./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa 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_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 df3db790fa8159689a8da2e25598b93c123cddf7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: incompatible size --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-25 08:52:13,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:52:13,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:52:13,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:52:13,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:52:13,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:52:13,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:52:13,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:52:13,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:52:13,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:52:13,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:52:13,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:52:13,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:52:13,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:52:13,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:52:13,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:52:13,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:52:13,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:52:13,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:52:13,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:52:13,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:52:13,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:52:13,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:52:13,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:52:13,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:52:13,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:52:13,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:52:13,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:52:13,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:52:13,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:52:13,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:52:13,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:52:13,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:52:13,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:52:13,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:52:13,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:52:13,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:52:13,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:52:13,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:52:13,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:52:13,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:52:13,866 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:52:13,877 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:52:13,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:52:13,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:52:13,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:52:13,879 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:52:13,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:52:13,879 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:52:13,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:52:13,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:52:13,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:52:13,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:52:13,880 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:52:13,880 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:52:13,880 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:52:13,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:52:13,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:52:13,881 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:52:13,881 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:52:13,881 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:52:13,881 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:52:13,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:52:13,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:52:13,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:52:13,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:52:13,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:52:13,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:52:13,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:52:13,883 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:52:13,883 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:52:13,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:52:13,884 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_ca5646b2-d995-4890-b754-1885cf311cdf/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 -> df3db790fa8159689a8da2e25598b93c123cddf7 [2019-11-25 08:52:14,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:52:14,068 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:52:14,071 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:52:14,073 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:52:14,073 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:52:14,074 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2019-11-25 08:52:14,129 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/data/ef37734d8/1cdddffd5de64e95b19005dce06b7123/FLAG0ec9a10db [2019-11-25 08:52:14,557 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:52:14,558 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2019-11-25 08:52:14,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/data/ef37734d8/1cdddffd5de64e95b19005dce06b7123/FLAG0ec9a10db [2019-11-25 08:52:14,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/bin/uautomizer/data/ef37734d8/1cdddffd5de64e95b19005dce06b7123 [2019-11-25 08:52:14,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:52:14,888 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:52:14,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:14,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:52:14,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:52:14,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:14" (1/1) ... [2019-11-25 08:52:14,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@319691ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:14, skipping insertion in model container [2019-11-25 08:52:14,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:14" (1/1) ... [2019-11-25 08:52:14,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:52:14,966 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:52:15,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:15,432 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:52:15,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:15,574 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:52:15,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15 WrapperNode [2019-11-25 08:52:15,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:15,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:52:15,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:52:15,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:52:15,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (1/1) ... [2019-11-25 08:52:15,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (1/1) ... [2019-11-25 08:52:15,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (1/1) ... [2019-11-25 08:52:15,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (1/1) ... [2019-11-25 08:52:15,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (1/1) ... [2019-11-25 08:52:15,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (1/1) ... [2019-11-25 08:52:15,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (1/1) ... [2019-11-25 08:52:15,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:52:15,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:52:15,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:52:15,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:52:15,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:15,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:52:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:52:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:52:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-25 08:52:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-25 08:52:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-25 08:52:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-25 08:52:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-25 08:52:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2019-11-25 08:52:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:52:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-25 08:52:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-25 08:52:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-25 08:52:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-25 08:52:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-25 08:52:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-25 08:52:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-25 08:52:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-25 08:52:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-25 08:52:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-25 08:52:15,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-25 08:52:15,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-25 08:52:15,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-25 08:52:15,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-25 08:52:15,702 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-25 08:52:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-25 08:52:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-25 08:52:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-25 08:52:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-25 08:52:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-25 08:52:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-25 08:52:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-25 08:52:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-25 08:52:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-25 08:52:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-25 08:52:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-25 08:52:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-25 08:52:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-25 08:52:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-25 08:52:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-25 08:52:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-25 08:52:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-25 08:52:15,706 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-25 08:52:15,706 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-25 08:52:15,706 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-25 08:52:15,706 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-25 08:52:15,706 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-25 08:52:15,706 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-25 08:52:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-25 08:52:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-25 08:52:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-25 08:52:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-25 08:52:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-25 08:52:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-25 08:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-25 08:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-25 08:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-25 08:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-25 08:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-25 08:52:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-25 08:52:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-25 08:52:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-25 08:52:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-25 08:52:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-25 08:52:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-25 08:52:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-25 08:52:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:52:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-25 08:52:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:52:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-25 08:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-25 08:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-25 08:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-25 08:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-25 08:52:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-25 08:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-25 08:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-25 08:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-25 08:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-25 08:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-25 08:52:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-25 08:52:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-25 08:52:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-25 08:52:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-25 08:52:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-25 08:52:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-25 08:52:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-25 08:52:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-25 08:52:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-25 08:52:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-25 08:52:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-25 08:52:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-25 08:52:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-25 08:52:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-25 08:52:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-25 08:52:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-25 08:52:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-25 08:52:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-25 08:52:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-25 08:52:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-25 08:52:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-25 08:52:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-25 08:52:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-25 08:52:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-25 08:52:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-25 08:52:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-25 08:52:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-25 08:52:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-25 08:52:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-25 08:52:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-25 08:52:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-25 08:52:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-25 08:52:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-25 08:52:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-25 08:52:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-25 08:52:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-25 08:52:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-25 08:52:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:52:15,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-25 08:52:15,720 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2019-11-25 08:52:15,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-25 08:52:15,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:52:15,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:52:15,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-25 08:52:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:52:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:52:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:52:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:52:16,446 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:52:16,446 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-25 08:52:16,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:16 BoogieIcfgContainer [2019-11-25 08:52:16,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:52:16,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:52:16,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:52:16,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:52:16,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:52:14" (1/3) ... [2019-11-25 08:52:16,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533d3b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:52:16, skipping insertion in model container [2019-11-25 08:52:16,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:15" (2/3) ... [2019-11-25 08:52:16,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533d3b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:52:16, skipping insertion in model container [2019-11-25 08:52:16,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:16" (3/3) ... [2019-11-25 08:52:16,455 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2019-11-25 08:52:16,465 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:52:16,472 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2019-11-25 08:52:16,485 INFO L249 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2019-11-25 08:52:16,505 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:52:16,506 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:52:16,506 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:52:16,506 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:52:16,506 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:52:16,507 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:52:16,507 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:52:16,507 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:52:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2019-11-25 08:52:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:52:16,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:16,535 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:16,535 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:16,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1573084252, now seen corresponding path program 1 times [2019-11-25 08:52:16,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:16,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1980921809] [2019-11-25 08:52:16,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:52:16,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:16,956 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:52:16,957 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2019-11-25 08:52:16,957 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:16,971 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:16,972 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. [2019-11-25 08:52:16,972 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-11-25 08:52:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:16,998 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:17,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1980921809] [2019-11-25 08:52:17,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:17,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-25 08:52:17,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000390500] [2019-11-25 08:52:17,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:52:17,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:52:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:52:17,047 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2019-11-25 08:52:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:17,215 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2019-11-25 08:52:17,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:52:17,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-25 08:52:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:17,230 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:52:17,230 INFO L226 Difference]: Without dead ends: 56 [2019-11-25 08:52:17,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:52:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-25 08:52:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-25 08:52:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-25 08:52:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-25 08:52:17,273 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 11 [2019-11-25 08:52:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:17,273 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-25 08:52:17,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:52:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-25 08:52:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:52:17,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:17,274 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:17,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:17,479 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:17,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1573084253, now seen corresponding path program 1 times [2019-11-25 08:52:17,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:17,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1172553231] [2019-11-25 08:52:17,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:17,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:52:17,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:17,726 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_38|]} [2019-11-25 08:52:17,735 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:52:17,737 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 [2019-11-25 08:52:17,738 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:17,770 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:17,779 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 [2019-11-25 08:52:17,779 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:17,806 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:17,807 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:17,808 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2019-11-25 08:52:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:17,827 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:17,931 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:52:17,953 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 [2019-11-25 08:52:17,954 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:17,968 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:17,971 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-25 08:52:17,972 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:17,980 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:17,980 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:17,980 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2019-11-25 08:52:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:17,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1172553231] [2019-11-25 08:52:17,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:17,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-25 08:52:17,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933498864] [2019-11-25 08:52:17,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:52:17,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:17,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:52:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:52:17,992 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 5 states. [2019-11-25 08:52:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:18,608 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2019-11-25 08:52:18,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:52:18,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-25 08:52:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:18,612 INFO L225 Difference]: With dead ends: 76 [2019-11-25 08:52:18,612 INFO L226 Difference]: Without dead ends: 76 [2019-11-25 08:52:18,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-25 08:52:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2019-11-25 08:52:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-25 08:52:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-11-25 08:52:18,624 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 11 [2019-11-25 08:52:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:18,625 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-11-25 08:52:18,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:52:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-11-25 08:52:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:52:18,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:18,626 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:18,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:18,830 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:18,831 INFO L82 PathProgramCache]: Analyzing trace with hash -94570284, now seen corresponding path program 1 times [2019-11-25 08:52:18,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:18,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1767765002] [2019-11-25 08:52:18,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:52:19,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:19,104 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_27|], 1=[|v_#valid_43|]} [2019-11-25 08:52:19,115 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:52:19,117 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 [2019-11-25 08:52:19,117 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:19,155 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:19,167 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 [2019-11-25 08:52:19,168 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:19,202 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:19,203 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:19,203 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-25 08:52:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:19,276 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:19,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-25 08:52:19,574 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:52:19,580 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:52:19,581 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:19,612 INFO L567 ElimStorePlain]: treesize reduction 18, result has 21.7 percent of original size [2019-11-25 08:52:19,612 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-25 08:52:19,612 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:19,613 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:5 [2019-11-25 08:52:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:19,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1767765002] [2019-11-25 08:52:19,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:19,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-25 08:52:19,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016670028] [2019-11-25 08:52:19,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:52:19,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:19,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:52:19,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:52:19,666 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 8 states. [2019-11-25 08:52:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:20,287 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-11-25 08:52:20,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:52:20,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-25 08:52:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:20,289 INFO L225 Difference]: With dead ends: 74 [2019-11-25 08:52:20,289 INFO L226 Difference]: Without dead ends: 74 [2019-11-25 08:52:20,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-25 08:52:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2019-11-25 08:52:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-25 08:52:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-11-25 08:52:20,296 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 13 [2019-11-25 08:52:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:20,297 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-11-25 08:52:20,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:52:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-11-25 08:52:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:52:20,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:20,298 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:20,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:20,501 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:20,518 INFO L82 PathProgramCache]: Analyzing trace with hash -94570232, now seen corresponding path program 1 times [2019-11-25 08:52:20,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:20,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1703376190] [2019-11-25 08:52:20,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:20,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:52:20,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:20,719 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:20,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1703376190] [2019-11-25 08:52:20,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:20,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-25 08:52:20,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087170552] [2019-11-25 08:52:20,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:52:20,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:20,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:52:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:20,766 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 6 states. [2019-11-25 08:52:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:20,832 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2019-11-25 08:52:20,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:52:20,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-25 08:52:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:20,834 INFO L225 Difference]: With dead ends: 75 [2019-11-25 08:52:20,834 INFO L226 Difference]: Without dead ends: 75 [2019-11-25 08:52:20,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-25 08:52:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2019-11-25 08:52:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:52:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2019-11-25 08:52:20,843 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 13 [2019-11-25 08:52:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:20,843 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2019-11-25 08:52:20,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:52:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2019-11-25 08:52:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:52:20,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:20,844 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:21,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:21,046 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:21,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:21,046 INFO L82 PathProgramCache]: Analyzing trace with hash -37311930, now seen corresponding path program 1 times [2019-11-25 08:52:21,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:21,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1351947258] [2019-11-25 08:52:21,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:21,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:52:21,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:21,191 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:52:21,191 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 [2019-11-25 08:52:21,192 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:21,201 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:21,202 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. [2019-11-25 08:52:21,202 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-25 08:52:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:21,220 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:21,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1351947258] [2019-11-25 08:52:21,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:21,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:52:21,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017303335] [2019-11-25 08:52:21,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:52:21,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:21,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:52:21,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:52:21,239 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 3 states. [2019-11-25 08:52:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:21,303 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2019-11-25 08:52:21,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:52:21,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-25 08:52:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:21,305 INFO L225 Difference]: With dead ends: 64 [2019-11-25 08:52:21,305 INFO L226 Difference]: Without dead ends: 64 [2019-11-25 08:52:21,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:52:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-25 08:52:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-25 08:52:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-25 08:52:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2019-11-25 08:52:21,310 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 13 [2019-11-25 08:52:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:21,311 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2019-11-25 08:52:21,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:52:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2019-11-25 08:52:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:52:21,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:21,312 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:21,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:21,514 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash -37311929, now seen corresponding path program 1 times [2019-11-25 08:52:21,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:21,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1974394705] [2019-11-25 08:52:21,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:21,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:52:21,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:21,739 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:21,740 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-25 08:52:21,740 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:21,800 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-25 08:52:21,800 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:21,801 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2019-11-25 08:52:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:21,829 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:21,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1974394705] [2019-11-25 08:52:21,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:21,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-25 08:52:21,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603459535] [2019-11-25 08:52:21,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:52:21,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:52:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:21,939 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 7 states. [2019-11-25 08:52:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:22,346 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2019-11-25 08:52:22,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:52:22,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-25 08:52:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:22,348 INFO L225 Difference]: With dead ends: 75 [2019-11-25 08:52:22,348 INFO L226 Difference]: Without dead ends: 75 [2019-11-25 08:52:22,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-25 08:52:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2019-11-25 08:52:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:52:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2019-11-25 08:52:22,353 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 13 [2019-11-25 08:52:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:22,354 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2019-11-25 08:52:22,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:52:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2019-11-25 08:52:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:52:22,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:22,354 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:22,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:22,555 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:22,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1363288560, now seen corresponding path program 1 times [2019-11-25 08:52:22,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:22,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1124231440] [2019-11-25 08:52:22,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:22,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:52:22,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:22,729 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:22,729 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-25 08:52:22,730 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:22,757 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-25 08:52:22,758 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:22,758 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:14 [2019-11-25 08:52:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:22,772 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:22,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124231440] [2019-11-25 08:52:22,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:22,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-25 08:52:22,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824038407] [2019-11-25 08:52:22,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:52:22,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:22,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:52:22,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:22,858 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 6 states. [2019-11-25 08:52:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:23,219 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2019-11-25 08:52:23,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:52:23,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-25 08:52:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:23,220 INFO L225 Difference]: With dead ends: 72 [2019-11-25 08:52:23,220 INFO L226 Difference]: Without dead ends: 72 [2019-11-25 08:52:23,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-25 08:52:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2019-11-25 08:52:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-25 08:52:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2019-11-25 08:52:23,226 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 14 [2019-11-25 08:52:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:23,227 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2019-11-25 08:52:23,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:52:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2019-11-25 08:52:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:52:23,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:23,228 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:23,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:23,431 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:23,431 INFO L82 PathProgramCache]: Analyzing trace with hash -639160544, now seen corresponding path program 1 times [2019-11-25 08:52:23,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:23,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1205195665] [2019-11-25 08:52:23,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:52:23,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:23,595 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_35|], 1=[|v_#valid_65|]} [2019-11-25 08:52:23,601 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:52:23,602 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 [2019-11-25 08:52:23,603 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:23,620 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:23,627 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 [2019-11-25 08:52:23,628 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:23,645 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:23,646 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:23,646 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-25 08:52:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:23,743 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:24,183 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:52:24,188 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:52:24,189 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:24,190 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:24,190 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-25 08:52:24,190 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:24,190 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2019-11-25 08:52:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:24,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205195665] [2019-11-25 08:52:24,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:24,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-25 08:52:24,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105567069] [2019-11-25 08:52:24,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:52:24,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:24,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:52:24,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:24,197 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 10 states. [2019-11-25 08:52:25,156 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-25 08:52:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:25,846 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2019-11-25 08:52:25,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:52:25,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-25 08:52:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:25,849 INFO L225 Difference]: With dead ends: 129 [2019-11-25 08:52:25,849 INFO L226 Difference]: Without dead ends: 129 [2019-11-25 08:52:25,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:52:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-25 08:52:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2019-11-25 08:52:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:52:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2019-11-25 08:52:25,867 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 15 [2019-11-25 08:52:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:25,867 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2019-11-25 08:52:25,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:52:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2019-11-25 08:52:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:52:25,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:25,869 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:26,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:26,080 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:26,080 INFO L82 PathProgramCache]: Analyzing trace with hash 518817702, now seen corresponding path program 1 times [2019-11-25 08:52:26,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:26,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [87452891] [2019-11-25 08:52:26,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:52:26,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:26,290 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:26,299 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-25 08:52:26,300 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:26,302 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:26,302 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:26,302 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-25 08:52:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:26,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [87452891] [2019-11-25 08:52:26,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:26,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-25 08:52:26,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549089842] [2019-11-25 08:52:26,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:52:26,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:52:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:52:26,310 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 5 states. [2019-11-25 08:52:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:26,440 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2019-11-25 08:52:26,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:52:26,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-25 08:52:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:26,442 INFO L225 Difference]: With dead ends: 78 [2019-11-25 08:52:26,442 INFO L226 Difference]: Without dead ends: 78 [2019-11-25 08:52:26,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-25 08:52:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-11-25 08:52:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-25 08:52:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2019-11-25 08:52:26,448 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 17 [2019-11-25 08:52:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:26,448 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2019-11-25 08:52:26,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:52:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2019-11-25 08:52:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:52:26,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:26,449 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:26,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:26,650 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash 518817703, now seen corresponding path program 1 times [2019-11-25 08:52:26,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:26,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [994305639] [2019-11-25 08:52:26,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:52:26,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:26,938 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:27,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-25 08:52:27,173 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2019-11-25 08:52:27,174 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:52:27,190 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2019-11-25 08:52:27,191 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:52:27,206 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2019-11-25 08:52:27,207 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:52:27,266 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:27,267 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-25 08:52:27,268 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:64, output treesize:56 [2019-11-25 08:52:27,493 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2019-11-25 08:52:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:27,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [994305639] [2019-11-25 08:52:27,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:27,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-25 08:52:27,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432860430] [2019-11-25 08:52:27,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:52:27,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:52:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:52:27,565 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 12 states. [2019-11-25 08:52:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:28,278 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2019-11-25 08:52:28,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:52:28,279 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-25 08:52:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:28,282 INFO L225 Difference]: With dead ends: 95 [2019-11-25 08:52:28,282 INFO L226 Difference]: Without dead ends: 95 [2019-11-25 08:52:28,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:52:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-25 08:52:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2019-11-25 08:52:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-25 08:52:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2019-11-25 08:52:28,288 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 17 [2019-11-25 08:52:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:28,288 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2019-11-25 08:52:28,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:52:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2019-11-25 08:52:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:52:28,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:28,289 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:28,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:28,490 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:28,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash 174451850, now seen corresponding path program 1 times [2019-11-25 08:52:28,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:28,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1523334029] [2019-11-25 08:52:28,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:28,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:52:28,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:28,700 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:28,701 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-25 08:52:28,701 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:28,770 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-25 08:52:28,771 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:28,771 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2019-11-25 08:52:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:28,907 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:29,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1523334029] [2019-11-25 08:52:29,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:29,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-25 08:52:29,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086077706] [2019-11-25 08:52:29,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:52:29,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:52:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:52:29,506 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 12 states. [2019-11-25 08:52:30,361 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-11-25 08:52:30,662 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2019-11-25 08:52:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:31,014 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-11-25 08:52:31,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:52:31,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-25 08:52:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:31,015 INFO L225 Difference]: With dead ends: 94 [2019-11-25 08:52:31,016 INFO L226 Difference]: Without dead ends: 94 [2019-11-25 08:52:31,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:52:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-25 08:52:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2019-11-25 08:52:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-25 08:52:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2019-11-25 08:52:31,019 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 17 [2019-11-25 08:52:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:31,020 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2019-11-25 08:52:31,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:52:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2019-11-25 08:52:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:52:31,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:31,021 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] [2019-11-25 08:52:31,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:31,227 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1081487724, now seen corresponding path program 1 times [2019-11-25 08:52:31,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:31,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [345637742] [2019-11-25 08:52:31,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:31,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:52:31,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:31,403 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:52:31,403 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:52:31,403 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:31,408 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:31,409 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:52:31,409 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-25 08:52:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:31,456 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:31,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [345637742] [2019-11-25 08:52:31,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:31,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 5 [2019-11-25 08:52:31,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038024081] [2019-11-25 08:52:31,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:52:31,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:31,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:52:31,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:31,494 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 6 states. [2019-11-25 08:52:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:31,607 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2019-11-25 08:52:31,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:52:31,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-25 08:52:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:31,608 INFO L225 Difference]: With dead ends: 72 [2019-11-25 08:52:31,608 INFO L226 Difference]: Without dead ends: 72 [2019-11-25 08:52:31,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-25 08:52:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-11-25 08:52:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-25 08:52:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2019-11-25 08:52:31,612 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 21 [2019-11-25 08:52:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:31,613 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2019-11-25 08:52:31,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:52:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2019-11-25 08:52:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:52:31,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:31,614 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] [2019-11-25 08:52:31,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:31,815 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:31,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1081487725, now seen corresponding path program 1 times [2019-11-25 08:52:31,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:31,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [743918207] [2019-11-25 08:52:31,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:31,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:52:31,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:32,010 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:32,011 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-25 08:52:32,011 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:32,033 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-25 08:52:32,034 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:32,034 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-25 08:52:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:32,065 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:32,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [743918207] [2019-11-25 08:52:32,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:32,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-25 08:52:32,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122177017] [2019-11-25 08:52:32,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:52:32,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:32,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:52:32,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:32,207 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 10 states. [2019-11-25 08:52:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:32,739 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2019-11-25 08:52:32,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:52:32,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-25 08:52:32,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:32,741 INFO L225 Difference]: With dead ends: 125 [2019-11-25 08:52:32,741 INFO L226 Difference]: Without dead ends: 125 [2019-11-25 08:52:32,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:52:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-25 08:52:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2019-11-25 08:52:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-25 08:52:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2019-11-25 08:52:32,745 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 21 [2019-11-25 08:52:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:32,745 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2019-11-25 08:52:32,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:52:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2019-11-25 08:52:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:52:32,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:32,746 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] [2019-11-25 08:52:32,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:32,947 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:32,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1081496798, now seen corresponding path program 1 times [2019-11-25 08:52:32,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:32,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1602640094] [2019-11-25 08:52:32,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:33,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:52:33,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:33,080 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:33,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1602640094] [2019-11-25 08:52:33,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:33,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-25 08:52:33,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772106424] [2019-11-25 08:52:33,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:52:33,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:33,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:52:33,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:52:33,085 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 3 states. [2019-11-25 08:52:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:33,098 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2019-11-25 08:52:33,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:52:33,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-25 08:52:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:33,100 INFO L225 Difference]: With dead ends: 81 [2019-11-25 08:52:33,100 INFO L226 Difference]: Without dead ends: 81 [2019-11-25 08:52:33,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:52:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-25 08:52:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-25 08:52:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:52:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2019-11-25 08:52:33,103 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 21 [2019-11-25 08:52:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:33,103 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2019-11-25 08:52:33,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:52:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2019-11-25 08:52:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:52:33,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:33,104 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:33,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:33,309 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:33,310 INFO L82 PathProgramCache]: Analyzing trace with hash -488617946, now seen corresponding path program 2 times [2019-11-25 08:52:33,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:33,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1700452732] [2019-11-25 08:52:33,310 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:33,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:52:33,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:33,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-25 08:52:33,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:33,554 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_43|], 1=[|v_#valid_93|]} [2019-11-25 08:52:33,560 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:52:33,562 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 [2019-11-25 08:52:33,563 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:33,597 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:33,605 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 [2019-11-25 08:52:33,605 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:33,624 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:33,625 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:33,625 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-25 08:52:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:33,800 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:34,639 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:52:34,648 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 [2019-11-25 08:52:34,649 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:34,660 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:34,662 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-25 08:52:34,663 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:34,674 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:34,674 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:34,674 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:10 [2019-11-25 08:52:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:34,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1700452732] [2019-11-25 08:52:34,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:34,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2019-11-25 08:52:34,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527492458] [2019-11-25 08:52:34,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:52:34,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:52:34,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:52:34,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:52:34,763 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 15 states. [2019-11-25 08:52:36,788 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-11-25 08:52:39,533 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-25 08:52:40,068 WARN L192 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-25 08:52:42,457 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-25 08:52:42,795 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-11-25 08:52:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:43,631 INFO L93 Difference]: Finished difference Result 212 states and 244 transitions. [2019-11-25 08:52:43,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-25 08:52:43,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-11-25 08:52:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:43,635 INFO L225 Difference]: With dead ends: 212 [2019-11-25 08:52:43,636 INFO L226 Difference]: Without dead ends: 212 [2019-11-25 08:52:43,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:52:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-11-25 08:52:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 121. [2019-11-25 08:52:43,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-25 08:52:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2019-11-25 08:52:43,645 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 23 [2019-11-25 08:52:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:43,645 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2019-11-25 08:52:43,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:52:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2019-11-25 08:52:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-25 08:52:43,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:43,650 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:43,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:43,850 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrcmpErr3REQUIRES_VIOLATION, cstrcmpErr8REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr4REQUIRES_VIOLATION, cstrcmpErr9REQUIRES_VIOLATION, cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr5REQUIRES_VIOLATION, cstrcmpErr7REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-25 08:52:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:43,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2051112526, now seen corresponding path program 1 times [2019-11-25 08:52:43,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:52:43,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1352603338] [2019-11-25 08:52:43,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca5646b2-d995-4890-b754-1885cf311cdf/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 [2019-11-25 08:52:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:44,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:52:44,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:44,047 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2019-11-25 08:52:44,047 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:52:44,052 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:44,052 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:52:44,052 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-25 08:52:44,208 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:52:44,209 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2019-11-25 08:52:44,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-25 08:52:44,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-25 08:52:44,211 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:52:44,235 INFO L567 ElimStorePlain]: treesize reduction 4, result has 86.2 percent of original size [2019-11-25 08:52:44,236 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:52:44,236 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:16 [2019-11-25 08:52:44,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:44,293 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:52:44,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:44,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:44,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:52:44,774 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:152) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-25 08:52:44,777 INFO L168 Benchmark]: Toolchain (without parser) took 29888.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -135.4 MB). Peak memory consumption was 71.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:44,777 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:44,777 INFO L168 Benchmark]: CACSL2BoogieTranslator took 686.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -206.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:44,777 INFO L168 Benchmark]: Boogie Preprocessor took 65.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:44,777 INFO L168 Benchmark]: RCFGBuilder took 806.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:44,778 INFO L168 Benchmark]: TraceAbstraction took 28327.29 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 43.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:44,790 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 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 686.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -206.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 65.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 806.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28327.29 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 43.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...