./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.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_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 cb6ff0b2d9abd29a15d3eb2d5a86a23b460e9725 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 05:27:21,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 05:27:21,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 05:27:21,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 05:27:21,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 05:27:21,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 05:27:21,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 05:27:21,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 05:27:21,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 05:27:21,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 05:27:21,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 05:27:21,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 05:27:21,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 05:27:21,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 05:27:21,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 05:27:21,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 05:27:21,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 05:27:21,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 05:27:21,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 05:27:21,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 05:27:21,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 05:27:21,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 05:27:21,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 05:27:21,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 05:27:21,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 05:27:21,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 05:27:21,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 05:27:21,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 05:27:21,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 05:27:21,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 05:27:21,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 05:27:21,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 05:27:21,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 05:27:21,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 05:27:21,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 05:27:21,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 05:27:21,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 05:27:21,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 05:27:21,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 05:27:21,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 05:27:21,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 05:27:21,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 05:27:21,732 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 05:27:21,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 05:27:21,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 05:27:21,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 05:27:21,733 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 05:27:21,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 05:27:21,734 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 05:27:21,734 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 05:27:21,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 05:27:21,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 05:27:21,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 05:27:21,735 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 05:27:21,735 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 05:27:21,735 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 05:27:21,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 05:27:21,736 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 05:27:21,736 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 05:27:21,736 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 05:27:21,736 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 05:27:21,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 05:27:21,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 05:27:21,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 05:27:21,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 05:27:21,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 05:27:21,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 05:27:21,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 05:27:21,738 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 05:27:21,738 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 05:27:21,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 05:27:21,738 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_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 -> cb6ff0b2d9abd29a15d3eb2d5a86a23b460e9725 [2019-11-20 05:27:21,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 05:27:21,897 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 05:27:21,900 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 05:27:21,902 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 05:27:21,902 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 05:27:21,903 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2019-11-20 05:27:21,959 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/data/ccf999042/599318fa7fd247e08a8bbb8d50081a77/FLAGe0699578d [2019-11-20 05:27:22,413 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 05:27:22,414 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2019-11-20 05:27:22,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/data/ccf999042/599318fa7fd247e08a8bbb8d50081a77/FLAGe0699578d [2019-11-20 05:27:22,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/data/ccf999042/599318fa7fd247e08a8bbb8d50081a77 [2019-11-20 05:27:22,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 05:27:22,703 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 05:27:22,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 05:27:22,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 05:27:22,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 05:27:22,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:27:22" (1/1) ... [2019-11-20 05:27:22,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629c9d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:22, skipping insertion in model container [2019-11-20 05:27:22,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:27:22" (1/1) ... [2019-11-20 05:27:22,721 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 05:27:22,779 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 05:27:23,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:27:23,184 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 05:27:23,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:27:23,328 INFO L192 MainTranslator]: Completed translation [2019-11-20 05:27:23,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23 WrapperNode [2019-11-20 05:27:23,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 05:27:23,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 05:27:23,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 05:27:23,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 05:27:23,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (1/1) ... [2019-11-20 05:27:23,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (1/1) ... [2019-11-20 05:27:23,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (1/1) ... [2019-11-20 05:27:23,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (1/1) ... [2019-11-20 05:27:23,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (1/1) ... [2019-11-20 05:27:23,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (1/1) ... [2019-11-20 05:27:23,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (1/1) ... [2019-11-20 05:27:23,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 05:27:23,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 05:27:23,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 05:27:23,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 05:27:23,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:23,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 05:27:23,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 05:27:23,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 05:27:23,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 05:27:23,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 05:27:23,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 05:27:23,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 05:27:23,465 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcat [2019-11-20 05:27:23,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 05:27:23,465 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 05:27:23,465 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 05:27:23,465 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 05:27:23,465 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 05:27:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 05:27:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 05:27:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 05:27:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 05:27:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 05:27:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 05:27:23,466 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 05:27:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 05:27:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 05:27:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 05:27:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 05:27:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 05:27:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 05:27:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 05:27:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 05:27:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 05:27:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 05:27:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 05:27:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 05:27:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 05:27:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 05:27:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 05:27:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 05:27:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 05:27:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 05:27:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 05:27:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 05:27:23,469 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 05:27:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 05:27:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 05:27:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 05:27:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 05:27:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 05:27:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 05:27:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 05:27:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 05:27:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 05:27:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 05:27:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 05:27:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 05:27:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 05:27:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 05:27:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 05:27:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 05:27:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 05:27:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 05:27:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 05:27:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 05:27:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 05:27:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 05:27:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 05:27:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 05:27:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 05:27:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 05:27:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 05:27:23,473 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 05:27:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 05:27:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 05:27:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 05:27:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 05:27:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 05:27:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 05:27:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 05:27:23,474 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 05:27:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 05:27:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 05:27:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 05:27:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 05:27:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 05:27:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 05:27:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 05:27:23,475 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 05:27:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 05:27:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 05:27:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 05:27:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 05:27:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 05:27:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 05:27:23,476 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 05:27:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 05:27:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 05:27:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 05:27:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 05:27:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 05:27:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 05:27:23,477 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 05:27:23,478 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-20 05:27:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcat [2019-11-20 05:27:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 05:27:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 05:27:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 05:27:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 05:27:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 05:27:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 05:27:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 05:27:24,139 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 05:27:24,139 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 05:27:24,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:27:24 BoogieIcfgContainer [2019-11-20 05:27:24,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 05:27:24,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 05:27:24,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 05:27:24,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 05:27:24,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:27:22" (1/3) ... [2019-11-20 05:27:24,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbab7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:27:24, skipping insertion in model container [2019-11-20 05:27:24,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:27:23" (2/3) ... [2019-11-20 05:27:24,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbab7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:27:24, skipping insertion in model container [2019-11-20 05:27:24,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:27:24" (3/3) ... [2019-11-20 05:27:24,151 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2019-11-20 05:27:24,162 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 05:27:24,172 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2019-11-20 05:27:24,183 INFO L249 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2019-11-20 05:27:24,204 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 05:27:24,213 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 05:27:24,213 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 05:27:24,213 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 05:27:24,213 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 05:27:24,213 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 05:27:24,213 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 05:27:24,214 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 05:27:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-11-20 05:27:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 05:27:24,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:24,246 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:24,247 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:24,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1531290546, now seen corresponding path program 1 times [2019-11-20 05:27:24,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:24,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1309024759] [2019-11-20 05:27:24,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:24,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 05:27:24,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:24,497 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 05:27:24,497 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:24,508 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 05:27:24,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1309024759] [2019-11-20 05:27:24,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:24,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 05:27:24,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317423748] [2019-11-20 05:27:24,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 05:27:24,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:24,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 05:27:24,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:27:24,532 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2019-11-20 05:27:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:24,664 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2019-11-20 05:27:24,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:27:24,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-20 05:27:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:24,681 INFO L225 Difference]: With dead ends: 54 [2019-11-20 05:27:24,689 INFO L226 Difference]: Without dead ends: 50 [2019-11-20 05:27:24,691 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 05:27:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-20 05:27:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-20 05:27:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 05:27:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2019-11-20 05:27:24,745 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 11 [2019-11-20 05:27:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:24,745 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2019-11-20 05:27:24,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 05:27:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2019-11-20 05:27:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 05:27:24,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:24,747 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:24,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:24,949 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:24,950 INFO L82 PathProgramCache]: Analyzing trace with hash 225366524, now seen corresponding path program 1 times [2019-11-20 05:27:24,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:24,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [662701135] [2019-11-20 05:27:24,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:25,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 05:27:25,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:25,161 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 05:27:25,161 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:25,198 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 05:27:25,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662701135] [2019-11-20 05:27:25,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:25,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 05:27:25,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480592656] [2019-11-20 05:27:25,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:27:25,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:25,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:27:25,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:27:25,205 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2019-11-20 05:27:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:25,301 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2019-11-20 05:27:25,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:27:25,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-20 05:27:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:25,305 INFO L225 Difference]: With dead ends: 71 [2019-11-20 05:27:25,305 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 05:27:25,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 05:27:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 05:27:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2019-11-20 05:27:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 05:27:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2019-11-20 05:27:25,317 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 12 [2019-11-20 05:27:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:25,318 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2019-11-20 05:27:25,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:27:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2019-11-20 05:27:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 05:27:25,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:25,318 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:25,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:25,522 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash 282624826, now seen corresponding path program 1 times [2019-11-20 05:27:25,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:25,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [358665706] [2019-11-20 05:27:25,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:25,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 05:27:25,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:25,809 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 05:27:25,809 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:26,002 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 05:27:26,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [358665706] [2019-11-20 05:27:26,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:26,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-11-20 05:27:26,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121117355] [2019-11-20 05:27:26,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:27:26,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:26,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:27:26,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:27:26,005 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 10 states. [2019-11-20 05:27:26,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:26,639 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2019-11-20 05:27:26,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 05:27:26,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-11-20 05:27:26,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:26,642 INFO L225 Difference]: With dead ends: 115 [2019-11-20 05:27:26,642 INFO L226 Difference]: Without dead ends: 115 [2019-11-20 05:27:26,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:27:26,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-20 05:27:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 54. [2019-11-20 05:27:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 05:27:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2019-11-20 05:27:26,652 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 12 [2019-11-20 05:27:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:26,652 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2019-11-20 05:27:26,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:27:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2019-11-20 05:27:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 05:27:26,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:26,653 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:26,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:26,856 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:26,856 INFO L82 PathProgramCache]: Analyzing trace with hash 284471868, now seen corresponding path program 1 times [2019-11-20 05:27:26,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:26,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [233721309] [2019-11-20 05:27:26,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:27,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 05:27:27,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:27,090 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 05:27:27,091 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 05:27:27,091 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:27,096 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:27,097 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 05:27:27,097 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 05:27:27,124 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 05:27:27,125 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:27,135 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 05:27:27,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [233721309] [2019-11-20 05:27:27,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:27,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 05:27:27,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146228992] [2019-11-20 05:27:27,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 05:27:27,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:27,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 05:27:27,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:27:27,137 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 3 states. [2019-11-20 05:27:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:27,215 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-11-20 05:27:27,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:27:27,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 05:27:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:27,216 INFO L225 Difference]: With dead ends: 52 [2019-11-20 05:27:27,216 INFO L226 Difference]: Without dead ends: 52 [2019-11-20 05:27:27,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:27:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-20 05:27:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-20 05:27:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-20 05:27:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2019-11-20 05:27:27,225 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 12 [2019-11-20 05:27:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:27,225 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2019-11-20 05:27:27,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 05:27:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2019-11-20 05:27:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 05:27:27,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:27,226 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:27,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:27,429 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash 284471869, now seen corresponding path program 1 times [2019-11-20 05:27:27,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:27,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [180690544] [2019-11-20 05:27:27,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:27,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:27:27,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:27,618 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_23|], 1=[|v_#valid_45|]} [2019-11-20 05:27:27,625 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:27:27,627 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 05:27:27,627 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:27,658 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:27,670 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 05:27:27,670 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:27,695 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:27,696 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 05:27:27,696 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2019-11-20 05:27:27,719 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 05:27:27,719 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:27,825 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 05:27:27,832 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 05:27:27,833 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:27,843 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:27,845 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:27:27,845 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:27,855 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:27,856 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 05:27:27,856 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2019-11-20 05:27:27,864 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 05:27:27,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [180690544] [2019-11-20 05:27:27,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:27,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 05:27:27,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98769995] [2019-11-20 05:27:27,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 05:27:27,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:27,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 05:27:27,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 05:27:27,866 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 5 states. [2019-11-20 05:27:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:28,292 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2019-11-20 05:27:28,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:27:28,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-20 05:27:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:28,297 INFO L225 Difference]: With dead ends: 72 [2019-11-20 05:27:28,297 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 05:27:28,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 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 05:27:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 05:27:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2019-11-20 05:27:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 05:27:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-11-20 05:27:28,303 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 12 [2019-11-20 05:27:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:28,303 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-11-20 05:27:28,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 05:27:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-11-20 05:27:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 05:27:28,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:28,310 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:28,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:28,514 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:28,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:28,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1828814612, now seen corresponding path program 1 times [2019-11-20 05:27:28,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:28,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [932638248] [2019-11-20 05:27:28,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:28,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 05:27:28,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:28,704 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_50|]} [2019-11-20 05:27:28,708 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:27:28,710 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 05:27:28,711 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:28,722 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:28,728 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 05:27:28,729 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:28,740 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:28,740 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 05:27:28,741 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:14 [2019-11-20 05:27:28,758 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 05:27:28,758 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:28,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:27:28,834 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 05:27:28,846 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:27:28,847 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:28,854 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:28,854 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 05:27:28,854 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 05:27:28,854 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:11 [2019-11-20 05:27:28,895 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 05:27:28,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [932638248] [2019-11-20 05:27:28,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:28,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 05:27:28,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901472743] [2019-11-20 05:27:28,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:27:28,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:28,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:27:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:27:28,897 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 6 states. [2019-11-20 05:27:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:29,266 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-20 05:27:29,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 05:27:29,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 05:27:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:29,268 INFO L225 Difference]: With dead ends: 71 [2019-11-20 05:27:29,269 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 05:27:29,269 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 05:27:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 05:27:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2019-11-20 05:27:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 05:27:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-11-20 05:27:29,274 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 14 [2019-11-20 05:27:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:29,275 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-11-20 05:27:29,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:27:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-11-20 05:27:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 05:27:29,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:29,275 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:29,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:29,476 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:29,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1828814664, now seen corresponding path program 1 times [2019-11-20 05:27:29,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:29,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [901393144] [2019-11-20 05:27:29,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:29,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 05:27:29,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:29,623 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 05:27:29,623 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:29,645 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 05:27:29,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901393144] [2019-11-20 05:27:29,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:29,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 05:27:29,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883526784] [2019-11-20 05:27:29,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:27:29,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:27:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:27:29,646 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 6 states. [2019-11-20 05:27:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:29,713 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2019-11-20 05:27:29,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:27:29,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 05:27:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:29,715 INFO L225 Difference]: With dead ends: 73 [2019-11-20 05:27:29,715 INFO L226 Difference]: Without dead ends: 73 [2019-11-20 05:27:29,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 05:27:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-20 05:27:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-11-20 05:27:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-20 05:27:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-11-20 05:27:29,722 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 14 [2019-11-20 05:27:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:29,723 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-11-20 05:27:29,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:27:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-11-20 05:27:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 05:27:29,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:29,724 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:29,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:29,927 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:29,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1886072966, now seen corresponding path program 1 times [2019-11-20 05:27:29,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:29,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [762691763] [2019-11-20 05:27:29,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:30,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 05:27:30,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:30,076 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 05:27:30,076 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 05:27:30,077 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:30,081 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:30,082 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 05:27:30,082 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 05:27:30,090 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 05:27:30,090 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:30,098 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 05:27:30,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [762691763] [2019-11-20 05:27:30,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:30,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 05:27:30,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583980711] [2019-11-20 05:27:30,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 05:27:30,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 05:27:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:27:30,099 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 3 states. [2019-11-20 05:27:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:30,149 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-11-20 05:27:30,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:27:30,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-20 05:27:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:30,150 INFO L225 Difference]: With dead ends: 62 [2019-11-20 05:27:30,150 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 05:27:30,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 05:27:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 05:27:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-20 05:27:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 05:27:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2019-11-20 05:27:30,155 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 14 [2019-11-20 05:27:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:30,155 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2019-11-20 05:27:30,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 05:27:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2019-11-20 05:27:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 05:27:30,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:30,156 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:30,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:30,359 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1886072967, now seen corresponding path program 1 times [2019-11-20 05:27:30,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:30,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1728879020] [2019-11-20 05:27:30,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:30,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 05:27:30,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:30,531 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:30,532 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 05:27:30,532 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:30,553 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-20 05:27:30,554 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 05:27:30,554 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-20 05:27:30,576 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 05:27:30,576 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:30,697 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 05:27:30,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1728879020] [2019-11-20 05:27:30,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:30,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 05:27:30,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592760784] [2019-11-20 05:27:30,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 05:27:30,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:30,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 05:27:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:27:30,699 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 8 states. [2019-11-20 05:27:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:31,369 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2019-11-20 05:27:31,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 05:27:31,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-20 05:27:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:31,371 INFO L225 Difference]: With dead ends: 111 [2019-11-20 05:27:31,371 INFO L226 Difference]: Without dead ends: 111 [2019-11-20 05:27:31,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-11-20 05:27:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-20 05:27:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2019-11-20 05:27:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-20 05:27:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2019-11-20 05:27:31,378 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 14 [2019-11-20 05:27:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:31,379 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2019-11-20 05:27:31,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 05:27:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2019-11-20 05:27:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 05:27:31,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:31,380 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:31,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:31,581 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 858678133, now seen corresponding path program 1 times [2019-11-20 05:27:31,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:31,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [255899017] [2019-11-20 05:27:31,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:31,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 05:27:31,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:31,790 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:31,790 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 05:27:31,790 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:31,831 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-20 05:27:31,832 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 05:27:31,832 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:14 [2019-11-20 05:27:31,843 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 05:27:31,844 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:31,958 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 05:27:31,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [255899017] [2019-11-20 05:27:31,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:31,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 05:27:31,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532700524] [2019-11-20 05:27:31,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 05:27:31,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:31,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 05:27:31,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:27:31,959 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 8 states. [2019-11-20 05:27:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:32,478 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2019-11-20 05:27:32,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:27:32,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-20 05:27:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:32,479 INFO L225 Difference]: With dead ends: 103 [2019-11-20 05:27:32,479 INFO L226 Difference]: Without dead ends: 103 [2019-11-20 05:27:32,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:27:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-20 05:27:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2019-11-20 05:27:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 05:27:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-11-20 05:27:32,485 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 15 [2019-11-20 05:27:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:32,485 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-11-20 05:27:32,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 05:27:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-11-20 05:27:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 05:27:32,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:32,487 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:32,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:32,689 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:32,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1661281801, now seen corresponding path program 1 times [2019-11-20 05:27:32,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:32,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1580162215] [2019-11-20 05:27:32,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:32,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:27:32,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:32,888 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:32,888 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 05:27:32,889 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:32,926 INFO L567 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2019-11-20 05:27:32,927 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 05:27:32,927 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:17 [2019-11-20 05:27:32,944 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 05:27:32,944 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:33,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:27:33,095 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 05:27:33,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1580162215] [2019-11-20 05:27:33,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:33,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2019-11-20 05:27:33,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688336239] [2019-11-20 05:27:33,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 05:27:33,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 05:27:33,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 05:27:33,096 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 7 states. [2019-11-20 05:27:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:33,456 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2019-11-20 05:27:33,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:27:33,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-20 05:27:33,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:33,458 INFO L225 Difference]: With dead ends: 92 [2019-11-20 05:27:33,458 INFO L226 Difference]: Without dead ends: 92 [2019-11-20 05:27:33,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:27:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-20 05:27:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2019-11-20 05:27:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-20 05:27:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2019-11-20 05:27:33,463 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 15 [2019-11-20 05:27:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:33,463 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2019-11-20 05:27:33,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 05:27:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2019-11-20 05:27:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 05:27:33,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:33,465 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:33,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:33,665 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1184816704, now seen corresponding path program 1 times [2019-11-20 05:27:33,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:33,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1599121534] [2019-11-20 05:27:33,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:33,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 05:27:33,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:33,844 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_35|], 1=[|v_#valid_76|]} [2019-11-20 05:27:33,849 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:27:33,850 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 05:27:33,850 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:33,867 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:33,874 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 05:27:33,875 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:33,891 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:33,892 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 05:27:33,892 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-20 05:27:34,047 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 05:27:34,047 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:34,489 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 05:27:34,493 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:27:34,494 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:34,495 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:34,495 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 05:27:34,495 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 05:27:34,495 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2019-11-20 05:27:34,499 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 05:27:34,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599121534] [2019-11-20 05:27:34,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:27:34,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 05:27:34,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722858770] [2019-11-20 05:27:34,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:27:34,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:34,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:27:34,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:27:34,500 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 10 states. [2019-11-20 05:27:35,458 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 05:27:35,928 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-20 05:27:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:36,125 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2019-11-20 05:27:36,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:27:36,127 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 05:27:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:36,128 INFO L225 Difference]: With dead ends: 135 [2019-11-20 05:27:36,129 INFO L226 Difference]: Without dead ends: 135 [2019-11-20 05:27:36,129 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:27:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-20 05:27:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2019-11-20 05:27:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-20 05:27:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2019-11-20 05:27:36,135 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 16 [2019-11-20 05:27:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:36,135 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2019-11-20 05:27:36,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:27:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2019-11-20 05:27:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 05:27:36,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:36,137 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:36,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:36,340 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:36,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:36,340 INFO L82 PathProgramCache]: Analyzing trace with hash 55103530, now seen corresponding path program 1 times [2019-11-20 05:27:36,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:36,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1678970967] [2019-11-20 05:27:36,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:36,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 05:27:36,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:36,508 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 05:27:36,508 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 05:27:36,508 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:36,513 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:36,513 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 05:27:36,513 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 05:27:36,539 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 05:27:36,539 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:36,576 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 05:27:36,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678970967] [2019-11-20 05:27:36,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:36,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 5 [2019-11-20 05:27:36,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174092257] [2019-11-20 05:27:36,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:27:36,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:36,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:27:36,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:27:36,578 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 6 states. [2019-11-20 05:27:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:36,714 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2019-11-20 05:27:36,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:27:36,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-20 05:27:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:36,715 INFO L225 Difference]: With dead ends: 86 [2019-11-20 05:27:36,715 INFO L226 Difference]: Without dead ends: 86 [2019-11-20 05:27:36,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 4 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 05:27:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-20 05:27:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-20 05:27:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-20 05:27:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2019-11-20 05:27:36,720 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 18 [2019-11-20 05:27:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:36,721 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2019-11-20 05:27:36,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:27:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2019-11-20 05:27:36,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 05:27:36,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:36,722 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:36,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:36,925 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:36,925 INFO L82 PathProgramCache]: Analyzing trace with hash 55103531, now seen corresponding path program 1 times [2019-11-20 05:27:36,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:36,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1628066770] [2019-11-20 05:27:36,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:37,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 05:27:37,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:37,126 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:37,127 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 05:27:37,127 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:37,153 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-20 05:27:37,153 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 05:27:37,154 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-20 05:27:37,203 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 05:27:37,203 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:37,395 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 05:27:37,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628066770] [2019-11-20 05:27:37,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:37,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 05:27:37,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239618793] [2019-11-20 05:27:37,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:27:37,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:27:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:27:37,397 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 10 states. [2019-11-20 05:27:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:38,010 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2019-11-20 05:27:38,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 05:27:38,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-20 05:27:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:38,013 INFO L225 Difference]: With dead ends: 137 [2019-11-20 05:27:38,013 INFO L226 Difference]: Without dead ends: 137 [2019-11-20 05:27:38,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 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 05:27:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-20 05:27:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2019-11-20 05:27:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-20 05:27:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2019-11-20 05:27:38,018 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 18 [2019-11-20 05:27:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:38,018 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2019-11-20 05:27:38,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:27:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2019-11-20 05:27:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 05:27:38,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:38,020 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:38,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:38,220 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash 411763084, now seen corresponding path program 1 times [2019-11-20 05:27:38,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:38,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [689125074] [2019-11-20 05:27:38,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:38,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 05:27:38,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:38,414 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:38,414 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 05:27:38,415 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:38,470 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 05:27:38,471 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 05:27:38,471 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2019-11-20 05:27:38,536 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 05:27:38,536 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:38,933 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 05:27:38,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [689125074] [2019-11-20 05:27:38,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:27:38,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2019-11-20 05:27:38,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513965392] [2019-11-20 05:27:38,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 05:27:38,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 05:27:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:27:38,935 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand 11 states. [2019-11-20 05:27:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:39,598 INFO L93 Difference]: Finished difference Result 141 states and 174 transitions. [2019-11-20 05:27:39,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:27:39,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-11-20 05:27:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:39,600 INFO L225 Difference]: With dead ends: 141 [2019-11-20 05:27:39,600 INFO L226 Difference]: Without dead ends: 141 [2019-11-20 05:27:39,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:27:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-20 05:27:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2019-11-20 05:27:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-20 05:27:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2019-11-20 05:27:39,606 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 18 [2019-11-20 05:27:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:39,606 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2019-11-20 05:27:39,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 05:27:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2019-11-20 05:27:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 05:27:39,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:39,608 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 05:27:39,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:39,808 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash 911814098, now seen corresponding path program 1 times [2019-11-20 05:27:39,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:39,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1824317733] [2019-11-20 05:27:39,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:39,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 05:27:39,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:40,007 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 05:27:40,007 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:40,032 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-20 05:27:40,033 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:40,034 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:40,034 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:27:40,034 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-20 05:27:40,039 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 05:27:40,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824317733] [2019-11-20 05:27:40,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:40,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 05:27:40,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013367239] [2019-11-20 05:27:40,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:27:40,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:40,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:27:40,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:27:40,040 INFO L87 Difference]: Start difference. First operand 119 states and 150 transitions. Second operand 6 states. [2019-11-20 05:27:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:40,231 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2019-11-20 05:27:40,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 05:27:40,232 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-20 05:27:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:40,233 INFO L225 Difference]: With dead ends: 118 [2019-11-20 05:27:40,233 INFO L226 Difference]: Without dead ends: 118 [2019-11-20 05:27:40,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:27:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-20 05:27:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-11-20 05:27:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-20 05:27:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 148 transitions. [2019-11-20 05:27:40,239 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 148 transitions. Word has length 21 [2019-11-20 05:27:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:40,239 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 148 transitions. [2019-11-20 05:27:40,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:27:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 148 transitions. [2019-11-20 05:27:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 05:27:40,247 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:40,247 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 05:27:40,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:40,451 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash 911814099, now seen corresponding path program 1 times [2019-11-20 05:27:40,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:40,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [839324371] [2019-11-20 05:27:40,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:40,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 05:27:40,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:40,750 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 05:27:40,750 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:40,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:27:41,002 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 05:27:41,003 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 05:27:41,017 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 05:27:41,018 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 05:27:41,033 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 14 treesize of output 12 [2019-11-20 05:27:41,034 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 05:27:41,078 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:41,078 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 05:27:41,079 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:35 [2019-11-20 05:27:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:27:41,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [839324371] [2019-11-20 05:27:41,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:41,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-20 05:27:41,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836060867] [2019-11-20 05:27:41,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 05:27:41,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 05:27:41,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:27:41,305 INFO L87 Difference]: Start difference. First operand 118 states and 148 transitions. Second operand 14 states. [2019-11-20 05:27:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:42,157 INFO L93 Difference]: Finished difference Result 169 states and 212 transitions. [2019-11-20 05:27:42,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:27:42,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-20 05:27:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:42,160 INFO L225 Difference]: With dead ends: 169 [2019-11-20 05:27:42,160 INFO L226 Difference]: Without dead ends: 169 [2019-11-20 05:27:42,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2019-11-20 05:27:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-20 05:27:42,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 122. [2019-11-20 05:27:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-20 05:27:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 152 transitions. [2019-11-20 05:27:42,165 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 152 transitions. Word has length 21 [2019-11-20 05:27:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:42,166 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 152 transitions. [2019-11-20 05:27:42,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 05:27:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 152 transitions. [2019-11-20 05:27:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 05:27:42,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:42,167 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 05:27:42,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:42,367 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash -99301463, now seen corresponding path program 1 times [2019-11-20 05:27:42,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:42,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1211915589] [2019-11-20 05:27:42,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:42,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 05:27:42,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:42,559 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 05:27:42,559 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:42,563 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:42,563 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:27:42,564 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-20 05:27:42,603 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2019-11-20 05:27:42,604 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:42,605 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:42,605 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:27:42,605 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-20 05:27:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:27:42,616 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:42,672 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2019-11-20 05:27:42,674 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2019-11-20 05:27:42,675 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:42,677 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:42,677 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:27:42,679 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:42,679 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:27:42,679 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:6 [2019-11-20 05:27:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:27:42,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1211915589] [2019-11-20 05:27:42,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:42,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2019-11-20 05:27:42,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956889952] [2019-11-20 05:27:42,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 05:27:42,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 05:27:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:27:42,684 INFO L87 Difference]: Start difference. First operand 122 states and 152 transitions. Second operand 11 states. [2019-11-20 05:27:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:42,883 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2019-11-20 05:27:42,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:27:42,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-20 05:27:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:42,885 INFO L225 Difference]: With dead ends: 146 [2019-11-20 05:27:42,885 INFO L226 Difference]: Without dead ends: 146 [2019-11-20 05:27:42,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:27:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-20 05:27:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2019-11-20 05:27:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-20 05:27:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2019-11-20 05:27:42,890 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 21 [2019-11-20 05:27:42,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:42,890 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2019-11-20 05:27:42,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 05:27:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2019-11-20 05:27:42,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 05:27:42,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:42,891 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 05:27:43,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:43,094 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:43,094 INFO L82 PathProgramCache]: Analyzing trace with hash -686107477, now seen corresponding path program 1 times [2019-11-20 05:27:43,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:43,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [563238953] [2019-11-20 05:27:43,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/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 05:27:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:43,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 05:27:43,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:43,293 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:43,294 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 05:27:43,294 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:43,324 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 05:27:43,325 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 05:27:43,325 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2019-11-20 05:27:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:27:43,396 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:27:43,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [563238953] [2019-11-20 05:27:43,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:27:43,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 05:27:43,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201035954] [2019-11-20 05:27:43,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 05:27:43,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 05:27:43,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:27:43,605 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 11 states. [2019-11-20 05:27:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:44,124 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2019-11-20 05:27:44,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:27:44,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-20 05:27:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:44,126 INFO L225 Difference]: With dead ends: 161 [2019-11-20 05:27:44,127 INFO L226 Difference]: Without dead ends: 161 [2019-11-20 05:27:44,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:27:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-20 05:27:44,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2019-11-20 05:27:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 05:27:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2019-11-20 05:27:44,132 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 21 [2019-11-20 05:27:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:44,132 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2019-11-20 05:27:44,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 05:27:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2019-11-20 05:27:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 05:27:44,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:44,133 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:44,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:44,336 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:44,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:44,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1798533960, now seen corresponding path program 1 times [2019-11-20 05:27:44,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:44,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1132126016] [2019-11-20 05:27:44,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:44,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 05:27:44,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:44,527 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 05:27:44,527 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 05:27:44,527 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:44,531 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:44,532 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 05:27:44,532 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 05:27:44,564 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 05:27:44,564 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:44,597 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 05:27:44,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1132126016] [2019-11-20 05:27:44,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:44,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 6 [2019-11-20 05:27:44,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607897047] [2019-11-20 05:27:44,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 05:27:44,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:44,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 05:27:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-20 05:27:44,598 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 7 states. [2019-11-20 05:27:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:44,777 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2019-11-20 05:27:44,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 05:27:44,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-20 05:27:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:44,778 INFO L225 Difference]: With dead ends: 92 [2019-11-20 05:27:44,778 INFO L226 Difference]: Without dead ends: 92 [2019-11-20 05:27:44,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:27:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-20 05:27:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-11-20 05:27:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-20 05:27:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2019-11-20 05:27:44,782 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 22 [2019-11-20 05:27:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:44,782 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2019-11-20 05:27:44,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 05:27:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2019-11-20 05:27:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 05:27:44,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:44,783 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:44,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:44,983 INFO L410 AbstractCegarLoop]: === Iteration 21 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1798533959, now seen corresponding path program 1 times [2019-11-20 05:27:44,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:44,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [366856796] [2019-11-20 05:27:44,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:45,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 05:27:45,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:45,190 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:45,190 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 05:27:45,190 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:45,215 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-20 05:27:45,215 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 05:27:45,215 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-20 05:27:45,252 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 05:27:45,253 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:45,471 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 05:27:45,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366856796] [2019-11-20 05:27:45,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:27:45,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 05:27:45,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792140115] [2019-11-20 05:27:45,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 05:27:45,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:45,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 05:27:45,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:27:45,472 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand 12 states. [2019-11-20 05:27:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:46,390 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2019-11-20 05:27:46,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 05:27:46,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-20 05:27:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:46,392 INFO L225 Difference]: With dead ends: 155 [2019-11-20 05:27:46,392 INFO L226 Difference]: Without dead ends: 155 [2019-11-20 05:27:46,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-11-20 05:27:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-11-20 05:27:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2019-11-20 05:27:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-20 05:27:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 178 transitions. [2019-11-20 05:27:46,398 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 178 transitions. Word has length 22 [2019-11-20 05:27:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:46,398 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 178 transitions. [2019-11-20 05:27:46,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 05:27:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 178 transitions. [2019-11-20 05:27:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 05:27:46,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:46,399 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:46,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:46,602 INFO L410 AbstractCegarLoop]: === Iteration 22 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:46,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1025543693, now seen corresponding path program 1 times [2019-11-20 05:27:46,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:46,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [786863220] [2019-11-20 05:27:46,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:27:46,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 05:27:46,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:27:46,856 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:27:47,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [786863220] [2019-11-20 05:27:47,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:27:47,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-11-20 05:27:47,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757122044] [2019-11-20 05:27:47,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:27:47,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:27:47,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:27:47,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:27:47,190 INFO L87 Difference]: Start difference. First operand 144 states and 178 transitions. Second operand 10 states. [2019-11-20 05:27:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:27:48,264 INFO L93 Difference]: Finished difference Result 156 states and 185 transitions. [2019-11-20 05:27:48,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 05:27:48,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-20 05:27:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:27:48,267 INFO L225 Difference]: With dead ends: 156 [2019-11-20 05:27:48,268 INFO L226 Difference]: Without dead ends: 156 [2019-11-20 05:27:48,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2019-11-20 05:27:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-20 05:27:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2019-11-20 05:27:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-20 05:27:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2019-11-20 05:27:48,273 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 22 [2019-11-20 05:27:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:27:48,273 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2019-11-20 05:27:48,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:27:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2019-11-20 05:27:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 05:27:48,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:27:48,274 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:27:48,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:48,475 INFO L410 AbstractCegarLoop]: === Iteration 23 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:27:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:27:48,475 INFO L82 PathProgramCache]: Analyzing trace with hash -254319985, now seen corresponding path program 2 times [2019-11-20 05:27:48,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:27:48,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1825943653] [2019-11-20 05:27:48,475 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/cvc4 Starting monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:27:48,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:27:48,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:27:48,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 05:27:48,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:27:48,731 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:27:48,743 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:27:48,743 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 05:27:48,744 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:27:48,811 INFO L567 ElimStorePlain]: treesize reduction 14, result has 70.2 percent of original size [2019-11-20 05:27:48,812 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 05:27:48,812 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:23 [2019-11-20 05:27:49,242 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-11-20 05:27:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 05:27:49,245 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:27:50,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:27:57,024 WARN L191 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-11-20 05:28:11,749 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2019-11-20 05:28:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 05:28:11,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1825943653] [2019-11-20 05:28:11,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:28:11,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2019-11-20 05:28:11,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851290172] [2019-11-20 05:28:11,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 05:28:11,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:28:11,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 05:28:11,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2019-11-20 05:28:11,880 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand 14 states. [2019-11-20 05:28:30,003 WARN L191 SmtUtils]: Spent 15.53 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 05:28:30,519 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-11-20 05:28:54,948 WARN L191 SmtUtils]: Spent 14.76 s on a formula simplification that was a NOOP. DAG size: 48 [2019-11-20 05:29:23,855 WARN L191 SmtUtils]: Spent 25.60 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-11-20 05:29:27,872 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-20 05:29:33,307 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2019-11-20 05:29:37,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:29:37,757 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2019-11-20 05:29:37,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 05:29:37,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-11-20 05:29:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:29:37,760 INFO L225 Difference]: With dead ends: 205 [2019-11-20 05:29:37,760 INFO L226 Difference]: Without dead ends: 205 [2019-11-20 05:29:37,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 93.4s TimeCoverageRelationStatistics Valid=145, Invalid=314, Unknown=3, NotChecked=0, Total=462 [2019-11-20 05:29:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-20 05:29:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2019-11-20 05:29:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-20 05:29:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2019-11-20 05:29:37,769 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 22 [2019-11-20 05:29:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:29:37,769 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2019-11-20 05:29:37,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 05:29:37,769 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2019-11-20 05:29:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 05:29:37,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:29:37,770 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:29:37,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:29:37,975 INFO L410 AbstractCegarLoop]: === Iteration 24 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:29:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:29:37,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1509893097, now seen corresponding path program 1 times [2019-11-20 05:29:37,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:29:37,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1274175720] [2019-11-20 05:29:37,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:29:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:29:38,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 05:29:38,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:29:38,426 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 15 treesize of output 11 [2019-11-20 05:29:38,426 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:38,470 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:38,470 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:29:38,471 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2019-11-20 05:29:38,630 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:29:38,633 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:38,633 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 19 treesize of output 12 [2019-11-20 05:29:38,634 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:38,651 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:38,654 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:38,654 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:5 [2019-11-20 05:29:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 05:29:38,685 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:29:38,842 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 15 [2019-11-20 05:29:38,845 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2019-11-20 05:29:38,846 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:38,848 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:38,848 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:38,850 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:38,850 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:38,851 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:6 [2019-11-20 05:29:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 05:29:39,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274175720] [2019-11-20 05:29:39,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:29:39,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2019-11-20 05:29:39,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212713798] [2019-11-20 05:29:39,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 05:29:39,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:29:39,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 05:29:39,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-11-20 05:29:39,179 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand 17 states. [2019-11-20 05:29:39,816 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-11-20 05:29:41,508 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-20 05:29:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:29:42,401 INFO L93 Difference]: Finished difference Result 184 states and 213 transitions. [2019-11-20 05:29:42,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 05:29:42,404 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-11-20 05:29:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:29:42,405 INFO L225 Difference]: With dead ends: 184 [2019-11-20 05:29:42,406 INFO L226 Difference]: Without dead ends: 184 [2019-11-20 05:29:42,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 05:29:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-20 05:29:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 122. [2019-11-20 05:29:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-20 05:29:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2019-11-20 05:29:42,412 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 24 [2019-11-20 05:29:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:29:42,413 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2019-11-20 05:29:42,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 05:29:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2019-11-20 05:29:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 05:29:42,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:29:42,414 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:29:42,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:29:42,618 INFO L410 AbstractCegarLoop]: === Iteration 25 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:29:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:29:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -78454805, now seen corresponding path program 2 times [2019-11-20 05:29:42,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:29:42,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1198682795] [2019-11-20 05:29:42,619 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:29:42,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:29:42,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:29:42,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 05:29:42,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:29:42,938 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:29:42,954 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:42,954 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 05:29:42,954 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:43,050 INFO L567 ElimStorePlain]: treesize reduction 14, result has 70.2 percent of original size [2019-11-20 05:29:43,051 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 05:29:43,051 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:23 [2019-11-20 05:29:43,257 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 15 treesize of output 11 [2019-11-20 05:29:43,257 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:43,357 INFO L567 ElimStorePlain]: treesize reduction 19, result has 68.9 percent of original size [2019-11-20 05:29:43,357 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:29:43,357 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:42 [2019-11-20 05:29:43,560 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:29:43,561 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2019-11-20 05:29:43,562 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:43,592 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:43,593 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:29:43,593 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:35 [2019-11-20 05:29:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 05:29:43,686 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:29:44,739 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 43 [2019-11-20 05:29:44,766 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 27 treesize of output 25 [2019-11-20 05:29:44,773 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 05:29:44,864 INFO L567 ElimStorePlain]: treesize reduction 6, result has 85.7 percent of original size [2019-11-20 05:29:44,864 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:44,876 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 45 [2019-11-20 05:29:44,911 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 27 treesize of output 25 [2019-11-20 05:29:44,912 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-20 05:29:45,015 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-11-20 05:29:45,016 INFO L567 ElimStorePlain]: treesize reduction 6, result has 86.4 percent of original size [2019-11-20 05:29:45,016 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:45,034 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 45 [2019-11-20 05:29:45,081 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 27 treesize of output 25 [2019-11-20 05:29:45,082 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2019-11-20 05:29:45,242 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2019-11-20 05:29:45,242 INFO L567 ElimStorePlain]: treesize reduction 6, result has 86.4 percent of original size [2019-11-20 05:29:45,242 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:45,368 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-11-20 05:29:45,369 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:45,369 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 05:29:45,369 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:140, output treesize:113 [2019-11-20 05:29:45,705 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-20 05:29:46,171 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 05:29:46,840 WARN L191 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2019-11-20 05:29:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:29:46,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1198682795] [2019-11-20 05:29:46,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:29:46,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 22 [2019-11-20 05:29:46,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624220457] [2019-11-20 05:29:46,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 05:29:46,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:29:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 05:29:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2019-11-20 05:29:46,860 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand 12 states. [2019-11-20 05:29:47,763 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2019-11-20 05:29:48,330 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-11-20 05:29:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:29:48,687 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2019-11-20 05:29:48,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 05:29:48,688 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-11-20 05:29:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:29:48,690 INFO L225 Difference]: With dead ends: 186 [2019-11-20 05:29:48,690 INFO L226 Difference]: Without dead ends: 186 [2019-11-20 05:29:48,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2019-11-20 05:29:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-11-20 05:29:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2019-11-20 05:29:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-20 05:29:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2019-11-20 05:29:48,711 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 24 [2019-11-20 05:29:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:29:48,711 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2019-11-20 05:29:48,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 05:29:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2019-11-20 05:29:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 05:29:48,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:29:48,713 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:29:48,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:29:48,917 INFO L410 AbstractCegarLoop]: === Iteration 26 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:29:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:29:48,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2072599511, now seen corresponding path program 1 times [2019-11-20 05:29:48,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:29:48,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1008337676] [2019-11-20 05:29:48,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/cvc4 Starting monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:29:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:29:49,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 05:29:49,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:29:49,209 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:49,209 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 05:29:49,210 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:49,283 INFO L567 ElimStorePlain]: treesize reduction 10, result has 75.0 percent of original size [2019-11-20 05:29:49,284 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 05:29:49,284 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:25, output treesize:20 [2019-11-20 05:29:49,557 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 15 treesize of output 11 [2019-11-20 05:29:49,557 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:49,678 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2019-11-20 05:29:49,679 INFO L567 ElimStorePlain]: treesize reduction 19, result has 63.5 percent of original size [2019-11-20 05:29:49,679 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:29:49,679 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:33 [2019-11-20 05:29:49,959 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:29:49,960 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2019-11-20 05:29:49,961 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:49,998 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:50,002 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:50,002 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:15 [2019-11-20 05:29:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 05:29:50,074 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:29:51,144 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 43 [2019-11-20 05:29:51,170 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 27 treesize of output 25 [2019-11-20 05:29:51,171 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 05:29:51,262 INFO L567 ElimStorePlain]: treesize reduction 6, result has 85.7 percent of original size [2019-11-20 05:29:51,262 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:51,275 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 45 [2019-11-20 05:29:51,314 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 27 treesize of output 25 [2019-11-20 05:29:51,315 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-20 05:29:51,426 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-11-20 05:29:51,426 INFO L567 ElimStorePlain]: treesize reduction 6, result has 86.4 percent of original size [2019-11-20 05:29:51,426 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:51,442 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 45 [2019-11-20 05:29:51,472 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 27 treesize of output 25 [2019-11-20 05:29:51,473 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2019-11-20 05:29:51,585 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2019-11-20 05:29:51,585 INFO L567 ElimStorePlain]: treesize reduction 6, result has 86.4 percent of original size [2019-11-20 05:29:51,586 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:51,718 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-11-20 05:29:51,718 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:51,719 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 05:29:51,719 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:140, output treesize:113 [2019-11-20 05:29:52,019 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-20 05:29:52,415 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 05:29:52,956 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2019-11-20 05:29:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:29:52,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1008337676] [2019-11-20 05:29:52,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:29:52,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 21 [2019-11-20 05:29:52,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397735784] [2019-11-20 05:29:52,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 05:29:52,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:29:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 05:29:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-20 05:29:52,971 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand 11 states. [2019-11-20 05:29:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:29:54,107 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2019-11-20 05:29:54,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 05:29:54,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-20 05:29:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:29:54,109 INFO L225 Difference]: With dead ends: 150 [2019-11-20 05:29:54,110 INFO L226 Difference]: Without dead ends: 150 [2019-11-20 05:29:54,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-20 05:29:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-20 05:29:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2019-11-20 05:29:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-20 05:29:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2019-11-20 05:29:54,115 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 24 [2019-11-20 05:29:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:29:54,115 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2019-11-20 05:29:54,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 05:29:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2019-11-20 05:29:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 05:29:54,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:29:54,116 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 05:29:54,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:29:54,316 INFO L410 AbstractCegarLoop]: === Iteration 27 === [cstrcatErr3REQUIRES_VIOLATION, cstrcatErr2REQUIRES_VIOLATION, cstrcatErr4REQUIRES_VIOLATION, cstrcatErr0REQUIRES_VIOLATION, cstrcatErr5REQUIRES_VIOLATION, cstrcatErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 05:29:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:29:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash -408104677, now seen corresponding path program 1 times [2019-11-20 05:29:54,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:29:54,317 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1864893381] [2019-11-20 05:29:54,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb5680cc-4c52-47f7-8f8b-d1ce8a2353a1/bin/uautomizer/cvc4 Starting monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:29:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:29:54,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 05:29:54,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:29:54,548 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 05:29:54,549 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:54,559 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:54,560 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:54,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-20 05:29:54,587 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 8 [2019-11-20 05:29:54,587 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:54,603 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:54,603 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:54,603 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-20 05:29:54,642 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-11-20 05:29:54,643 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:54,659 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:29:54,660 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:54,660 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2019-11-20 05:29:54,866 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2019-11-20 05:29:54,867 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:29:54,875 INFO L567 ElimStorePlain]: treesize reduction 5, result has 66.7 percent of original size [2019-11-20 05:29:54,876 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:29:54,876 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:5 [2019-11-20 05:29:54,896 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 05:29:54,896 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:30:01,319 WARN L191 SmtUtils]: Spent 6.10 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-20 05:30:01,319 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:30:01,320 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 105 [2019-11-20 05:30:01,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:01,333 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:30:01,333 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:30:05,489 WARN L191 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2019-11-20 05:30:05,489 INFO L567 ElimStorePlain]: treesize reduction 37, result has 60.2 percent of original size [2019-11-20 05:30:05,502 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:30:05,502 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 49 treesize of output 51 [2019-11-20 05:30:05,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:30:05,513 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:30:05,522 INFO L392 ElimStorePlain]: Different costs {0=[v_arrayElimCell_36], 1=[v_arrayElimCell_35]} [2019-11-20 05:30:05,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:30:05,730 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: This case should habe been handled by DER at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:192) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.(DerPreprocessor.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:291) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 05:30:05,733 INFO L168 Benchmark]: Toolchain (without parser) took 163029.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 939.4 MB in the beginning and 905.7 MB in the end (delta: 33.7 MB). Peak memory consumption was 206.7 MB. Max. memory is 11.5 GB. [2019-11-20 05:30:05,733 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 05:30:05,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 624.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -180.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2019-11-20 05:30:05,734 INFO L168 Benchmark]: Boogie Preprocessor took 79.56 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: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. [2019-11-20 05:30:05,734 INFO L168 Benchmark]: RCFGBuilder took 731.82 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: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 11.5 GB. [2019-11-20 05:30:05,734 INFO L168 Benchmark]: TraceAbstraction took 161588.51 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 33.0 MB). Free memory was 1.1 GB in the beginning and 905.7 MB in the end (delta: 156.7 MB). Peak memory consumption was 189.7 MB. Max. memory is 11.5 GB. [2019-11-20 05:30:05,735 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 624.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -180.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 79.56 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: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 731.82 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: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 161588.51 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 33.0 MB). Free memory was 1.1 GB in the beginning and 905.7 MB in the end (delta: 156.7 MB). Peak memory consumption was 189.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: This case should habe been handled by DER: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...