./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 e9f95b6c839057502038c8f9c89c369852ea0865 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 08:55:12,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:55:12,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:55:12,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:55:12,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:55:12,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:55:12,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:55:12,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:55:12,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:55:12,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:55:12,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:55:12,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:55:12,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:55:12,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:55:12,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:55:12,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:55:12,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:55:12,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:55:12,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:55:12,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:55:12,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:55:12,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:55:12,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:55:12,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:55:12,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:55:12,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:55:12,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:55:12,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:55:12,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:55:12,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:55:12,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:55:12,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:55:12,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:55:12,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:55:12,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:55:12,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:55:12,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:55:12,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:55:12,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:55:12,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:55:12,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:55:12,985 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 08:55:13,009 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:55:13,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:55:13,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:55:13,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:55:13,011 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:55:13,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:55:13,011 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:55:13,011 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 08:55:13,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:55:13,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:55:13,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:55:13,012 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 08:55:13,012 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 08:55:13,012 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 08:55:13,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:55:13,013 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 08:55:13,013 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 08:55:13,013 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:55:13,013 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:55:13,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:55:13,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:55:13,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:55:13,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:55:13,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:55:13,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:55:13,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:55:13,015 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 08:55:13,015 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 08:55:13,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 08:55:13,015 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_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 -> e9f95b6c839057502038c8f9c89c369852ea0865 [2019-11-20 08:55:13,173 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:55:13,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:55:13,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:55:13,188 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:55:13,189 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:55:13,189 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2019-11-20 08:55:13,244 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/data/2ff22605f/3cb7303fd6f34e43a91660f2b3597987/FLAG18358e2c0 [2019-11-20 08:55:13,750 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:55:13,750 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2019-11-20 08:55:13,764 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/data/2ff22605f/3cb7303fd6f34e43a91660f2b3597987/FLAG18358e2c0 [2019-11-20 08:55:14,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/data/2ff22605f/3cb7303fd6f34e43a91660f2b3597987 [2019-11-20 08:55:14,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:55:14,260 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 08:55:14,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:55:14,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:55:14,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:55:14,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205e4e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14, skipping insertion in model container [2019-11-20 08:55:14,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,273 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:55:14,313 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:55:14,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:55:14,676 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:55:14,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:55:14,792 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:55:14,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14 WrapperNode [2019-11-20 08:55:14,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:55:14,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:55:14,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:55:14,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:55:14,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (1/1) ... [2019-11-20 08:55:14,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:55:14,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:55:14,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:55:14,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:55:14,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:14,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 08:55:14,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:55:14,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 08:55:14,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 08:55:14,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 08:55:14,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 08:55:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 08:55:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-11-20 08:55:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 08:55:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 08:55:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 08:55:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 08:55:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 08:55:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 08:55:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 08:55:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 08:55:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 08:55:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 08:55:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 08:55:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 08:55:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 08:55:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 08:55:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 08:55:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 08:55:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 08:55:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 08:55:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 08:55:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 08:55:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 08:55:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 08:55:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 08:55:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 08:55:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 08:55:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 08:55:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 08:55:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 08:55:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 08:55:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 08:55:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 08:55:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 08:55:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 08:55:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 08:55:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 08:55:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 08:55:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 08:55:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 08:55:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 08:55:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 08:55:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 08:55:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 08:55:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 08:55:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 08:55:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 08:55:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 08:55:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 08:55:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 08:55:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 08:55:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 08:55:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 08:55:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 08:55:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 08:55:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 08:55:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 08:55:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-11-20 08:55:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 08:55:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 08:55:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 08:55:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 08:55:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 08:55:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 08:55:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:55:15,470 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:55:15,470 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 08:55:15,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:55:15 BoogieIcfgContainer [2019-11-20 08:55:15,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:55:15,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:55:15,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:55:15,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:55:15,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:55:14" (1/3) ... [2019-11-20 08:55:15,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a77eedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:55:15, skipping insertion in model container [2019-11-20 08:55:15,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:14" (2/3) ... [2019-11-20 08:55:15,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a77eedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:55:15, skipping insertion in model container [2019-11-20 08:55:15,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:55:15" (3/3) ... [2019-11-20 08:55:15,478 INFO L109 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2019-11-20 08:55:15,487 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:55:15,494 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2019-11-20 08:55:15,504 INFO L249 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2019-11-20 08:55:15,522 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:55:15,522 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 08:55:15,522 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:55:15,522 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:55:15,522 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:55:15,523 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:55:15,523 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:55:15,523 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:55:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2019-11-20 08:55:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:55:15,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:15,548 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:15,549 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1933192071, now seen corresponding path program 1 times [2019-11-20 08:55:15,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:15,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1798336419] [2019-11-20 08:55:15,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:15,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 08:55:15,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:15,819 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 08:55:15,820 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:15,843 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 08:55:15,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1798336419] [2019-11-20 08:55:15,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:15,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:55:15,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000209815] [2019-11-20 08:55:15,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 08:55:15,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:15,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 08:55:15,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 08:55:15,866 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2019-11-20 08:55:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:15,884 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2019-11-20 08:55:15,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 08:55:15,885 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 08:55:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:15,894 INFO L225 Difference]: With dead ends: 61 [2019-11-20 08:55:15,894 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 08:55:15,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 08:55:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 08:55:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-20 08:55:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-20 08:55:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2019-11-20 08:55:15,936 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 9 [2019-11-20 08:55:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:15,936 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2019-11-20 08:55:15,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 08:55:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2019-11-20 08:55:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:55:15,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:15,938 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:16,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:16,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:16,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1933195915, now seen corresponding path program 1 times [2019-11-20 08:55:16,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:16,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1638343528] [2019-11-20 08:55:16,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:16,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 08:55:16,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:16,390 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 08:55:16,391 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 08:55:16,391 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:16,402 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:16,403 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 08:55:16,404 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 08:55:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:16,422 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:16,432 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 08:55:16,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638343528] [2019-11-20 08:55:16,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:16,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:55:16,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992611603] [2019-11-20 08:55:16,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:55:16,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:16,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:55:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:55:16,435 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 3 states. [2019-11-20 08:55:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:16,519 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2019-11-20 08:55:16,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:55:16,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 08:55:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:16,521 INFO L225 Difference]: With dead ends: 57 [2019-11-20 08:55:16,521 INFO L226 Difference]: Without dead ends: 57 [2019-11-20 08:55:16,522 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 08:55:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-20 08:55:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-20 08:55:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-20 08:55:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-11-20 08:55:16,529 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 9 [2019-11-20 08:55:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:16,529 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-11-20 08:55:16,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:55:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-11-20 08:55:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:55:16,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:16,530 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:16,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:16,732 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1933195914, now seen corresponding path program 1 times [2019-11-20 08:55:16,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:16,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [942208517] [2019-11-20 08:55:16,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:16,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 08:55:16,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:16,975 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 08:55:16,976 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 08:55:16,976 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:16,989 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:16,990 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 08:55:16,990 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-11-20 08:55:17,016 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 08:55:17,017 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:17,098 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 08:55:17,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [942208517] [2019-11-20 08:55:17,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:17,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 08:55:17,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725629450] [2019-11-20 08:55:17,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 08:55:17,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:17,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 08:55:17,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:55:17,100 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 6 states. [2019-11-20 08:55:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:17,462 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2019-11-20 08:55:17,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 08:55:17,463 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-20 08:55:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:17,466 INFO L225 Difference]: With dead ends: 157 [2019-11-20 08:55:17,466 INFO L226 Difference]: Without dead ends: 157 [2019-11-20 08:55:17,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:55:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-20 08:55:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 61. [2019-11-20 08:55:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-20 08:55:17,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-11-20 08:55:17,483 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 9 [2019-11-20 08:55:17,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:17,483 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-11-20 08:55:17,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 08:55:17,484 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-11-20 08:55:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 08:55:17,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:17,484 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:17,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:17,687 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1921285718, now seen corresponding path program 1 times [2019-11-20 08:55:17,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:17,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1548900003] [2019-11-20 08:55:17,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:17,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 08:55:17,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:17,942 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 08:55:17,943 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 08:55:17,943 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:17,956 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:17,957 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 08:55:17,958 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-11-20 08:55:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:17,988 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:18,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1548900003] [2019-11-20 08:55:18,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:55:18,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 08:55:18,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712951019] [2019-11-20 08:55:18,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:55:18,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:55:18,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:55:18,164 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 10 states. [2019-11-20 08:55:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:19,435 INFO L93 Difference]: Finished difference Result 357 states and 378 transitions. [2019-11-20 08:55:19,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 08:55:19,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-11-20 08:55:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:19,439 INFO L225 Difference]: With dead ends: 357 [2019-11-20 08:55:19,440 INFO L226 Difference]: Without dead ends: 357 [2019-11-20 08:55:19,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-11-20 08:55:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2019-11-20 08:55:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 65. [2019-11-20 08:55:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 08:55:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2019-11-20 08:55:19,466 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 11 [2019-11-20 08:55:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:19,467 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2019-11-20 08:55:19,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:55:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2019-11-20 08:55:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 08:55:19,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:19,468 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:19,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:19,671 INFO L410 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1735360771, now seen corresponding path program 1 times [2019-11-20 08:55:19,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:19,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [568435858] [2019-11-20 08:55:19,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:19,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:55:19,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:19,904 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 08:55:19,904 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 08:55:19,905 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:19,911 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:19,911 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:55:19,911 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:11 [2019-11-20 08:55:19,935 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 08:55:19,935 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:19,962 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 08:55:19,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [568435858] [2019-11-20 08:55:19,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:19,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 08:55:19,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618395854] [2019-11-20 08:55:19,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 08:55:19,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 08:55:19,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:55:19,964 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 5 states. [2019-11-20 08:55:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:20,050 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2019-11-20 08:55:20,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 08:55:20,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-20 08:55:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:20,053 INFO L225 Difference]: With dead ends: 62 [2019-11-20 08:55:20,053 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 08:55:20,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:55:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 08:55:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-20 08:55:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 08:55:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2019-11-20 08:55:20,059 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 14 [2019-11-20 08:55:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:20,059 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2019-11-20 08:55:20,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 08:55:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2019-11-20 08:55:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 08:55:20,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:20,060 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:20,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:20,263 INFO L410 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1735360770, now seen corresponding path program 1 times [2019-11-20 08:55:20,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:20,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1829298954] [2019-11-20 08:55:20,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:20,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 08:55:20,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:20,471 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_21|], 1=[|v_#valid_54|]} [2019-11-20 08:55:20,476 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:55:20,486 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 08:55:20,487 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:20,499 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:20,507 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 08:55:20,507 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:20,517 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:20,518 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:55:20,518 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2019-11-20 08:55:20,559 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 08:55:20,559 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:20,668 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 08:55:20,673 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 08:55:20,673 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:20,680 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:20,689 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:55:20,690 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:20,706 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:20,707 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 08:55:20,707 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:25, output treesize:5 [2019-11-20 08:55:20,745 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 08:55:20,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829298954] [2019-11-20 08:55:20,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:20,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 08:55:20,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664305685] [2019-11-20 08:55:20,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:55:20,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:55:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:55:20,747 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2019-11-20 08:55:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:21,692 INFO L93 Difference]: Finished difference Result 161 states and 175 transitions. [2019-11-20 08:55:21,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 08:55:21,696 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-20 08:55:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:21,698 INFO L225 Difference]: With dead ends: 161 [2019-11-20 08:55:21,698 INFO L226 Difference]: Without dead ends: 161 [2019-11-20 08:55:21,699 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 08:55:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-20 08:55:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 96. [2019-11-20 08:55:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-20 08:55:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2019-11-20 08:55:21,708 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 14 [2019-11-20 08:55:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:21,708 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2019-11-20 08:55:21,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:55:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2019-11-20 08:55:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 08:55:21,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:21,710 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:21,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:21,912 INFO L410 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash -412104682, now seen corresponding path program 2 times [2019-11-20 08:55:21,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:21,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [868647542] [2019-11-20 08:55:21,913 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:22,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 08:55:22,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:55:22,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 08:55:22,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:22,165 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 08:55:22,165 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 08:55:22,166 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:22,172 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:22,172 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 08:55:22,173 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-11-20 08:55:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:22,197 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:22,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [868647542] [2019-11-20 08:55:22,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:55:22,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2019-11-20 08:55:22,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646742874] [2019-11-20 08:55:22,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 08:55:22,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:22,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 08:55:22,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-11-20 08:55:22,490 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand 18 states. [2019-11-20 08:55:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:25,855 INFO L93 Difference]: Finished difference Result 710 states and 755 transitions. [2019-11-20 08:55:25,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-20 08:55:25,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-11-20 08:55:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:25,861 INFO L225 Difference]: With dead ends: 710 [2019-11-20 08:55:25,861 INFO L226 Difference]: Without dead ends: 710 [2019-11-20 08:55:25,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=463, Invalid=1019, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 08:55:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2019-11-20 08:55:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 104. [2019-11-20 08:55:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-20 08:55:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 132 transitions. [2019-11-20 08:55:25,887 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 132 transitions. Word has length 15 [2019-11-20 08:55:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:25,888 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 132 transitions. [2019-11-20 08:55:25,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 08:55:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 132 transitions. [2019-11-20 08:55:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 08:55:25,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:25,889 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:26,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:26,095 INFO L410 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash 327307806, now seen corresponding path program 1 times [2019-11-20 08:55:26,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:26,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1412189055] [2019-11-20 08:55:26,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:26,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 08:55:26,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:26,279 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_63|]} [2019-11-20 08:55:26,285 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:55:26,285 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 08:55:26,286 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:26,294 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:26,298 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 08:55:26,299 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:26,308 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:26,309 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:55:26,309 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2019-11-20 08:55:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:26,353 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:26,555 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 08:55:26,564 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 08:55:26,564 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:26,575 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:26,577 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:55:26,577 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:26,584 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:26,584 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 08:55:26,584 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:25, output treesize:5 [2019-11-20 08:55:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:26,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412189055] [2019-11-20 08:55:26,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:55:26,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 08:55:26,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045052164] [2019-11-20 08:55:26,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 08:55:26,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 08:55:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-20 08:55:26,682 INFO L87 Difference]: Start difference. First operand 104 states and 132 transitions. Second operand 12 states. [2019-11-20 08:55:27,791 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-11-20 08:55:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:29,371 INFO L93 Difference]: Finished difference Result 398 states and 436 transitions. [2019-11-20 08:55:29,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 08:55:29,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-11-20 08:55:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:29,373 INFO L225 Difference]: With dead ends: 398 [2019-11-20 08:55:29,373 INFO L226 Difference]: Without dead ends: 398 [2019-11-20 08:55:29,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-20 08:55:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2019-11-20 08:55:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 124. [2019-11-20 08:55:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-20 08:55:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2019-11-20 08:55:29,384 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 16 [2019-11-20 08:55:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:29,384 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2019-11-20 08:55:29,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 08:55:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2019-11-20 08:55:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 08:55:29,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:29,385 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:29,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:29,588 INFO L410 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2056928417, now seen corresponding path program 1 times [2019-11-20 08:55:29,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:29,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [273563589] [2019-11-20 08:55:29,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:29,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 08:55:29,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:29,748 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 08:55:29,748 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:29,780 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 08:55:29,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [273563589] [2019-11-20 08:55:29,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:55:29,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-20 08:55:29,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774763589] [2019-11-20 08:55:29,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:55:29,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:55:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:55:29,781 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand 8 states. [2019-11-20 08:55:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:30,031 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2019-11-20 08:55:30,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 08:55:30,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-20 08:55:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:30,034 INFO L225 Difference]: With dead ends: 217 [2019-11-20 08:55:30,034 INFO L226 Difference]: Without dead ends: 217 [2019-11-20 08:55:30,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-11-20 08:55:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-11-20 08:55:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 144. [2019-11-20 08:55:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-20 08:55:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 182 transitions. [2019-11-20 08:55:30,043 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 182 transitions. Word has length 17 [2019-11-20 08:55:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:30,043 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 182 transitions. [2019-11-20 08:55:30,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:55:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 182 transitions. [2019-11-20 08:55:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 08:55:30,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:30,044 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:30,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:30,245 INFO L410 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash 388658611, now seen corresponding path program 1 times [2019-11-20 08:55:30,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:30,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [14629387] [2019-11-20 08:55:30,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:30,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 08:55:30,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:30,432 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:30,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14629387] [2019-11-20 08:55:30,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:55:30,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-20 08:55:30,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735726253] [2019-11-20 08:55:30,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:55:30,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:55:30,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:55:30,463 INFO L87 Difference]: Start difference. First operand 144 states and 182 transitions. Second operand 8 states. [2019-11-20 08:55:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:30,566 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2019-11-20 08:55:30,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 08:55:30,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-20 08:55:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:30,568 INFO L225 Difference]: With dead ends: 170 [2019-11-20 08:55:30,568 INFO L226 Difference]: Without dead ends: 170 [2019-11-20 08:55:30,569 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:55:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-20 08:55:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2019-11-20 08:55:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-20 08:55:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2019-11-20 08:55:30,575 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 17 [2019-11-20 08:55:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:30,575 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2019-11-20 08:55:30,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:55:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2019-11-20 08:55:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 08:55:30,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:30,576 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 08:55:30,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:30,777 INFO L410 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash -658131846, now seen corresponding path program 1 times [2019-11-20 08:55:30,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:30,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1255239302] [2019-11-20 08:55:30,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:30,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:55:30,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:30,970 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_29|], 1=[|v_#valid_76|]} [2019-11-20 08:55:30,973 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:55:30,974 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 08:55:30,974 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:30,985 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:30,999 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 08:55:31,000 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:31,011 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:31,012 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:55:31,012 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2019-11-20 08:55:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:31,105 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:31,480 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 08:55:31,493 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 08:55:31,494 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:31,505 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:31,507 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:55:31,507 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:31,519 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:31,520 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 08:55:31,520 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2019-11-20 08:55:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:31,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1255239302] [2019-11-20 08:55:31,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:55:31,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2019-11-20 08:55:31,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209158517] [2019-11-20 08:55:31,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 08:55:31,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:31,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 08:55:31,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-20 08:55:31,641 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand 13 states. [2019-11-20 08:55:32,549 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-20 08:55:33,276 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-20 08:55:33,660 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-11-20 08:55:33,887 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2019-11-20 08:55:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:35,867 INFO L93 Difference]: Finished difference Result 300 states and 332 transitions. [2019-11-20 08:55:35,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 08:55:35,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-11-20 08:55:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:35,873 INFO L225 Difference]: With dead ends: 300 [2019-11-20 08:55:35,873 INFO L226 Difference]: Without dead ends: 300 [2019-11-20 08:55:35,874 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2019-11-20 08:55:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-11-20 08:55:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 169. [2019-11-20 08:55:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-11-20 08:55:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 213 transitions. [2019-11-20 08:55:35,882 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 213 transitions. Word has length 18 [2019-11-20 08:55:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:35,882 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 213 transitions. [2019-11-20 08:55:35,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 08:55:35,882 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 213 transitions. [2019-11-20 08:55:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 08:55:35,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:35,886 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:36,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:36,090 INFO L410 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:36,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:36,090 INFO L82 PathProgramCache]: Analyzing trace with hash -757129122, now seen corresponding path program 2 times [2019-11-20 08:55:36,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:36,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [755285157] [2019-11-20 08:55:36,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:36,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 08:55:36,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:55:36,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:55:36,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:36,268 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_31|], 1=[|v_#valid_81|]} [2019-11-20 08:55:36,272 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:55:36,273 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 13 treesize of output 15 [2019-11-20 08:55:36,273 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:36,291 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:36,298 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 08:55:36,298 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:36,324 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:36,325 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:55:36,325 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:25 [2019-11-20 08:55:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:55:36,399 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:55:36,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [755285157] [2019-11-20 08:55:36,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:36,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 08:55:36,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157520515] [2019-11-20 08:55:36,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:55:36,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:36,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:55:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:55:36,584 INFO L87 Difference]: Start difference. First operand 169 states and 213 transitions. Second operand 8 states. [2019-11-20 08:55:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:36,982 INFO L93 Difference]: Finished difference Result 189 states and 242 transitions. [2019-11-20 08:55:36,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 08:55:36,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-20 08:55:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:36,984 INFO L225 Difference]: With dead ends: 189 [2019-11-20 08:55:36,984 INFO L226 Difference]: Without dead ends: 189 [2019-11-20 08:55:36,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:55:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-20 08:55:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2019-11-20 08:55:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-20 08:55:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 184 transitions. [2019-11-20 08:55:36,991 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 184 transitions. Word has length 20 [2019-11-20 08:55:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:36,991 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 184 transitions. [2019-11-20 08:55:36,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:55:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 184 transitions. [2019-11-20 08:55:36,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 08:55:36,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:36,993 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:37,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:37,193 INFO L410 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1130852211, now seen corresponding path program 2 times [2019-11-20 08:55:37,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:37,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1959893471] [2019-11-20 08:55:37,194 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:37,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 08:55:37,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:55:37,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 08:55:37,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:37,419 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_33|], 1=[|v_#valid_86|]} [2019-11-20 08:55:37,425 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:55:37,425 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 08:55:37,426 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:37,443 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:37,447 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 08:55:37,448 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:37,457 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:37,457 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:55:37,458 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2019-11-20 08:55:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:37,609 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:38,035 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 08:55:38,042 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 08:55:38,042 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:38,053 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:38,055 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:55:38,056 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:38,066 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:38,066 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 08:55:38,066 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:12 [2019-11-20 08:55:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:38,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1959893471] [2019-11-20 08:55:38,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:55:38,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2019-11-20 08:55:38,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63688952] [2019-11-20 08:55:38,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 08:55:38,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:38,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 08:55:38,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-11-20 08:55:38,400 INFO L87 Difference]: Start difference. First operand 148 states and 184 transitions. Second operand 20 states. [2019-11-20 08:55:39,788 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-11-20 08:55:40,285 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 08:55:40,717 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-11-20 08:55:41,825 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 08:55:42,470 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-11-20 08:55:43,189 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-20 08:55:43,439 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 08:55:43,945 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 08:55:44,933 WARN L191 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2019-11-20 08:55:45,814 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2019-11-20 08:55:46,223 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-20 08:55:47,101 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-11-20 08:55:47,499 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 08:55:48,355 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2019-11-20 08:55:50,409 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-11-20 08:55:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:58,935 INFO L93 Difference]: Finished difference Result 693 states and 754 transitions. [2019-11-20 08:55:58,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-20 08:55:58,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2019-11-20 08:55:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:58,941 INFO L225 Difference]: With dead ends: 693 [2019-11-20 08:55:58,941 INFO L226 Difference]: Without dead ends: 693 [2019-11-20 08:55:58,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1198, Invalid=3494, Unknown=0, NotChecked=0, Total=4692 [2019-11-20 08:55:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-11-20 08:55:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 177. [2019-11-20 08:55:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-20 08:55:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 222 transitions. [2019-11-20 08:55:58,968 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 222 transitions. Word has length 21 [2019-11-20 08:55:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:58,968 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 222 transitions. [2019-11-20 08:55:58,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 08:55:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 222 transitions. [2019-11-20 08:55:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 08:55:58,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:58,971 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] [2019-11-20 08:55:59,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:59,174 INFO L410 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:55:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash -281530723, now seen corresponding path program 1 times [2019-11-20 08:55:59,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:59,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [28740017] [2019-11-20 08:55:59,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:55:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:59,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 08:55:59,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:59,466 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:59,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [28740017] [2019-11-20 08:55:59,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:55:59,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-20 08:55:59,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472837959] [2019-11-20 08:55:59,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 08:55:59,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 08:55:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-20 08:55:59,613 INFO L87 Difference]: Start difference. First operand 177 states and 222 transitions. Second operand 12 states. [2019-11-20 08:56:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:56:00,330 INFO L93 Difference]: Finished difference Result 279 states and 316 transitions. [2019-11-20 08:56:00,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 08:56:00,331 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-11-20 08:56:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:56:00,333 INFO L225 Difference]: With dead ends: 279 [2019-11-20 08:56:00,333 INFO L226 Difference]: Without dead ends: 279 [2019-11-20 08:56:00,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-11-20 08:56:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-11-20 08:56:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 186. [2019-11-20 08:56:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-20 08:56:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 231 transitions. [2019-11-20 08:56:00,343 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 231 transitions. Word has length 21 [2019-11-20 08:56:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:56:00,344 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 231 transitions. [2019-11-20 08:56:00,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 08:56:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 231 transitions. [2019-11-20 08:56:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 08:56:00,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:56:00,344 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:56:00,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:56:00,545 INFO L410 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:56:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:56:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash 119897783, now seen corresponding path program 3 times [2019-11-20 08:56:00,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:56:00,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1064653810] [2019-11-20 08:56:00,546 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:56:00,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 08:56:00,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:56:00,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 08:56:00,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:56:00,750 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_95|]} [2019-11-20 08:56:00,755 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:56:00,755 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 13 treesize of output 15 [2019-11-20 08:56:00,756 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:56:00,770 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:56:00,775 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 08:56:00,775 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:56:00,789 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:56:00,789 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:56:00,789 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:30 [2019-11-20 08:56:00,962 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 21 [2019-11-20 08:56:00,962 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:56:00,998 INFO L567 ElimStorePlain]: treesize reduction 28, result has 31.7 percent of original size [2019-11-20 08:56:00,998 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 08:56:00,999 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:9 [2019-11-20 08:56:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:56:01,040 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:56:01,423 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 08:56:01,429 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 08:56:01,429 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:56:01,449 INFO L567 ElimStorePlain]: treesize reduction 6, result has 80.0 percent of original size [2019-11-20 08:56:01,450 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:56:01,451 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:56:01,460 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:56:01,460 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 08:56:01,461 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:36, output treesize:11 [2019-11-20 08:56:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:56:01,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1064653810] [2019-11-20 08:56:01,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:56:01,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-20 08:56:01,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888631369] [2019-11-20 08:56:01,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 08:56:01,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:56:01,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 08:56:01,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-11-20 08:56:01,554 INFO L87 Difference]: Start difference. First operand 186 states and 231 transitions. Second operand 18 states. [2019-11-20 08:56:02,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:56:02,662 INFO L93 Difference]: Finished difference Result 235 states and 273 transitions. [2019-11-20 08:56:02,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 08:56:02,664 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-11-20 08:56:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:56:02,666 INFO L225 Difference]: With dead ends: 235 [2019-11-20 08:56:02,666 INFO L226 Difference]: Without dead ends: 235 [2019-11-20 08:56:02,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-11-20 08:56:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-11-20 08:56:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 179. [2019-11-20 08:56:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-20 08:56:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2019-11-20 08:56:02,672 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 21 [2019-11-20 08:56:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:56:02,672 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2019-11-20 08:56:02,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 08:56:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2019-11-20 08:56:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 08:56:02,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:56:02,673 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 08:56:02,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:56:02,877 INFO L410 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:56:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:56:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash -371863304, now seen corresponding path program 1 times [2019-11-20 08:56:02,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:56:02,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1460624624] [2019-11-20 08:56:02,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:56:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:56:03,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:56:03,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:56:03,044 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 08:56:03,045 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 08:56:03,045 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:56:03,057 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:56:03,057 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 08:56:03,058 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-11-20 08:56:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 08:56:03,077 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:56:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 08:56:03,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460624624] [2019-11-20 08:56:03,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:56:03,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 08:56:03,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86131407] [2019-11-20 08:56:03,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 08:56:03,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:56:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 08:56:03,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:56:03,105 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand 5 states. [2019-11-20 08:56:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:56:03,171 INFO L93 Difference]: Finished difference Result 177 states and 211 transitions. [2019-11-20 08:56:03,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 08:56:03,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-20 08:56:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:56:03,177 INFO L225 Difference]: With dead ends: 177 [2019-11-20 08:56:03,177 INFO L226 Difference]: Without dead ends: 177 [2019-11-20 08:56:03,177 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:56:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-20 08:56:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2019-11-20 08:56:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-20 08:56:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2019-11-20 08:56:03,184 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 21 [2019-11-20 08:56:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:56:03,185 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2019-11-20 08:56:03,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 08:56:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2019-11-20 08:56:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 08:56:03,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:56:03,188 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 08:56:03,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:56:03,392 INFO L410 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 08:56:03,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:56:03,392 INFO L82 PathProgramCache]: Analyzing trace with hash -371863303, now seen corresponding path program 1 times [2019-11-20 08:56:03,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:56:03,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1167560576] [2019-11-20 08:56:03,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/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 08:56:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 08:56:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 08:56:03,655 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 08:56:03,655 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 08:56:03,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:56:03,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:56:03 BoogieIcfgContainer [2019-11-20 08:56:03,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 08:56:03,892 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 08:56:03,893 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 08:56:03,893 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 08:56:03,893 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:55:15" (3/4) ... [2019-11-20 08:56:03,900 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 08:56:03,956 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0b374a67-6835-42f3-b468-d0cb337b8ef1/bin/uautomizer/witness.graphml [2019-11-20 08:56:03,956 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 08:56:03,958 INFO L168 Benchmark]: Toolchain (without parser) took 49697.92 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 339.2 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -207.3 MB). Peak memory consumption was 131.9 MB. Max. memory is 11.5 GB. [2019-11-20 08:56:03,958 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:56:03,958 INFO L168 Benchmark]: CACSL2BoogieTranslator took 532.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -161.8 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-11-20 08:56:03,959 INFO L168 Benchmark]: Boogie Preprocessor took 95.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:56:03,959 INFO L168 Benchmark]: RCFGBuilder took 581.56 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: 54.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:56:03,959 INFO L168 Benchmark]: TraceAbstraction took 48420.08 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 209.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -113.5 MB). Peak memory consumption was 95.7 MB. Max. memory is 11.5 GB. [2019-11-20 08:56:03,960 INFO L168 Benchmark]: Witness Printer took 64.18 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. [2019-11-20 08:56:03,961 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 532.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -161.8 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 95.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 581.56 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: 54.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 48420.08 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 209.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -113.5 MB). Peak memory consumption was 95.7 MB. Max. memory is 11.5 GB. * Witness Printer took 64.18 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 533]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L512] int *a, *b; [L513] int n; VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=0] [L525] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L526] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L529] a = malloc(n * sizeof(*a)) [L530] b = malloc(n * sizeof(*b)) [L531] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, b++={6:0}, malloc(n * sizeof(*a))={3:0}, malloc(n * sizeof(*b))={6:0}, n=1] [L531] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, b++={6:0}, malloc(n * sizeof(*a))={3:0}, malloc(n * sizeof(*b))={6:0}, n=1] [L532] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, n=1] [L517] int i; [L518] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, i=0, n=1] [L518] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, i=0, n=1] [L519] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, i=0, n=1] [L518] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, i=1, n=1] [L518] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, i=1, n=1] [L520] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, i=0, n=1] [L520] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, i=0, n=1] [L532] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={3:0}, b={6:4}, malloc(n * sizeof(*a))={3:0}, malloc(n * sizeof(*b))={6:0}, n=1] [L533] b[-2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 76 locations, 21 error locations. Result: UNSAFE, OverallTime: 48.3s, OverallIterations: 17, TraceHistogramMax: 6, AutomataDifference: 36.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1433 SDtfs, 8623 SDslu, 6814 SDs, 0 SdLazy, 4960 SolverSat, 956 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 626 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 20.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 2270 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 274 NumberOfCodeBlocks, 268 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 474 ConstructedInterpolants, 43 QuantifiedInterpolants, 63878 SizeOfPredicates, 82 NumberOfNonLiveVariables, 1291 ConjunctsInSsa, 129 ConjunctsInUnsatCore, 32 InterpolantComputations, 14 PerfectInterpolantSequences, 50/158 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...