06:02:43,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 06:02:43,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 06:02:43,521 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 06:02:43,521 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 06:02:43,521 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 06:02:43,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 06:02:43,522 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 06:02:43,522 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 06:02:43,522 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 06:02:43,523 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 06:02:43,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 06:02:43,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 06:02:43,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 06:02:43,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 06:02:43,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 06:02:43,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 06:02:43,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 06:02:43,528 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 06:02:43,528 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 06:02:43,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 06:02:43,528 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_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 -> 2d5a995d825785bc5dc95f3825623b1e4ecd07fe [2019-11-20 06:02:43,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 06:02:43,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 06:02:43,696 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 06:02:43,703 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 06:02:43,704 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 06:02:43,704 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2019-11-20 06:02:43,757 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/data/8108016e6/71e53bc84b534b1295d9cfcb4d419e7f/FLAGb09cf31e9 [2019-11-20 06:02:44,282 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 06:02:44,282 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2019-11-20 06:02:44,301 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/data/8108016e6/71e53bc84b534b1295d9cfcb4d419e7f/FLAGb09cf31e9 [2019-11-20 06:02:44,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/data/8108016e6/71e53bc84b534b1295d9cfcb4d419e7f [2019-11-20 06:02:44,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 06:02:44,778 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 06:02:44,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 06:02:44,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 06:02:44,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 06:02:44,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:02:44" (1/1) ... [2019-11-20 06:02:44,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300298ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:44, skipping insertion in model container [2019-11-20 06:02:44,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:02:44" (1/1) ... [2019-11-20 06:02:44,794 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 06:02:44,844 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 06:02:45,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 06:02:45,235 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 06:02:45,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 06:02:45,326 INFO L192 MainTranslator]: Completed translation [2019-11-20 06:02:45,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45 WrapperNode [2019-11-20 06:02:45,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 06:02:45,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 06:02:45,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 06:02:45,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 06:02:45,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (1/1) ... [2019-11-20 06:02:45,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (1/1) ... [2019-11-20 06:02:45,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (1/1) ... [2019-11-20 06:02:45,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (1/1) ... [2019-11-20 06:02:45,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (1/1) ... [2019-11-20 06:02:45,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (1/1) ... [2019-11-20 06:02:45,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (1/1) ... [2019-11-20 06:02:45,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 06:02:45,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 06:02:45,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 06:02:45,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 06:02:45,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 06:02:45,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 06:02:45,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 06:02:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 06:02:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 06:02:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 06:02:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 06:02:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 06:02:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncmp [2019-11-20 06:02:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 06:02:45,461 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 06:02:45,461 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 06:02:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 06:02:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 06:02:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 06:02:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 06:02:45,463 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 06:02:45,463 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 06:02:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 06:02:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 06:02:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 06:02:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 06:02:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 06:02:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 06:02:45,464 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 06:02:45,465 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 06:02:45,465 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 06:02:45,465 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 06:02:45,466 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 06:02:45,466 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 06:02:45,466 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 06:02:45,466 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 06:02:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 06:02:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 06:02:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 06:02:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 06:02:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 06:02:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 06:02:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 06:02:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 06:02:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 06:02:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 06:02:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 06:02:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 06:02:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 06:02:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 06:02:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 06:02:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 06:02:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 06:02:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 06:02:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 06:02:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 06:02:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 06:02:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 06:02:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 06:02:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 06:02:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 06:02:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 06:02:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 06:02:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 06:02:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 06:02:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 06:02:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 06:02:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 06:02:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 06:02:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 06:02:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 06:02:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 06:02:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 06:02:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 06:02:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 06:02:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 06:02:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 06:02:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 06:02:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 06:02:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 06:02:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 06:02:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 06:02:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 06:02:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 06:02:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 06:02:45,476 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 06:02:45,477 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 06:02:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 06:02:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 06:02:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 06:02:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 06:02:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 06:02:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 06:02:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 06:02:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 06:02:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 06:02:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 06:02:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 06:02:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 06:02:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 06:02:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 06:02:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 06:02:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 06:02:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 06:02:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 06:02:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 06:02:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 06:02:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 06:02:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 06:02:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 06:02:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 06:02:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 06:02:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 06:02:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 06:02:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 06:02:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 06:02:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 06:02:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 06:02:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 06:02:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 06:02:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 06:02:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 06:02:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-20 06:02:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncmp [2019-11-20 06:02:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 06:02:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 06:02:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 06:02:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 06:02:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 06:02:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 06:02:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 06:02:46,306 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 06:02:46,306 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 06:02:46,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:02:46 BoogieIcfgContainer [2019-11-20 06:02:46,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 06:02:46,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 06:02:46,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 06:02:46,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 06:02:46,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:02:44" (1/3) ... [2019-11-20 06:02:46,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe18b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:02:46, skipping insertion in model container [2019-11-20 06:02:46,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:02:45" (2/3) ... [2019-11-20 06:02:46,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe18b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:02:46, skipping insertion in model container [2019-11-20 06:02:46,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:02:46" (3/3) ... [2019-11-20 06:02:46,314 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2019-11-20 06:02:46,322 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 06:02:46,328 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2019-11-20 06:02:46,337 INFO L249 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2019-11-20 06:02:46,356 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 06:02:46,357 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 06:02:46,357 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 06:02:46,357 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 06:02:46,357 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 06:02:46,357 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 06:02:46,357 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 06:02:46,357 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 06:02:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2019-11-20 06:02:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 06:02:46,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:46,383 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:46,383 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:46,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1146826548, now seen corresponding path program 1 times [2019-11-20 06:02:46,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:46,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1013659951] [2019-11-20 06:02:46,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:46,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 06:02:46,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:46,709 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:46,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1013659951] [2019-11-20 06:02:46,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:46,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 06:02:46,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203443031] [2019-11-20 06:02:46,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 06:02:46,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:46,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 06:02:46,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 06:02:46,765 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 6 states. [2019-11-20 06:02:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:46,908 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2019-11-20 06:02:46,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 06:02:46,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-20 06:02:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:46,921 INFO L225 Difference]: With dead ends: 86 [2019-11-20 06:02:46,921 INFO L226 Difference]: Without dead ends: 82 [2019-11-20 06:02:46,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 06:02:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-20 06:02:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2019-11-20 06:02:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 06:02:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2019-11-20 06:02:46,989 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 11 [2019-11-20 06:02:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:46,990 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2019-11-20 06:02:46,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 06:02:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2019-11-20 06:02:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 06:02:46,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:46,991 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:47,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:47,200 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1148673590, now seen corresponding path program 1 times [2019-11-20 06:02:47,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:47,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1460695768] [2019-11-20 06:02:47,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:47,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 06:02:47,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:47,456 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_37|]} [2019-11-20 06:02:47,471 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 06:02:47,481 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 06:02:47,483 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:47,515 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:47,527 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 06:02:47,528 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:47,555 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:47,557 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 06:02:47,557 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2019-11-20 06:02:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:47,585 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:47,719 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 06:02:47,730 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 06:02:47,730 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:47,740 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:47,741 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 06:02:47,745 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:47,754 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:47,754 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 06:02:47,755 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2019-11-20 06:02:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:47,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460695768] [2019-11-20 06:02:47,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:47,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 06:02:47,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536224237] [2019-11-20 06:02:47,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 06:02:47,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 06:02:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 06:02:47,774 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 5 states. [2019-11-20 06:02:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:48,316 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2019-11-20 06:02:48,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 06:02:48,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-20 06:02:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:48,320 INFO L225 Difference]: With dead ends: 87 [2019-11-20 06:02:48,320 INFO L226 Difference]: Without dead ends: 87 [2019-11-20 06:02:48,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 06:02:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-20 06:02:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2019-11-20 06:02:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-20 06:02:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2019-11-20 06:02:48,330 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 11 [2019-11-20 06:02:48,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:48,330 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2019-11-20 06:02:48,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 06:02:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2019-11-20 06:02:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 06:02:48,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:48,331 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:48,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:48,534 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1148673589, now seen corresponding path program 1 times [2019-11-20 06:02:48,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:48,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1129633457] [2019-11-20 06:02:48,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:48,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 06:02:48,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:48,741 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 06:02:48,742 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 06:02:48,742 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:48,749 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:48,750 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 06:02:48,750 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 06:02:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:48,770 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:48,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1129633457] [2019-11-20 06:02:48,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:48,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 06:02:48,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216362404] [2019-11-20 06:02:48,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 06:02:48,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 06:02:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 06:02:48,780 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 3 states. [2019-11-20 06:02:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:48,896 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2019-11-20 06:02:48,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 06:02:48,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-20 06:02:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:48,898 INFO L225 Difference]: With dead ends: 65 [2019-11-20 06:02:48,898 INFO L226 Difference]: Without dead ends: 65 [2019-11-20 06:02:48,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 06:02:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-20 06:02:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-20 06:02:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 06:02:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2019-11-20 06:02:48,906 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 11 [2019-11-20 06:02:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:48,907 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2019-11-20 06:02:48,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 06:02:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2019-11-20 06:02:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 06:02:48,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:48,908 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:49,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:49,109 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:49,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1706333845, now seen corresponding path program 1 times [2019-11-20 06:02:49,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:49,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1034803809] [2019-11-20 06:02:49,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:49,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 06:02:49,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:49,326 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_47|]} [2019-11-20 06:02:49,332 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 06:02:49,334 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 06:02:49,334 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:49,352 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:49,360 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 06:02:49,360 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:49,376 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:49,393 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 06:02:49,393 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:14 [2019-11-20 06:02:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:49,407 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:49,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 06:02:49,483 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 06:02:49,498 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 06:02:49,499 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:49,507 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:49,507 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 06:02:49,507 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-11-20 06:02:49,508 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:11 [2019-11-20 06:02:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:49,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1034803809] [2019-11-20 06:02:49,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:49,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 06:02:49,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944131973] [2019-11-20 06:02:49,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 06:02:49,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:49,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 06:02:49,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 06:02:49,541 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 6 states. [2019-11-20 06:02:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:49,912 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2019-11-20 06:02:49,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 06:02:49,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-20 06:02:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:49,916 INFO L225 Difference]: With dead ends: 79 [2019-11-20 06:02:49,917 INFO L226 Difference]: Without dead ends: 79 [2019-11-20 06:02:49,917 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 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 06:02:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-20 06:02:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2019-11-20 06:02:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-20 06:02:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2019-11-20 06:02:49,923 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 13 [2019-11-20 06:02:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:49,923 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2019-11-20 06:02:49,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 06:02:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2019-11-20 06:02:49,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 06:02:49,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:49,924 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:50,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:50,127 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:50,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1706333793, now seen corresponding path program 1 times [2019-11-20 06:02:50,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:50,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1929037650] [2019-11-20 06:02:50,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:50,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 06:02:50,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:50,312 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:50,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1929037650] [2019-11-20 06:02:50,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:50,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 06:02:50,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597635665] [2019-11-20 06:02:50,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 06:02:50,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 06:02:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 06:02:50,346 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 6 states. [2019-11-20 06:02:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:50,435 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2019-11-20 06:02:50,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 06:02:50,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-20 06:02:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:50,439 INFO L225 Difference]: With dead ends: 84 [2019-11-20 06:02:50,439 INFO L226 Difference]: Without dead ends: 84 [2019-11-20 06:02:50,439 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 06:02:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-20 06:02:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2019-11-20 06:02:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-20 06:02:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2019-11-20 06:02:50,446 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 13 [2019-11-20 06:02:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:50,447 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2019-11-20 06:02:50,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 06:02:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2019-11-20 06:02:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 06:02:50,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:50,447 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:50,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:50,655 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1649075491, now seen corresponding path program 1 times [2019-11-20 06:02:50,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:50,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [717902852] [2019-11-20 06:02:50,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:50,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 06:02:50,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:50,837 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 06:02:50,838 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 06:02:50,838 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:50,843 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:50,843 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 06:02:50,843 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 06:02:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:50,852 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:50,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717902852] [2019-11-20 06:02:50,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:50,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 06:02:50,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372621284] [2019-11-20 06:02:50,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 06:02:50,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 06:02:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 06:02:50,864 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 3 states. [2019-11-20 06:02:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:50,960 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2019-11-20 06:02:50,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 06:02:50,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 06:02:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:50,961 INFO L225 Difference]: With dead ends: 73 [2019-11-20 06:02:50,961 INFO L226 Difference]: Without dead ends: 73 [2019-11-20 06:02:50,962 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 06:02:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-20 06:02:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-11-20 06:02:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-20 06:02:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2019-11-20 06:02:50,968 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 13 [2019-11-20 06:02:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:50,968 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2019-11-20 06:02:50,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 06:02:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2019-11-20 06:02:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 06:02:50,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:50,969 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:51,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:51,178 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:51,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:51,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1649075490, now seen corresponding path program 1 times [2019-11-20 06:02:51,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:51,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [685645811] [2019-11-20 06:02:51,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:51,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 06:02:51,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:51,350 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:51,350 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 06:02:51,351 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:51,406 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 06:02:51,406 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 06:02:51,407 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2019-11-20 06:02:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:51,437 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:51,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [685645811] [2019-11-20 06:02:51,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:51,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 06:02:51,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440616753] [2019-11-20 06:02:51,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 06:02:51,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:51,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 06:02:51,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 06:02:51,567 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 7 states. [2019-11-20 06:02:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:52,027 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2019-11-20 06:02:52,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 06:02:52,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-20 06:02:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:52,029 INFO L225 Difference]: With dead ends: 84 [2019-11-20 06:02:52,029 INFO L226 Difference]: Without dead ends: 84 [2019-11-20 06:02:52,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-20 06:02:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-20 06:02:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2019-11-20 06:02:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-20 06:02:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2019-11-20 06:02:52,036 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 13 [2019-11-20 06:02:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:52,036 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2019-11-20 06:02:52,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 06:02:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2019-11-20 06:02:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 06:02:52,037 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:52,037 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:52,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:52,239 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1356741643, now seen corresponding path program 1 times [2019-11-20 06:02:52,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:52,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [333692770] [2019-11-20 06:02:52,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:52,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 06:02:52,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:52,405 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:52,406 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 06:02:52,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:52,432 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-20 06:02:52,432 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 06:02:52,433 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:14 [2019-11-20 06:02:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:52,444 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:52,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333692770] [2019-11-20 06:02:52,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:52,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 06:02:52,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698183127] [2019-11-20 06:02:52,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 06:02:52,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:52,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 06:02:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 06:02:52,535 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand 6 states. [2019-11-20 06:02:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:52,826 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2019-11-20 06:02:52,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 06:02:52,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 06:02:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:52,828 INFO L225 Difference]: With dead ends: 81 [2019-11-20 06:02:52,828 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 06:02:52,828 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 06:02:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 06:02:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2019-11-20 06:02:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 06:02:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-11-20 06:02:52,834 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 14 [2019-11-20 06:02:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:52,834 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-11-20 06:02:52,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 06:02:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-11-20 06:02:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 06:02:52,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:52,835 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:53,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:53,038 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1619307385, now seen corresponding path program 1 times [2019-11-20 06:02:53,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:53,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [463189862] [2019-11-20 06:02:53,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:02:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:53,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 06:02:53,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:53,201 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_69|]} [2019-11-20 06:02:53,211 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 06:02:53,212 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 06:02:53,212 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:53,230 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:53,239 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 06:02:53,239 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:53,258 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:53,259 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 06:02:53,259 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-20 06:02:53,348 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 06:02:53,348 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:53,801 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 06:02:53,819 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 06:02:53,819 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:53,820 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:53,820 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 06:02:53,820 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 06:02:53,821 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2019-11-20 06:02:53,824 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 06:02:53,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463189862] [2019-11-20 06:02:53,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:02:53,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 06:02:53,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682030305] [2019-11-20 06:02:53,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 06:02:53,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:53,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 06:02:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 06:02:53,826 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 10 states. [2019-11-20 06:02:54,680 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 06:02:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:55,538 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2019-11-20 06:02:55,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 06:02:55,540 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-20 06:02:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:55,541 INFO L225 Difference]: With dead ends: 138 [2019-11-20 06:02:55,541 INFO L226 Difference]: Without dead ends: 138 [2019-11-20 06:02:55,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 06:02:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-20 06:02:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 90. [2019-11-20 06:02:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-20 06:02:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2019-11-20 06:02:55,547 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 15 [2019-11-20 06:02:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:55,548 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2019-11-20 06:02:55,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 06:02:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2019-11-20 06:02:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 06:02:55,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:55,549 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:55,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:55,751 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash 902580385, now seen corresponding path program 1 times [2019-11-20 06:02:55,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:55,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [902135496] [2019-11-20 06:02:55,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:02:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:55,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 06:02:55,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:55,949 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:55,949 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 06:02:55,949 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:55,983 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 06:02:55,983 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 06:02:55,983 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2019-11-20 06:02:56,096 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 06:02:56,096 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:56,747 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 06:02:56,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [902135496] [2019-11-20 06:02:56,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:02:56,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 06:02:56,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836684121] [2019-11-20 06:02:56,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 06:02:56,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:56,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 06:02:56,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-20 06:02:56,749 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand 12 states. [2019-11-20 06:02:57,512 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-11-20 06:02:57,753 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2019-11-20 06:02:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:58,182 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2019-11-20 06:02:58,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 06:02:58,184 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-20 06:02:58,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:58,185 INFO L225 Difference]: With dead ends: 107 [2019-11-20 06:02:58,185 INFO L226 Difference]: Without dead ends: 107 [2019-11-20 06:02:58,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-11-20 06:02:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-20 06:02:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2019-11-20 06:02:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-20 06:02:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2019-11-20 06:02:58,191 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 17 [2019-11-20 06:02:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:58,191 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2019-11-20 06:02:58,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 06:02:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2019-11-20 06:02:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 06:02:58,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:58,192 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:58,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:58,395 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1837641510, now seen corresponding path program 1 times [2019-11-20 06:02:58,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:58,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1914473918] [2019-11-20 06:02:58,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:02:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:58,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 06:02:58,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:58,562 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:58,579 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 06:02:58,580 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:02:58,581 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:58,581 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:02:58,582 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-20 06:02:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:58,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914473918] [2019-11-20 06:02:58,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:58,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-20 06:02:58,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81470860] [2019-11-20 06:02:58,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 06:02:58,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 06:02:58,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 06:02:58,587 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 5 states. [2019-11-20 06:02:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:02:58,720 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2019-11-20 06:02:58,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 06:02:58,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-20 06:02:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:02:58,722 INFO L225 Difference]: With dead ends: 84 [2019-11-20 06:02:58,722 INFO L226 Difference]: Without dead ends: 84 [2019-11-20 06:02:58,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 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 06:02:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-20 06:02:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-11-20 06:02:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-20 06:02:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2019-11-20 06:02:58,727 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 20 [2019-11-20 06:02:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:02:58,727 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2019-11-20 06:02:58,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 06:02:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2019-11-20 06:02:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 06:02:58,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:02:58,728 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:02:58,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:02:58,931 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:02:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:02:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1837641509, now seen corresponding path program 1 times [2019-11-20 06:02:58,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:02:58,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [137093470] [2019-11-20 06:02:58,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:02:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:02:59,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 06:02:59,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:02:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:59,190 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:02:59,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 06:02:59,392 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 06:02:59,393 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 06:02:59,408 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 06:02:59,409 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 06:02:59,417 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 16 treesize of output 12 [2019-11-20 06:02:59,418 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 06:02:59,455 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:02:59,456 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 06:02:59,456 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:35 [2019-11-20 06:02:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:02:59,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [137093470] [2019-11-20 06:02:59,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:02:59,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 06:02:59,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146554242] [2019-11-20 06:02:59,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 06:02:59,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:02:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 06:02:59,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-20 06:02:59,714 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 12 states. [2019-11-20 06:03:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:03:00,405 INFO L93 Difference]: Finished difference Result 126 states and 155 transitions. [2019-11-20 06:03:00,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 06:03:00,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-20 06:03:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:03:00,408 INFO L225 Difference]: With dead ends: 126 [2019-11-20 06:03:00,409 INFO L226 Difference]: Without dead ends: 126 [2019-11-20 06:03:00,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-20 06:03:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-20 06:03:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 91. [2019-11-20 06:03:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-20 06:03:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2019-11-20 06:03:00,414 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 20 [2019-11-20 06:03:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:03:00,415 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2019-11-20 06:03:00,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 06:03:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2019-11-20 06:03:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 06:03:00,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:03:00,416 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 06:03:00,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:00,618 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:03:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:03:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1131665794, now seen corresponding path program 1 times [2019-11-20 06:03:00,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:03:00,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [765499710] [2019-11-20 06:03:00,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:03:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:03:00,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 06:03:00,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:03:00,814 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 06:03:00,815 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:00,828 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:00,828 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:03:00,829 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 06:03:00,944 INFO L343 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2019-11-20 06:03:00,944 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 49 [2019-11-20 06:03:00,945 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:00,968 INFO L567 ElimStorePlain]: treesize reduction 4, result has 85.7 percent of original size [2019-11-20 06:03:00,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:00,970 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 06:03:00,970 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:24 [2019-11-20 06:03:00,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:00,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:00,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:01,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:01,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:03,090 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:03:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:07,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [765499710] [2019-11-20 06:03:07,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:03:07,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 9 [2019-11-20 06:03:07,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116243227] [2019-11-20 06:03:07,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 06:03:07,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:03:07,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 06:03:07,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=60, Unknown=3, NotChecked=0, Total=90 [2019-11-20 06:03:07,200 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 10 states. [2019-11-20 06:03:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:03:21,553 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2019-11-20 06:03:21,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 06:03:21,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-20 06:03:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:03:21,554 INFO L225 Difference]: With dead ends: 90 [2019-11-20 06:03:21,554 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 06:03:21,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=40, Invalid=89, Unknown=3, NotChecked=0, Total=132 [2019-11-20 06:03:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 06:03:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-20 06:03:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-20 06:03:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2019-11-20 06:03:21,558 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 21 [2019-11-20 06:03:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:03:21,558 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2019-11-20 06:03:21,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 06:03:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2019-11-20 06:03:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 06:03:21,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:03:21,559 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 06:03:21,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:21,762 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:03:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:03:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1132311905, now seen corresponding path program 1 times [2019-11-20 06:03:21,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:03:21,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [620013738] [2019-11-20 06:03:21,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:03:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:03:21,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 06:03:21,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:03:21,950 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 06:03:21,950 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 06:03:21,951 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:21,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:21,956 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 06:03:21,956 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 06:03:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:21,980 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:03:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:22,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [620013738] [2019-11-20 06:03:22,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:03:22,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 5 [2019-11-20 06:03:22,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300661568] [2019-11-20 06:03:22,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 06:03:22,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:03:22,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 06:03:22,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-20 06:03:22,021 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 6 states. [2019-11-20 06:03:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:03:22,122 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2019-11-20 06:03:22,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 06:03:22,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-20 06:03:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:03:22,124 INFO L225 Difference]: With dead ends: 81 [2019-11-20 06:03:22,124 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 06:03:22,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-20 06:03:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 06:03:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-20 06:03:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-20 06:03:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2019-11-20 06:03:22,127 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 21 [2019-11-20 06:03:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:03:22,128 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2019-11-20 06:03:22,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 06:03:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2019-11-20 06:03:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 06:03:22,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:03:22,129 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 06:03:22,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:22,329 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:03:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:03:22,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1132311904, now seen corresponding path program 1 times [2019-11-20 06:03:22,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:03:22,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1832283162] [2019-11-20 06:03:22,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:03:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:03:22,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 06:03:22,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:03:22,585 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:22,586 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 06:03:22,586 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:22,608 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-20 06:03:22,609 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 06:03:22,609 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-20 06:03:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:22,661 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:03:22,852 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 06:03:22,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1832283162] [2019-11-20 06:03:22,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:03:22,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 06:03:22,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580895152] [2019-11-20 06:03:22,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 06:03:22,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:03:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 06:03:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 06:03:22,854 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 10 states. [2019-11-20 06:03:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:03:23,531 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2019-11-20 06:03:23,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 06:03:23,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-20 06:03:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:03:23,534 INFO L225 Difference]: With dead ends: 131 [2019-11-20 06:03:23,534 INFO L226 Difference]: Without dead ends: 122 [2019-11-20 06:03:23,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-20 06:03:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-20 06:03:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 81. [2019-11-20 06:03:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-20 06:03:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2019-11-20 06:03:23,538 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 21 [2019-11-20 06:03:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:03:23,538 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2019-11-20 06:03:23,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 06:03:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2019-11-20 06:03:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 06:03:23,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:03:23,539 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:03:23,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:23,739 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:03:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:03:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash 288160127, now seen corresponding path program 2 times [2019-11-20 06:03:23,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:03:23,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1171806615] [2019-11-20 06:03:23,740 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:03:23,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 06:03:23,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 06:03:23,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 06:03:23,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:03:23,939 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_45|], 1=[|v_#valid_104|]} [2019-11-20 06:03:23,943 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 06:03:23,944 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 06:03:23,945 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:23,964 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:23,971 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 06:03:23,971 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:23,988 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:23,989 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 06:03:23,989 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-20 06:03:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:24,157 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:03:25,026 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 06:03:25,033 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 06:03:25,033 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:25,046 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:25,048 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 06:03:25,049 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:25,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:25,062 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 06:03:25,062 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:10 [2019-11-20 06:03:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:25,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171806615] [2019-11-20 06:03:25,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 06:03:25,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2019-11-20 06:03:25,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285149941] [2019-11-20 06:03:25,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 06:03:25,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:03:25,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 06:03:25,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-20 06:03:25,158 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 15 states. [2019-11-20 06:03:27,194 WARN L191 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-11-20 06:03:30,168 WARN L191 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-20 06:03:30,906 WARN L191 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-20 06:03:32,833 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-20 06:03:33,280 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-11-20 06:03:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:03:33,947 INFO L93 Difference]: Finished difference Result 191 states and 225 transitions. [2019-11-20 06:03:33,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 06:03:33,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-11-20 06:03:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:03:33,949 INFO L225 Difference]: With dead ends: 191 [2019-11-20 06:03:33,949 INFO L226 Difference]: Without dead ends: 191 [2019-11-20 06:03:33,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-11-20 06:03:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-20 06:03:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2019-11-20 06:03:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-20 06:03:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2019-11-20 06:03:33,953 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 23 [2019-11-20 06:03:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:03:33,953 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2019-11-20 06:03:33,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 06:03:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2019-11-20 06:03:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 06:03:33,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:03:33,954 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:03:34,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:34,154 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:03:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:03:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1141562646, now seen corresponding path program 1 times [2019-11-20 06:03:34,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:03:34,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1592534802] [2019-11-20 06:03:34,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:03:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:03:34,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 06:03:34,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:03:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:34,283 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:03:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:34,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592534802] [2019-11-20 06:03:34,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:03:34,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 06:03:34,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885929395] [2019-11-20 06:03:34,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 06:03:34,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:03:34,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 06:03:34,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 06:03:34,288 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand 3 states. [2019-11-20 06:03:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:03:34,301 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2019-11-20 06:03:34,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 06:03:34,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-20 06:03:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:03:34,303 INFO L225 Difference]: With dead ends: 119 [2019-11-20 06:03:34,303 INFO L226 Difference]: Without dead ends: 118 [2019-11-20 06:03:34,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 06:03:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-20 06:03:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-11-20 06:03:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-20 06:03:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2019-11-20 06:03:34,307 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 25 [2019-11-20 06:03:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:03:34,307 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2019-11-20 06:03:34,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 06:03:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2019-11-20 06:03:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 06:03:34,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:03:34,308 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:03:34,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:34,508 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:03:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:03:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash 119492482, now seen corresponding path program 1 times [2019-11-20 06:03:34,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:03:34,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [633278505] [2019-11-20 06:03:34,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/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 06:03:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:03:34,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 06:03:34,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:03:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:34,639 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:03:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:34,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [633278505] [2019-11-20 06:03:34,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 06:03:34,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 06:03:34,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694898971] [2019-11-20 06:03:34,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 06:03:34,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 06:03:34,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 06:03:34,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 06:03:34,649 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand 3 states. [2019-11-20 06:03:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 06:03:34,664 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2019-11-20 06:03:34,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 06:03:34,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-20 06:03:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 06:03:34,666 INFO L225 Difference]: With dead ends: 119 [2019-11-20 06:03:34,666 INFO L226 Difference]: Without dead ends: 118 [2019-11-20 06:03:34,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 06:03:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-20 06:03:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-11-20 06:03:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-20 06:03:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2019-11-20 06:03:34,670 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 28 [2019-11-20 06:03:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 06:03:34,670 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2019-11-20 06:03:34,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 06:03:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2019-11-20 06:03:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 06:03:34,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 06:03:34,671 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 06:03:34,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:34,872 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrncmpErr0REQUIRES_VIOLATION, cstrncmpErr5REQUIRES_VIOLATION, cstrncmpErr7REQUIRES_VIOLATION, cstrncmpErr6REQUIRES_VIOLATION, cstrncmpErr1REQUIRES_VIOLATION, cstrncmpErr8REQUIRES_VIOLATION, cstrncmpErr3REQUIRES_VIOLATION, cstrncmpErr2REQUIRES_VIOLATION, cstrncmpErr4REQUIRES_VIOLATION, cstrncmpErr9REQUIRES_VIOLATION]=== [2019-11-20 06:03:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 06:03:34,872 INFO L82 PathProgramCache]: Analyzing trace with hash 439928263, now seen corresponding path program 1 times [2019-11-20 06:03:34,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 06:03:34,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [520059479] [2019-11-20 06:03:34,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c36de9e3-cf69-4db1-a9f2-773443821fc9/bin/uautomizer/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 06:03:35,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 06:03:35,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 06:03:35,104 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 06:03:35,105 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 06:03:35,110 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:35,110 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 06:03:35,110 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-20 06:03:35,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:35,326 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:35,326 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 28 [2019-11-20 06:03:35,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 06:03:35,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 06:03:35,329 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 06:03:35,349 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 06:03:35,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 06:03:35,351 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-20 06:03:35,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2019-11-20 06:03:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 06:03:35,411 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 06:03:35,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:35,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 06:03:35,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 06:03:35,936 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 06:03:35,939 INFO L168 Benchmark]: Toolchain (without parser) took 51161.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 188.2 MB). Free memory was 940.7 MB in the beginning and 926.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 202.5 MB. Max. memory is 11.5 GB. [2019-11-20 06:03:35,939 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 06:03:35,940 INFO L168 Benchmark]: CACSL2BoogieTranslator took 547.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 06:03:35,940 INFO L168 Benchmark]: Boogie Preprocessor took 67.05 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 06:03:35,940 INFO L168 Benchmark]: RCFGBuilder took 913.13 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: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. [2019-11-20 06:03:35,941 INFO L168 Benchmark]: TraceAbstraction took 49630.18 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 53.0 MB). Free memory was 1.1 GB in the beginning and 926.4 MB in the end (delta: 131.5 MB). Peak memory consumption was 184.4 MB. Max. memory is 11.5 GB. [2019-11-20 06:03:35,942 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 547.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 67.05 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 913.13 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: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 49630.18 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 53.0 MB). Free memory was 1.1 GB in the beginning and 926.4 MB in the end (delta: 131.5 MB). Peak memory consumption was 184.4 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...