./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/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 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 22:47:11,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:47:11,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:47:11,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:47:11,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:47:11,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:47:11,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:47:11,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:47:11,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:47:11,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:47:11,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:47:11,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:47:11,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:47:11,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:47:11,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:47:11,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:47:11,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:47:11,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:47:11,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:47:11,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:47:11,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:47:11,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:47:11,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:47:11,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:47:11,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:47:11,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:47:11,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:47:11,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:47:11,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:47:11,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:47:11,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:47:11,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:47:11,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:47:11,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:47:11,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:47:11,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:47:11,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:47:11,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:47:11,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:47:11,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:47:11,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:47:11,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-15 22:47:11,269 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:47:11,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:47:11,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:47:11,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:47:11,272 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:47:11,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:47:11,273 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:47:11,273 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-15 22:47:11,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:47:11,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:47:11,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:47:11,274 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-15 22:47:11,275 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-15 22:47:11,275 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-15 22:47:11,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:47:11,276 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:47:11,276 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:47:11,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:47:11,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:47:11,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:47:11,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:47:11,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:47:11,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:47:11,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:47:11,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:47:11,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:47:11,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6f59e3d5-c16b-448b-9aab-26984566eff4/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 -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2019-11-15 22:47:11,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:47:11,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:47:11,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:47:11,331 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:47:11,331 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:47:11,332 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2019-11-15 22:47:11,396 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/data/7c93e0507/6350ae1100f1425fb4b81b2d1cc496f8/FLAGfc5e4f4fd [2019-11-15 22:47:11,935 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:47:11,936 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2019-11-15 22:47:11,949 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/data/7c93e0507/6350ae1100f1425fb4b81b2d1cc496f8/FLAGfc5e4f4fd [2019-11-15 22:47:12,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/data/7c93e0507/6350ae1100f1425fb4b81b2d1cc496f8 [2019-11-15 22:47:12,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:47:12,263 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-15 22:47:12,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:47:12,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:47:12,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:47:12,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:12,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c12a99e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12, skipping insertion in model container [2019-11-15 22:47:12,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:12,282 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:47:12,323 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:47:12,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:47:12,767 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:47:12,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:47:12,921 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:47:12,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12 WrapperNode [2019-11-15 22:47:12,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:47:12,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:47:12,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:47:12,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:47:12,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:12,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:12,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:12,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:12,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:12,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:13,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (1/1) ... [2019-11-15 22:47:13,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:47:13,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:47:13,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:47:13,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:47:13,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/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 [2019-11-15 22:47:13,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-15 22:47:13,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:47:13,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-15 22:47:13,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-15 22:47:13,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-15 22:47:13,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-15 22:47:13,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-15 22:47:13,093 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrnlen [2019-11-15 22:47:13,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-15 22:47:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-15 22:47:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-15 22:47:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-15 22:47:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-15 22:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-15 22:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-15 22:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-15 22:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-15 22:47:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-15 22:47:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-15 22:47:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-15 22:47:13,096 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-15 22:47:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-15 22:47:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-15 22:47:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-15 22:47:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-15 22:47:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-15 22:47:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-15 22:47:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-15 22:47:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-15 22:47:13,099 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-15 22:47:13,099 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-15 22:47:13,099 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-15 22:47:13,099 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-15 22:47:13,100 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-15 22:47:13,100 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-15 22:47:13,100 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-15 22:47:13,100 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-15 22:47:13,100 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-15 22:47:13,101 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-15 22:47:13,101 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-15 22:47:13,101 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-15 22:47:13,101 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-15 22:47:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-15 22:47:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-15 22:47:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-15 22:47:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-15 22:47:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-15 22:47:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-15 22:47:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-15 22:47:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-15 22:47:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-15 22:47:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-15 22:47:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-15 22:47:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-15 22:47:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-15 22:47:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-15 22:47:13,105 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-15 22:47:13,105 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-15 22:47:13,105 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-15 22:47:13,105 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-15 22:47:13,105 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-15 22:47:13,106 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-15 22:47:13,106 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-15 22:47:13,106 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-15 22:47:13,106 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-15 22:47:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-15 22:47:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-15 22:47:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-15 22:47:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-15 22:47:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-15 22:47:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-15 22:47:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-15 22:47:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-15 22:47:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-15 22:47:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-15 22:47:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-15 22:47:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-15 22:47:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-15 22:47:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-15 22:47:13,110 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-15 22:47:13,110 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-15 22:47:13,110 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-15 22:47:13,110 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-15 22:47:13,110 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-15 22:47:13,111 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-15 22:47:13,111 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-15 22:47:13,111 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-15 22:47:13,111 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-15 22:47:13,112 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-15 22:47:13,112 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-15 22:47:13,112 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-15 22:47:13,112 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-15 22:47:13,112 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-15 22:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-15 22:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-15 22:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-15 22:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-15 22:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-15 22:47:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-15 22:47:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-15 22:47:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-15 22:47:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-15 22:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-15 22:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-15 22:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-15 22:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-15 22:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-15 22:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-15 22:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-15 22:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-15 22:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-15 22:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-15 22:47:13,117 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-15 22:47:13,117 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-15 22:47:13,117 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-15 22:47:13,117 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-15 22:47:13,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-15 22:47:13,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-15 22:47:13,118 INFO L130 BoogieDeclarations]: Found specification of procedure cstrnlen [2019-11-15 22:47:13,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 22:47:13,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-15 22:47:13,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 22:47:13,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 22:47:13,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 22:47:13,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-15 22:47:13,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:47:13,621 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:47:13,622 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-15 22:47:13,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:47:13 BoogieIcfgContainer [2019-11-15 22:47:13,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:47:13,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:47:13,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:47:13,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:47:13,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:47:12" (1/3) ... [2019-11-15 22:47:13,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205e28f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:47:13, skipping insertion in model container [2019-11-15 22:47:13,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:47:12" (2/3) ... [2019-11-15 22:47:13,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205e28f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:47:13, skipping insertion in model container [2019-11-15 22:47:13,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:47:13" (3/3) ... [2019-11-15 22:47:13,634 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2019-11-15 22:47:13,645 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:47:13,653 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-15 22:47:13,665 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-15 22:47:13,687 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:47:13,688 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-15 22:47:13,688 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:47:13,688 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:47:13,688 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:47:13,689 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:47:13,689 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:47:13,689 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:47:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-15 22:47:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:47:13,717 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:13,718 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:13,720 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash 787746653, now seen corresponding path program 1 times [2019-11-15 22:47:13,737 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:13,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450960943] [2019-11-15 22:47:13,737 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:13,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:13,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:13,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450960943] [2019-11-15 22:47:13,939 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:13,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:47:13,940 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862376441] [2019-11-15 22:47:13,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:47:13,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:13,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:47:13,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:47:13,963 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2019-11-15 22:47:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:14,047 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-11-15 22:47:14,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:47:14,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-15 22:47:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:14,060 INFO L225 Difference]: With dead ends: 37 [2019-11-15 22:47:14,060 INFO L226 Difference]: Without dead ends: 34 [2019-11-15 22:47:14,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:47:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-15 22:47:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-15 22:47:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-15 22:47:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-15 22:47:14,102 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2019-11-15 22:47:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:14,103 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-15 22:47:14,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:47:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-15 22:47:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:47:14,104 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:14,104 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:14,105 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash 787746343, now seen corresponding path program 1 times [2019-11-15 22:47:14,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:14,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626773117] [2019-11-15 22:47:14,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:14,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:14,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:14,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626773117] [2019-11-15 22:47:14,207 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:14,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:47:14,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217445466] [2019-11-15 22:47:14,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:47:14,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:47:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:47:14,213 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2019-11-15 22:47:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:14,346 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-15 22:47:14,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:47:14,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-15 22:47:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:14,348 INFO L225 Difference]: With dead ends: 32 [2019-11-15 22:47:14,348 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 22:47:14,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:47:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 22:47:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 22:47:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 22:47:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-15 22:47:14,358 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2019-11-15 22:47:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:14,360 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-15 22:47:14,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:47:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-15 22:47:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:47:14,362 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:14,362 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:14,362 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:14,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:14,363 INFO L82 PathProgramCache]: Analyzing trace with hash 787746344, now seen corresponding path program 1 times [2019-11-15 22:47:14,363 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:14,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987473581] [2019-11-15 22:47:14,363 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:14,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:14,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:14,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987473581] [2019-11-15 22:47:14,499 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:14,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:47:14,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973944277] [2019-11-15 22:47:14,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:47:14,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:14,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:47:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:47:14,501 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2019-11-15 22:47:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:14,612 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-11-15 22:47:14,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:47:14,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-15 22:47:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:14,613 INFO L225 Difference]: With dead ends: 31 [2019-11-15 22:47:14,614 INFO L226 Difference]: Without dead ends: 31 [2019-11-15 22:47:14,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:47:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-15 22:47:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-15 22:47:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 22:47:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-11-15 22:47:14,619 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 11 [2019-11-15 22:47:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:14,620 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-11-15 22:47:14,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:47:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-11-15 22:47:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:47:14,621 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:14,621 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:14,621 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:14,622 INFO L82 PathProgramCache]: Analyzing trace with hash 787746397, now seen corresponding path program 1 times [2019-11-15 22:47:14,622 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:14,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129665939] [2019-11-15 22:47:14,622 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:14,622 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:14,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:14,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129665939] [2019-11-15 22:47:14,732 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:14,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:47:14,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804774001] [2019-11-15 22:47:14,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:47:14,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:14,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:47:14,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:47:14,743 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2019-11-15 22:47:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:14,880 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-11-15 22:47:14,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:47:14,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-15 22:47:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:14,884 INFO L225 Difference]: With dead ends: 39 [2019-11-15 22:47:14,884 INFO L226 Difference]: Without dead ends: 39 [2019-11-15 22:47:14,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:47:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-15 22:47:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2019-11-15 22:47:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-15 22:47:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-11-15 22:47:14,911 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2019-11-15 22:47:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:14,912 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-11-15 22:47:14,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:47:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-11-15 22:47:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:47:14,913 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:14,913 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:14,914 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 789593439, now seen corresponding path program 1 times [2019-11-15 22:47:14,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:14,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707323937] [2019-11-15 22:47:14,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:14,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:14,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:15,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707323937] [2019-11-15 22:47:15,026 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:15,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:47:15,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375894503] [2019-11-15 22:47:15,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:47:15,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:15,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:47:15,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:47:15,028 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2019-11-15 22:47:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:15,187 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-11-15 22:47:15,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:47:15,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-15 22:47:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:15,189 INFO L225 Difference]: With dead ends: 43 [2019-11-15 22:47:15,189 INFO L226 Difference]: Without dead ends: 43 [2019-11-15 22:47:15,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:47:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-15 22:47:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2019-11-15 22:47:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-15 22:47:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-11-15 22:47:15,194 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2019-11-15 22:47:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:15,195 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-11-15 22:47:15,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:47:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-11-15 22:47:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 22:47:15,196 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:15,196 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:15,196 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash 849748688, now seen corresponding path program 1 times [2019-11-15 22:47:15,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:15,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901271345] [2019-11-15 22:47:15,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:15,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:15,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:15,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901271345] [2019-11-15 22:47:15,286 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:15,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:47:15,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737652894] [2019-11-15 22:47:15,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:47:15,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:15,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:47:15,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:47:15,287 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2019-11-15 22:47:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:15,453 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-15 22:47:15,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:47:15,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-15 22:47:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:15,457 INFO L225 Difference]: With dead ends: 35 [2019-11-15 22:47:15,457 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 22:47:15,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:47:15,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 22:47:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-15 22:47:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-15 22:47:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-15 22:47:15,463 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2019-11-15 22:47:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:15,463 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-15 22:47:15,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:47:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-15 22:47:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 22:47:15,465 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:15,465 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:15,469 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash 849748689, now seen corresponding path program 1 times [2019-11-15 22:47:15,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:15,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331949158] [2019-11-15 22:47:15,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:15,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:15,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:15,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331949158] [2019-11-15 22:47:15,643 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:15,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 22:47:15,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133209074] [2019-11-15 22:47:15,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:47:15,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:47:15,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:47:15,645 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2019-11-15 22:47:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:15,899 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-15 22:47:15,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:47:15,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-15 22:47:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:15,903 INFO L225 Difference]: With dead ends: 44 [2019-11-15 22:47:15,903 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 22:47:15,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:47:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 22:47:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-11-15 22:47:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 22:47:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-15 22:47:15,909 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2019-11-15 22:47:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:15,909 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-15 22:47:15,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:47:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-15 22:47:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 22:47:15,910 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:15,911 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:15,911 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2015068958, now seen corresponding path program 1 times [2019-11-15 22:47:15,911 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:15,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862671340] [2019-11-15 22:47:15,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:15,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:15,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:16,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862671340] [2019-11-15 22:47:16,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701907465] [2019-11-15 22:47:16,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:16,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 22:47:16,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:47:16,304 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 22:47:16,305 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:47:16,313 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:16,313 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:47:16,314 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-15 22:47:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:16,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:47:16,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-11-15 22:47:16,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201067931] [2019-11-15 22:47:16,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:47:16,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:47:16,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:47:16,344 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2019-11-15 22:47:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:16,529 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-11-15 22:47:16,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:47:16,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-15 22:47:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:16,531 INFO L225 Difference]: With dead ends: 44 [2019-11-15 22:47:16,532 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 22:47:16,532 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:47:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 22:47:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2019-11-15 22:47:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-15 22:47:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-15 22:47:16,537 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2019-11-15 22:47:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:16,540 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-15 22:47:16,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:47:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-15 22:47:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-15 22:47:16,541 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:16,542 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:16,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:16,751 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1695397446, now seen corresponding path program 1 times [2019-11-15 22:47:16,751 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:16,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143542598] [2019-11-15 22:47:16,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:16,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:16,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:16,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143542598] [2019-11-15 22:47:16,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:16,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:47:16,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952679788] [2019-11-15 22:47:16,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:47:16,815 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:16,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:47:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:47:16,816 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2019-11-15 22:47:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:16,902 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-11-15 22:47:16,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:47:16,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-15 22:47:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:16,903 INFO L225 Difference]: With dead ends: 36 [2019-11-15 22:47:16,903 INFO L226 Difference]: Without dead ends: 36 [2019-11-15 22:47:16,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:47:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-15 22:47:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-15 22:47:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-15 22:47:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-11-15 22:47:16,909 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2019-11-15 22:47:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:16,909 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-11-15 22:47:16,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:47:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-11-15 22:47:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 22:47:16,915 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:16,915 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:16,915 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:16,916 INFO L82 PathProgramCache]: Analyzing trace with hash 964873536, now seen corresponding path program 1 times [2019-11-15 22:47:16,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:16,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606589415] [2019-11-15 22:47:16,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:16,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:16,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:17,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606589415] [2019-11-15 22:47:17,069 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:17,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 22:47:17,069 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457287311] [2019-11-15 22:47:17,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:47:17,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:17,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:47:17,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:47:17,071 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2019-11-15 22:47:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:17,312 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2019-11-15 22:47:17,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 22:47:17,312 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-15 22:47:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:17,314 INFO L225 Difference]: With dead ends: 58 [2019-11-15 22:47:17,314 INFO L226 Difference]: Without dead ends: 58 [2019-11-15 22:47:17,314 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:47:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-15 22:47:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2019-11-15 22:47:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-15 22:47:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-11-15 22:47:17,328 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 21 [2019-11-15 22:47:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:17,329 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-11-15 22:47:17,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:47:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-11-15 22:47:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 22:47:17,331 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:17,332 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:17,332 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:17,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:17,332 INFO L82 PathProgramCache]: Analyzing trace with hash -46243714, now seen corresponding path program 1 times [2019-11-15 22:47:17,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:17,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645979584] [2019-11-15 22:47:17,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:17,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:17,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:17,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645979584] [2019-11-15 22:47:17,481 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:17,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-15 22:47:17,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106637785] [2019-11-15 22:47:17,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:47:17,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:47:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:47:17,483 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-11-15 22:47:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:17,703 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2019-11-15 22:47:17,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 22:47:17,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-15 22:47:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:17,704 INFO L225 Difference]: With dead ends: 55 [2019-11-15 22:47:17,704 INFO L226 Difference]: Without dead ends: 51 [2019-11-15 22:47:17,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-11-15 22:47:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-15 22:47:17,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2019-11-15 22:47:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-15 22:47:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-15 22:47:17,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2019-11-15 22:47:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:17,710 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-15 22:47:17,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:47:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-15 22:47:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 22:47:17,711 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:17,712 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:17,712 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1827219927, now seen corresponding path program 1 times [2019-11-15 22:47:17,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:17,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277068906] [2019-11-15 22:47:17,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:17,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:17,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:17,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277068906] [2019-11-15 22:47:17,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400020024] [2019-11-15 22:47:17,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:18,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-15 22:47:18,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:47:18,026 INFO L375 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 11 treesize of output 7 [2019-11-15 22:47:18,026 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:47:18,030 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:18,030 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:47:18,031 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-15 22:47:18,108 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-15 22:47:18,109 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:47:18,111 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:18,111 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:47:18,112 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:47:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:18,132 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:47:18,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2019-11-15 22:47:18,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951049736] [2019-11-15 22:47:18,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:47:18,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:18,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:47:18,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-11-15 22:47:18,134 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2019-11-15 22:47:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:18,320 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-11-15 22:47:18,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 22:47:18,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-15 22:47:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:18,321 INFO L225 Difference]: With dead ends: 50 [2019-11-15 22:47:18,321 INFO L226 Difference]: Without dead ends: 50 [2019-11-15 22:47:18,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-11-15 22:47:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-15 22:47:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-11-15 22:47:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-15 22:47:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-11-15 22:47:18,327 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 22 [2019-11-15 22:47:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:18,327 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-11-15 22:47:18,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:47:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-11-15 22:47:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 22:47:18,328 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:18,329 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:18,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:18,533 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:18,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1446679015, now seen corresponding path program 1 times [2019-11-15 22:47:18,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:18,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449452728] [2019-11-15 22:47:18,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:18,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:18,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:18,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449452728] [2019-11-15 22:47:18,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583880379] [2019-11-15 22:47:18,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:18,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 22:47:18,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:47:18,867 INFO L375 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 14 treesize of output 10 [2019-11-15 22:47:18,868 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:47:18,876 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:18,877 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:47:18,877 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:47:18,975 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:18,975 INFO L375 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 18 treesize of output 18 [2019-11-15 22:47:18,976 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:47:18,999 INFO L567 ElimStorePlain]: treesize reduction 8, result has 55.6 percent of original size [2019-11-15 22:47:19,000 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:47:19,001 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2019-11-15 22:47:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:19,030 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:47:19,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 15 [2019-11-15 22:47:19,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972498727] [2019-11-15 22:47:19,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 22:47:19,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 22:47:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:47:19,032 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 10 states. [2019-11-15 22:47:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:19,324 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-11-15 22:47:19,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 22:47:19,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-15 22:47:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:19,325 INFO L225 Difference]: With dead ends: 65 [2019-11-15 22:47:19,325 INFO L226 Difference]: Without dead ends: 65 [2019-11-15 22:47:19,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-11-15 22:47:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-15 22:47:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2019-11-15 22:47:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-15 22:47:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2019-11-15 22:47:19,332 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2019-11-15 22:47:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:19,332 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2019-11-15 22:47:19,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 22:47:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2019-11-15 22:47:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 22:47:19,334 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:19,334 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:19,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:19,543 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:19,544 INFO L82 PathProgramCache]: Analyzing trace with hash -862082627, now seen corresponding path program 1 times [2019-11-15 22:47:19,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:19,544 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406704002] [2019-11-15 22:47:19,544 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:19,544 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:19,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:19,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406704002] [2019-11-15 22:47:19,621 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:47:19,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:47:19,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919369482] [2019-11-15 22:47:19,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:47:19,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:19,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:47:19,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:47:19,623 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 5 states. [2019-11-15 22:47:19,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:19,689 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-15 22:47:19,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:47:19,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-15 22:47:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:19,690 INFO L225 Difference]: With dead ends: 47 [2019-11-15 22:47:19,691 INFO L226 Difference]: Without dead ends: 27 [2019-11-15 22:47:19,691 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:47:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-15 22:47:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-15 22:47:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-15 22:47:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-15 22:47:19,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2019-11-15 22:47:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:19,694 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-15 22:47:19,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:47:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-15 22:47:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-15 22:47:19,695 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:19,696 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:19,696 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:19,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1736404348, now seen corresponding path program 1 times [2019-11-15 22:47:19,696 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:19,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769968151] [2019-11-15 22:47:19,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:19,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:19,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:19,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769968151] [2019-11-15 22:47:19,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922136736] [2019-11-15 22:47:19,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:19,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-15 22:47:19,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:47:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:20,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:47:20,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-15 22:47:20,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642339198] [2019-11-15 22:47:20,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 22:47:20,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 22:47:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-15 22:47:20,176 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 16 states. [2019-11-15 22:47:20,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:20,570 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-15 22:47:20,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 22:47:20,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-11-15 22:47:20,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:20,571 INFO L225 Difference]: With dead ends: 36 [2019-11-15 22:47:20,572 INFO L226 Difference]: Without dead ends: 36 [2019-11-15 22:47:20,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-11-15 22:47:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-15 22:47:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-15 22:47:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-15 22:47:20,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-15 22:47:20,576 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2019-11-15 22:47:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:20,576 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-15 22:47:20,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 22:47:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-15 22:47:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-15 22:47:20,578 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:20,578 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:20,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:20,779 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2115859356, now seen corresponding path program 2 times [2019-11-15 22:47:20,779 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:20,779 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536672958] [2019-11-15 22:47:20,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:20,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:20,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:47:20,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536672958] [2019-11-15 22:47:20,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137558208] [2019-11-15 22:47:20,942 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:21,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:47:21,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:47:21,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-15 22:47:21,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:47:21,210 INFO L375 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 14 treesize of output 10 [2019-11-15 22:47:21,210 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:47:21,226 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:21,227 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:47:21,227 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-11-15 22:47:21,403 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:21,404 INFO L375 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 18 treesize of output 18 [2019-11-15 22:47:21,404 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:47:21,427 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:21,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:47:21,432 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:47:21,432 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2019-11-15 22:47:21,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:47:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:21,600 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:47:21,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-11-15 22:47:21,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106461917] [2019-11-15 22:47:21,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-15 22:47:21,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:21,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-15 22:47:21,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-11-15 22:47:21,602 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 18 states. [2019-11-15 22:47:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:22,836 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-15 22:47:22,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-15 22:47:22,837 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2019-11-15 22:47:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:22,838 INFO L225 Difference]: With dead ends: 59 [2019-11-15 22:47:22,838 INFO L226 Difference]: Without dead ends: 42 [2019-11-15 22:47:22,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2019-11-15 22:47:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-15 22:47:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-11-15 22:47:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-15 22:47:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-11-15 22:47:22,847 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2019-11-15 22:47:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:22,847 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-11-15 22:47:22,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-15 22:47:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-11-15 22:47:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-15 22:47:22,848 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:22,849 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:23,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:23,053 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash 942977846, now seen corresponding path program 1 times [2019-11-15 22:47:23,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:23,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152008157] [2019-11-15 22:47:23,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:23,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:23,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:23,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152008157] [2019-11-15 22:47:23,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937756465] [2019-11-15 22:47:23,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:23,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 22:47:23,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:47:23,338 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 22:47:23,338 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:47:23,344 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:23,344 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:47:23,345 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-15 22:47:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:23,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:47:23,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-11-15 22:47:23,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849956662] [2019-11-15 22:47:23,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 22:47:23,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:23,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 22:47:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2019-11-15 22:47:23,561 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 19 states. [2019-11-15 22:47:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:23,908 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2019-11-15 22:47:23,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 22:47:23,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2019-11-15 22:47:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:23,910 INFO L225 Difference]: With dead ends: 64 [2019-11-15 22:47:23,910 INFO L226 Difference]: Without dead ends: 46 [2019-11-15 22:47:23,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-11-15 22:47:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-15 22:47:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2019-11-15 22:47:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-15 22:47:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-11-15 22:47:23,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2019-11-15 22:47:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:23,914 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-11-15 22:47:23,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 22:47:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-11-15 22:47:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-15 22:47:23,916 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:23,916 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:24,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:24,117 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:24,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1250412755, now seen corresponding path program 2 times [2019-11-15 22:47:24,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:24,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165425287] [2019-11-15 22:47:24,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:24,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:24,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:24,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165425287] [2019-11-15 22:47:24,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171315945] [2019-11-15 22:47:24,504 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:24,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:47:24,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:47:24,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-15 22:47:24,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:47:24,712 INFO L375 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 14 treesize of output 10 [2019-11-15 22:47:24,712 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:47:24,728 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:24,729 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:47:24,729 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-11-15 22:47:25,036 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:25,037 INFO L375 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 18 treesize of output 18 [2019-11-15 22:47:25,038 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:47:25,058 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:47:25,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:47:25,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:47:25,061 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2019-11-15 22:47:25,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:47:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:25,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:47:25,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2019-11-15 22:47:25,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303635666] [2019-11-15 22:47:25,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-15 22:47:25,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:47:25,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-15 22:47:25,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2019-11-15 22:47:25,263 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 27 states. [2019-11-15 22:47:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:47:29,439 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2019-11-15 22:47:29,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-15 22:47:29,441 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2019-11-15 22:47:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:47:29,442 INFO L225 Difference]: With dead ends: 79 [2019-11-15 22:47:29,442 INFO L226 Difference]: Without dead ends: 59 [2019-11-15 22:47:29,443 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2019-11-15 22:47:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-15 22:47:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2019-11-15 22:47:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-15 22:47:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-15 22:47:29,447 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 42 [2019-11-15 22:47:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:47:29,448 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-15 22:47:29,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-15 22:47:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-15 22:47:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-15 22:47:29,450 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:47:29,450 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:47:29,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:47:29,654 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:47:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:47:29,655 INFO L82 PathProgramCache]: Analyzing trace with hash -873535480, now seen corresponding path program 3 times [2019-11-15 22:47:29,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:47:29,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001779000] [2019-11-15 22:47:29,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:29,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:47:29,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:47:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:47:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:47:30,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001779000] [2019-11-15 22:47:30,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253269924] [2019-11-15 22:47:30,111 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:48:34,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-15 22:48:34,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:48:34,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-15 22:48:34,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:48:34,335 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 22:48:34,335 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:48:34,364 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:34,364 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:34,364 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-15 22:48:34,466 INFO L375 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 16 treesize of output 12 [2019-11-15 22:48:34,466 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:48:34,478 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:34,478 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:34,478 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-15 22:48:34,865 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:34,865 INFO L375 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 20 treesize of output 20 [2019-11-15 22:48:34,866 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:48:34,884 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:34,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:48:34,886 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:34,886 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:37 [2019-11-15 22:48:34,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:48:34,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:48:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:48:35,211 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:48:35,211 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2019-11-15 22:48:35,211 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674478279] [2019-11-15 22:48:35,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-15 22:48:35,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:48:35,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-15 22:48:35,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2019-11-15 22:48:35,214 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 31 states. [2019-11-15 22:48:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:48:37,597 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2019-11-15 22:48:37,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-15 22:48:37,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 52 [2019-11-15 22:48:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:48:37,598 INFO L225 Difference]: With dead ends: 95 [2019-11-15 22:48:37,598 INFO L226 Difference]: Without dead ends: 69 [2019-11-15 22:48:37,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2019-11-15 22:48:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-15 22:48:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-11-15 22:48:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-15 22:48:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-11-15 22:48:37,603 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 52 [2019-11-15 22:48:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:48:37,603 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-11-15 22:48:37,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-15 22:48:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-11-15 22:48:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-15 22:48:37,605 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:48:37,605 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:48:37,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:48:37,813 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:48:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:48:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1875657923, now seen corresponding path program 4 times [2019-11-15 22:48:37,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:48:37,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119158716] [2019-11-15 22:48:37,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:48:37,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:48:37,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:48:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:48:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:48:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:48:38,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119158716] [2019-11-15 22:48:38,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395329397] [2019-11-15 22:48:38,327 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:48:38,479 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:48:38,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:48:38,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-15 22:48:38,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:48:38,511 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 22:48:38,511 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:48:38,518 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:38,518 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:38,519 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-15 22:48:38,809 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-15 22:48:38,809 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:48:38,815 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:38,815 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:38,815 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-15 22:48:39,207 INFO L375 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 24 treesize of output 18 [2019-11-15 22:48:39,208 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:48:39,216 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:39,220 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:48:39,221 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:39,222 INFO L375 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 17 treesize of output 10 [2019-11-15 22:48:39,222 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:48:39,228 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:39,229 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:39,229 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-11-15 22:48:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:48:39,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:48:39,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2019-11-15 22:48:39,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411156255] [2019-11-15 22:48:39,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-15 22:48:39,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:48:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-15 22:48:39,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 22:48:39,245 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 33 states. [2019-11-15 22:48:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:48:40,696 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2019-11-15 22:48:40,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 22:48:40,697 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2019-11-15 22:48:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:48:40,697 INFO L225 Difference]: With dead ends: 102 [2019-11-15 22:48:40,697 INFO L226 Difference]: Without dead ends: 70 [2019-11-15 22:48:40,698 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=237, Invalid=2115, Unknown=0, NotChecked=0, Total=2352 [2019-11-15 22:48:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-15 22:48:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2019-11-15 22:48:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-15 22:48:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2019-11-15 22:48:40,701 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2019-11-15 22:48:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:48:40,702 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2019-11-15 22:48:40,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-15 22:48:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2019-11-15 22:48:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-15 22:48:40,703 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:48:40,704 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:48:40,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:48:40,907 INFO L410 AbstractCegarLoop]: === Iteration 21 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:48:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:48:40,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1586034214, now seen corresponding path program 5 times [2019-11-15 22:48:40,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:48:40,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127620276] [2019-11-15 22:48:40,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:48:40,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:48:40,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:48:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:48:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:48:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:48:41,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127620276] [2019-11-15 22:48:41,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391435958] [2019-11-15 22:48:41,211 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:48:41,362 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 22:48:41,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:48:41,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-15 22:48:41,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:48:41,377 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 22:48:41,377 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:48:41,382 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:41,382 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:41,382 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-15 22:48:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:48:41,711 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:48:41,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2019-11-15 22:48:41,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735398927] [2019-11-15 22:48:41,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-15 22:48:41,712 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:48:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-15 22:48:41,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2019-11-15 22:48:41,713 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 31 states. [2019-11-15 22:48:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:48:42,350 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2019-11-15 22:48:42,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-15 22:48:42,350 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2019-11-15 22:48:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:48:42,351 INFO L225 Difference]: With dead ends: 76 [2019-11-15 22:48:42,351 INFO L226 Difference]: Without dead ends: 76 [2019-11-15 22:48:42,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2019-11-15 22:48:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-15 22:48:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-11-15 22:48:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-15 22:48:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2019-11-15 22:48:42,354 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 66 [2019-11-15 22:48:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:48:42,355 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2019-11-15 22:48:42,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-15 22:48:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2019-11-15 22:48:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-15 22:48:42,356 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:48:42,356 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:48:42,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:48:42,560 INFO L410 AbstractCegarLoop]: === Iteration 22 === [cstrnlenErr1REQUIRES_VIOLATION, cstrnlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-11-15 22:48:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:48:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1098289778, now seen corresponding path program 6 times [2019-11-15 22:48:42,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:48:42,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225108810] [2019-11-15 22:48:42,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:48:42,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:48:42,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:48:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:48:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:48:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:48:43,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225108810] [2019-11-15 22:48:43,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441808183] [2019-11-15 22:48:43,149 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:48:43,317 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-15 22:48:43,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:48:43,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-15 22:48:43,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:48:43,332 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 22:48:43,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:48:43,337 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:43,337 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:43,337 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-15 22:48:43,372 INFO L375 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 16 treesize of output 12 [2019-11-15 22:48:43,372 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:48:43,378 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:43,378 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:48:43,379 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2019-11-15 22:48:43,538 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:43,539 INFO L375 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 20 treesize of output 20 [2019-11-15 22:48:43,539 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:48:43,557 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:48:43,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:48:43,558 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:48:43,558 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2019-11-15 22:48:43,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:48:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-15 22:48:43,763 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:48:43,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2019-11-15 22:48:43,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451522756] [2019-11-15 22:48:43,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-15 22:48:43,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:48:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-15 22:48:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2019-11-15 22:48:43,765 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 29 states. [2019-11-15 22:48:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:48:47,351 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2019-11-15 22:48:47,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-15 22:48:47,352 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2019-11-15 22:48:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:48:47,352 INFO L225 Difference]: With dead ends: 117 [2019-11-15 22:48:47,352 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 22:48:47,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=603, Invalid=4509, Unknown=0, NotChecked=0, Total=5112 [2019-11-15 22:48:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 22:48:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 22:48:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 22:48:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 22:48:47,355 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2019-11-15 22:48:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:48:47,355 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 22:48:47,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-15 22:48:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 22:48:47,356 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 22:48:47,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:48:47,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:48:47 BoogieIcfgContainer [2019-11-15 22:48:47,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:48:47,561 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:48:47,561 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:48:47,561 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:48:47,562 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:47:13" (3/4) ... [2019-11-15 22:48:47,564 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 22:48:47,570 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-15 22:48:47,570 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-11-15 22:48:47,571 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrnlen [2019-11-15 22:48:47,571 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-11-15 22:48:47,571 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-11-15 22:48:47,572 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-11-15 22:48:47,572 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-15 22:48:47,572 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-11-15 22:48:47,577 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2019-11-15 22:48:47,577 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-11-15 22:48:47,577 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-15 22:48:47,623 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6f59e3d5-c16b-448b-9aab-26984566eff4/bin/uautomizer/witness.graphml [2019-11-15 22:48:47,623 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:48:47,625 INFO L168 Benchmark]: Toolchain (without parser) took 95361.61 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 435.2 MB). Free memory was 944.7 MB in the beginning and 826.2 MB in the end (delta: 118.5 MB). Peak memory consumption was 553.6 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:47,625 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:48:47,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 657.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -158.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:47,626 INFO L168 Benchmark]: Boogie Preprocessor took 84.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:48:47,627 INFO L168 Benchmark]: RCFGBuilder took 615.32 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: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:47,627 INFO L168 Benchmark]: TraceAbstraction took 93936.50 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 307.2 MB). Free memory was 1.1 GB in the beginning and 843.3 MB in the end (delta: 210.7 MB). Peak memory consumption was 517.9 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:47,628 INFO L168 Benchmark]: Witness Printer took 62.47 ms. Allocated memory is still 1.5 GB. Free memory was 843.3 MB in the beginning and 826.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-15 22:48:47,630 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 657.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -158.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 84.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 615.32 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: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 93936.50 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 307.2 MB). Free memory was 1.1 GB in the beginning and 843.3 MB in the end (delta: 210.7 MB). Peak memory consumption was 517.9 MB. Max. memory is 11.5 GB. * Witness Printer took 62.47 ms. Allocated memory is still 1.5 GB. Free memory was 843.3 MB in the beginning and 826.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 7 error locations. Result: SAFE, OverallTime: 93.8s, OverallIterations: 22, TraceHistogramMax: 7, AutomataDifference: 16.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 569 SDtfs, 1473 SDslu, 1488 SDs, 0 SdLazy, 6670 SolverSat, 286 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 835 GetRequests, 399 SyntacticMatches, 9 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 14.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 98 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 64.8s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 1070 NumberOfCodeBlocks, 1059 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 1037 ConstructedInterpolants, 90 QuantifiedInterpolants, 440299 SizeOfPredicates, 92 NumberOfNonLiveVariables, 1570 ConjunctsInSsa, 308 ConjunctsInUnsatCore, 33 InterpolantComputations, 13 PerfectInterpolantSequences, 389/1052 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...