./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 15:09:36,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:09:36,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:09:36,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:09:36,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:09:36,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:09:36,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:09:36,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:09:36,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:09:36,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:09:36,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:09:36,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:09:36,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:09:36,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:09:36,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:09:36,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:09:36,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:09:36,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:09:36,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:09:36,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:09:36,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:09:36,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:09:36,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:09:36,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:09:36,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:09:36,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:09:36,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:09:36,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:09:36,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:09:36,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:09:36,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:09:36,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:09:36,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:09:36,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:09:36,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:09:36,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:09:36,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:09:36,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:09:36,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:09:36,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:09:36,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:09:36,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-12-07 15:09:36,725 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:09:36,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:09:36,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 15:09:36,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 15:09:36,726 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 15:09:36,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:09:36,726 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 15:09:36,726 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 15:09:36,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:09:36,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 15:09:36,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:09:36,727 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 15:09:36,727 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 15:09:36,727 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 15:09:36,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:09:36,727 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 15:09:36,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 15:09:36,728 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:09:36,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:09:36,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 15:09:36,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:09:36,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:09:36,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:09:36,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:09:36,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:09:36,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 15:09:36,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:09:36,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:09:36,729 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_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 -> 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf [2019-12-07 15:09:36,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:09:36,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:09:36,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:09:36,837 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:09:36,838 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:09:36,838 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2019-12-07 15:09:36,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/data/31f71d2e7/3c92c5fdddb34a93adc6a459b7bba30e/FLAGdeb74d8ad [2019-12-07 15:09:37,334 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:09:37,335 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2019-12-07 15:09:37,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/data/31f71d2e7/3c92c5fdddb34a93adc6a459b7bba30e/FLAGdeb74d8ad [2019-12-07 15:09:37,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/data/31f71d2e7/3c92c5fdddb34a93adc6a459b7bba30e [2019-12-07 15:09:37,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:09:37,863 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 15:09:37,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:09:37,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:09:37,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:09:37,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:09:37" (1/1) ... [2019-12-07 15:09:37,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a25c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:37, skipping insertion in model container [2019-12-07 15:09:37,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:09:37" (1/1) ... [2019-12-07 15:09:37,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:09:37,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:09:38,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:09:38,136 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:09:38,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:09:38,200 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:09:38,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38 WrapperNode [2019-12-07 15:09:38,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:09:38,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:09:38,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:09:38,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:09:38,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (1/1) ... [2019-12-07 15:09:38,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (1/1) ... [2019-12-07 15:09:38,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (1/1) ... [2019-12-07 15:09:38,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (1/1) ... [2019-12-07 15:09:38,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (1/1) ... [2019-12-07 15:09:38,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (1/1) ... [2019-12-07 15:09:38,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (1/1) ... [2019-12-07 15:09:38,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:09:38,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:09:38,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:09:38,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:09:38,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:09:38,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 15:09:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:09:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-12-07 15:09:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-12-07 15:09:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-12-07 15:09:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-12-07 15:09:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-12-07 15:09:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure strlen_rec [2019-12-07 15:09:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 15:09:38,276 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-12-07 15:09:38,276 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-12-07 15:09:38,277 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-12-07 15:09:38,278 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-12-07 15:09:38,279 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-12-07 15:09:38,280 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-12-07 15:09:38,281 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-12-07 15:09:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-12-07 15:09:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-12-07 15:09:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-12-07 15:09:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-12-07 15:09:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-12-07 15:09:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-12-07 15:09:38,282 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-12-07 15:09:38,283 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-12-07 15:09:38,283 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-12-07 15:09:38,283 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-12-07 15:09:38,283 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-12-07 15:09:38,283 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-12-07 15:09:38,283 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-12-07 15:09:38,283 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-12-07 15:09:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-12-07 15:09:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-12-07 15:09:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-12-07 15:09:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-12-07 15:09:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-12-07 15:09:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-12-07 15:09:38,284 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-12-07 15:09:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-12-07 15:09:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-12-07 15:09:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-12-07 15:09:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-12-07 15:09:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-12-07 15:09:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-12-07 15:09:38,285 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-12-07 15:09:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-12-07 15:09:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-12-07 15:09:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-12-07 15:09:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-12-07 15:09:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-12-07 15:09:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-12-07 15:09:38,286 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-12-07 15:09:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure strlen_rec [2019-12-07 15:09:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 15:09:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 15:09:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 15:09:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 15:09:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 15:09:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 15:09:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:09:38,519 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:09:38,519 INFO L287 CfgBuilder]: Removed 1 assume(true) statements. [2019-12-07 15:09:38,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:09:38 BoogieIcfgContainer [2019-12-07 15:09:38,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:09:38,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:09:38,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:09:38,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:09:38,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:09:37" (1/3) ... [2019-12-07 15:09:38,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33943691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:09:38, skipping insertion in model container [2019-12-07 15:09:38,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:09:38" (2/3) ... [2019-12-07 15:09:38,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33943691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:09:38, skipping insertion in model container [2019-12-07 15:09:38,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:09:38" (3/3) ... [2019-12-07 15:09:38,525 INFO L109 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca-1.i [2019-12-07 15:09:38,531 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:09:38,536 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-12-07 15:09:38,543 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-12-07 15:09:38,555 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:09:38,556 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 15:09:38,556 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:09:38,556 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:09:38,556 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:09:38,556 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:09:38,556 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:09:38,556 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:09:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-12-07 15:09:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 15:09:38,571 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:38,571 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:38,572 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:38,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754822, now seen corresponding path program 1 times [2019-12-07 15:09:38,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:38,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611055362] [2019-12-07 15:09:38,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:38,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611055362] [2019-12-07 15:09:38,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:38,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 15:09:38,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156501852] [2019-12-07 15:09:38,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:09:38,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:38,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:09:38,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:09:38,714 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-12-07 15:09:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:38,781 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2019-12-07 15:09:38,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:09:38,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 15:09:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:38,788 INFO L225 Difference]: With dead ends: 31 [2019-12-07 15:09:38,788 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 15:09:38,789 INFO L630 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 [2019-12-07 15:09:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 15:09:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 15:09:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 15:09:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-12-07 15:09:38,813 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 10 [2019-12-07 15:09:38,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:38,813 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-12-07 15:09:38,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:09:38,813 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-12-07 15:09:38,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 15:09:38,813 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:38,813 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:38,814 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:38,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:38,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754821, now seen corresponding path program 1 times [2019-12-07 15:09:38,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:38,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122708934] [2019-12-07 15:09:38,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:38,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122708934] [2019-12-07 15:09:38,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:38,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 15:09:38,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013687915] [2019-12-07 15:09:38,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:09:38,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:09:38,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:09:38,867 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2019-12-07 15:09:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:38,919 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-12-07 15:09:38,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:09:38,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 15:09:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:38,920 INFO L225 Difference]: With dead ends: 27 [2019-12-07 15:09:38,920 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 15:09:38,921 INFO L630 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 [2019-12-07 15:09:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 15:09:38,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-12-07 15:09:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 15:09:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-12-07 15:09:38,924 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2019-12-07 15:09:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:38,924 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-12-07 15:09:38,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:09:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-12-07 15:09:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 15:09:38,924 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:38,925 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:38,925 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:38,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754768, now seen corresponding path program 1 times [2019-12-07 15:09:38,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:38,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667486963] [2019-12-07 15:09:38,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:38,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667486963] [2019-12-07 15:09:38,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:38,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 15:09:38,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827164119] [2019-12-07 15:09:38,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:09:38,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:38,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:09:38,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:09:38,973 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2019-12-07 15:09:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:39,023 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-12-07 15:09:39,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:09:39,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 15:09:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:39,024 INFO L225 Difference]: With dead ends: 34 [2019-12-07 15:09:39,024 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 15:09:39,025 INFO L630 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 [2019-12-07 15:09:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 15:09:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-12-07 15:09:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 15:09:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-12-07 15:09:39,030 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 10 [2019-12-07 15:09:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:39,030 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-12-07 15:09:39,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:09:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-12-07 15:09:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 15:09:39,031 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:39,031 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:39,031 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2117695186, now seen corresponding path program 1 times [2019-12-07 15:09:39,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:39,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922307878] [2019-12-07 15:09:39,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:39,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922307878] [2019-12-07 15:09:39,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:39,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 15:09:39,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834479502] [2019-12-07 15:09:39,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:09:39,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:39,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:09:39,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:09:39,079 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2019-12-07 15:09:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:39,153 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-12-07 15:09:39,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:09:39,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 15:09:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:39,155 INFO L225 Difference]: With dead ends: 38 [2019-12-07 15:09:39,155 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 15:09:39,155 INFO L630 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 [2019-12-07 15:09:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 15:09:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-12-07 15:09:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 15:09:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-12-07 15:09:39,159 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 10 [2019-12-07 15:09:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:39,159 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-12-07 15:09:39,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:09:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-12-07 15:09:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 15:09:39,160 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:39,160 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:39,160 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:39,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:39,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1259263901, now seen corresponding path program 1 times [2019-12-07 15:09:39,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:39,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636560250] [2019-12-07 15:09:39,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:39,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636560250] [2019-12-07 15:09:39,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:39,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 15:09:39,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532447202] [2019-12-07 15:09:39,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 15:09:39,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 15:09:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 15:09:39,205 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-12-07 15:09:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:39,271 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-12-07 15:09:39,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 15:09:39,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-12-07 15:09:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:39,272 INFO L225 Difference]: With dead ends: 30 [2019-12-07 15:09:39,272 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 15:09:39,273 INFO L630 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 [2019-12-07 15:09:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 15:09:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-07 15:09:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 15:09:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-12-07 15:09:39,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 13 [2019-12-07 15:09:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:39,276 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-12-07 15:09:39,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 15:09:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-12-07 15:09:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 15:09:39,276 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:39,276 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:39,276 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1259263900, now seen corresponding path program 1 times [2019-12-07 15:09:39,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:39,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282288294] [2019-12-07 15:09:39,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:39,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282288294] [2019-12-07 15:09:39,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:39,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 15:09:39,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274215723] [2019-12-07 15:09:39,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 15:09:39,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:39,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 15:09:39,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 15:09:39,343 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2019-12-07 15:09:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:39,445 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-12-07 15:09:39,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 15:09:39,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-07 15:09:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:39,446 INFO L225 Difference]: With dead ends: 37 [2019-12-07 15:09:39,446 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 15:09:39,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:09:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 15:09:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-12-07 15:09:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 15:09:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-12-07 15:09:39,451 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2019-12-07 15:09:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:39,451 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-12-07 15:09:39,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 15:09:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-12-07 15:09:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 15:09:39,452 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:39,452 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:39,452 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:39,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1143813903, now seen corresponding path program 1 times [2019-12-07 15:09:39,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:39,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014735626] [2019-12-07 15:09:39,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:39,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014735626] [2019-12-07 15:09:39,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654416919] [2019-12-07 15:09:39,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:09:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:39,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 15:09:39,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:09:39,628 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 15:09:39,629 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:39,635 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:39,635 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:09:39,636 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 15:09:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:39,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:09:39,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-12-07 15:09:39,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184148786] [2019-12-07 15:09:39,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 15:09:39,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:39,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:09:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 15:09:39,649 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2019-12-07 15:09:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:39,732 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-12-07 15:09:39,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 15:09:39,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-12-07 15:09:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:39,733 INFO L225 Difference]: With dead ends: 43 [2019-12-07 15:09:39,733 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 15:09:39,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-12-07 15:09:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 15:09:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-12-07 15:09:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 15:09:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-12-07 15:09:39,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2019-12-07 15:09:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:39,737 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-12-07 15:09:39,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 15:09:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-12-07 15:09:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 15:09:39,738 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:39,738 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:39,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:09:39,940 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash 228211982, now seen corresponding path program 1 times [2019-12-07 15:09:39,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:39,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690802447] [2019-12-07 15:09:39,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:40,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690802447] [2019-12-07 15:09:40,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:40,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-12-07 15:09:40,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314554549] [2019-12-07 15:09:40,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 15:09:40,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:40,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 15:09:40,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-12-07 15:09:40,064 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-12-07 15:09:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:40,177 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-12-07 15:09:40,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 15:09:40,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-12-07 15:09:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:40,178 INFO L225 Difference]: With dead ends: 44 [2019-12-07 15:09:40,178 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 15:09:40,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-07 15:09:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 15:09:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-12-07 15:09:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 15:09:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-12-07 15:09:40,181 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 17 [2019-12-07 15:09:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:40,181 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-12-07 15:09:40,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 15:09:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-12-07 15:09:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 15:09:40,182 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:40,182 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:40,182 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:40,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:40,182 INFO L82 PathProgramCache]: Analyzing trace with hash 929276560, now seen corresponding path program 1 times [2019-12-07 15:09:40,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:40,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599504941] [2019-12-07 15:09:40,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:40,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599504941] [2019-12-07 15:09:40,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:40,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-12-07 15:09:40,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569359583] [2019-12-07 15:09:40,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 15:09:40,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 15:09:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-12-07 15:09:40,267 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 10 states. [2019-12-07 15:09:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:40,417 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2019-12-07 15:09:40,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 15:09:40,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-12-07 15:09:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:40,419 INFO L225 Difference]: With dead ends: 55 [2019-12-07 15:09:40,419 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 15:09:40,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-12-07 15:09:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 15:09:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2019-12-07 15:09:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 15:09:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2019-12-07 15:09:40,422 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 17 [2019-12-07 15:09:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:40,423 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2019-12-07 15:09:40,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 15:09:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2019-12-07 15:09:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 15:09:40,423 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:40,423 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:40,423 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1516451273, now seen corresponding path program 1 times [2019-12-07 15:09:40,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:40,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351414430] [2019-12-07 15:09:40,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:40,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351414430] [2019-12-07 15:09:40,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:09:40,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 15:09:40,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123935529] [2019-12-07 15:09:40,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:09:40,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:40,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:09:40,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:09:40,460 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 5 states. [2019-12-07 15:09:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:40,493 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-12-07 15:09:40,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:09:40,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-12-07 15:09:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:40,494 INFO L225 Difference]: With dead ends: 41 [2019-12-07 15:09:40,494 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 15:09:40,494 INFO L630 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 [2019-12-07 15:09:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 15:09:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-12-07 15:09:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 15:09:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-12-07 15:09:40,496 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2019-12-07 15:09:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:40,496 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-12-07 15:09:40,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:09:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-12-07 15:09:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 15:09:40,497 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:40,497 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:40,497 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1650962797, now seen corresponding path program 1 times [2019-12-07 15:09:40,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:40,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641470241] [2019-12-07 15:09:40,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:40,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641470241] [2019-12-07 15:09:40,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479845110] [2019-12-07 15:09:40,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:09:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:40,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 15:09:40,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:09:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:40,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:09:40,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-12-07 15:09:40,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933987115] [2019-12-07 15:09:40,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 15:09:40,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 15:09:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2019-12-07 15:09:40,719 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 17 states. [2019-12-07 15:09:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:40,874 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-12-07 15:09:40,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 15:09:40,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-07 15:09:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:40,875 INFO L225 Difference]: With dead ends: 28 [2019-12-07 15:09:40,875 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 15:09:40,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2019-12-07 15:09:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 15:09:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-12-07 15:09:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 15:09:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 15:09:40,877 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2019-12-07 15:09:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:40,878 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 15:09:40,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 15:09:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 15:09:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 15:09:40,878 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:40,878 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:41,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:09:41,080 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:41,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1692198505, now seen corresponding path program 2 times [2019-12-07 15:09:41,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:41,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922773567] [2019-12-07 15:09:41,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:41,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922773567] [2019-12-07 15:09:41,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431877147] [2019-12-07 15:09:41,298 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:09:41,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:09:41,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:09:41,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 15:09:41,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:09:41,424 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 15:09:41,424 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:41,430 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:41,431 INFO L534 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. [2019-12-07 15:09:41,431 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2019-12-07 15:09:41,532 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 15:09:41,533 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:41,534 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:41,534 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:09:41,534 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-12-07 15:09:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:41,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:09:41,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2019-12-07 15:09:41,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087154135] [2019-12-07 15:09:41,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 15:09:41,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:41,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 15:09:41,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2019-12-07 15:09:41,550 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 21 states. [2019-12-07 15:09:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:41,848 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-12-07 15:09:41,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 15:09:41,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-12-07 15:09:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:41,849 INFO L225 Difference]: With dead ends: 42 [2019-12-07 15:09:41,849 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 15:09:41,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2019-12-07 15:09:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 15:09:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-12-07 15:09:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 15:09:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-12-07 15:09:41,851 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2019-12-07 15:09:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:41,851 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-12-07 15:09:41,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 15:09:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-12-07 15:09:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 15:09:41,852 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:41,852 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:42,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:09:42,053 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:42,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:42,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1062009716, now seen corresponding path program 3 times [2019-12-07 15:09:42,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:42,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961647920] [2019-12-07 15:09:42,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:42,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961647920] [2019-12-07 15:09:42,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838723428] [2019-12-07 15:09:42,209 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:09:42,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 15:09:42,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:09:42,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 15:09:42,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:09:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:42,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:09:42,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2019-12-07 15:09:42,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330269907] [2019-12-07 15:09:42,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 15:09:42,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:42,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 15:09:42,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2019-12-07 15:09:42,412 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 25 states. [2019-12-07 15:09:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:42,645 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 15:09:42,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 15:09:42,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2019-12-07 15:09:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:42,646 INFO L225 Difference]: With dead ends: 36 [2019-12-07 15:09:42,646 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 15:09:42,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2019-12-07 15:09:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 15:09:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-12-07 15:09:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 15:09:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-12-07 15:09:42,649 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2019-12-07 15:09:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:42,649 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-12-07 15:09:42,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 15:09:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-12-07 15:09:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 15:09:42,650 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:42,650 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:42,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:09:42,852 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1867118562, now seen corresponding path program 4 times [2019-12-07 15:09:42,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:42,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658632039] [2019-12-07 15:09:42,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:43,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658632039] [2019-12-07 15:09:43,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417303596] [2019-12-07 15:09:43,055 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:09:43,107 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:09:43,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:09:43,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 15:09:43,109 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:09:43,113 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 15:09:43,113 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:43,117 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:43,117 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:09:43,118 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 15:09:43,186 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 15:09:43,186 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:43,189 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:43,189 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:09:43,190 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 15:09:43,500 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2019-12-07 15:09:43,501 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 15:09:43,530 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:43,545 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 15:09:43,550 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:43,551 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-12-07 15:09:43,551 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:43,563 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:43,564 INFO L534 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. [2019-12-07 15:09:43,564 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 15:09:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:43,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:09:43,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2019-12-07 15:09:43,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83683286] [2019-12-07 15:09:43,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 15:09:43,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:43,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 15:09:43,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2019-12-07 15:09:43,570 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2019-12-07 15:09:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:44,202 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 15:09:44,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 15:09:44,203 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2019-12-07 15:09:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:44,203 INFO L225 Difference]: With dead ends: 54 [2019-12-07 15:09:44,203 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 15:09:44,204 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 15:09:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 15:09:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-12-07 15:09:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 15:09:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 15:09:44,206 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2019-12-07 15:09:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:44,206 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 15:09:44,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 15:09:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 15:09:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 15:09:44,207 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:44,207 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:44,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:09:44,408 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash 545438971, now seen corresponding path program 5 times [2019-12-07 15:09:44,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:44,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624412810] [2019-12-07 15:09:44,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:44,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624412810] [2019-12-07 15:09:44,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587627715] [2019-12-07 15:09:44,582 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:09:44,642 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 15:09:44,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:09:44,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 15:09:44,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:09:44,650 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 15:09:44,650 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:44,653 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:44,654 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:09:44,654 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 15:09:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:44,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:09:44,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-12-07 15:09:44,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71257039] [2019-12-07 15:09:44,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 15:09:44,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:44,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 15:09:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2019-12-07 15:09:44,860 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 29 states. [2019-12-07 15:09:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:45,261 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-12-07 15:09:45,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 15:09:45,262 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2019-12-07 15:09:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:45,262 INFO L225 Difference]: With dead ends: 44 [2019-12-07 15:09:45,262 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 15:09:45,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 15:09:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 15:09:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-12-07 15:09:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 15:09:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-12-07 15:09:45,264 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2019-12-07 15:09:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:45,265 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-12-07 15:09:45,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 15:09:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-12-07 15:09:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 15:09:45,266 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:45,266 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:45,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:09:45,467 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1989258789, now seen corresponding path program 6 times [2019-12-07 15:09:45,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:45,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943196532] [2019-12-07 15:09:45,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:45,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943196532] [2019-12-07 15:09:45,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328702584] [2019-12-07 15:09:45,676 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:09:45,735 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 15:09:45,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:09:45,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 51 conjunts are in the unsatisfiable core [2019-12-07 15:09:45,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:09:45,839 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 15:09:45,839 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:45,843 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:09:45,843 INFO L534 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. [2019-12-07 15:09:45,843 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 15:09:50,070 INFO L343 Elim1Store]: treesize reduction 32, result has 54.3 percent of original size [2019-12-07 15:09:50,071 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 52 [2019-12-07 15:09:50,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 15:09:50,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 15:09:50,073 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:09:50,085 INFO L614 ElimStorePlain]: treesize reduction 8, result has 77.8 percent of original size [2019-12-07 15:09:50,086 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:09:50,086 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:3 [2019-12-07 15:09:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 26 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:50,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:09:50,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 38 [2019-12-07 15:09:50,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142406841] [2019-12-07 15:09:50,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 15:09:50,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:09:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 15:09:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1288, Unknown=8, NotChecked=0, Total=1406 [2019-12-07 15:09:50,093 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 38 states. [2019-12-07 15:09:52,453 WARN L192 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2019-12-07 15:09:54,563 WARN L192 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-12-07 15:09:55,146 WARN L192 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-12-07 15:09:56,543 WARN L192 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 63 [2019-12-07 15:09:59,536 WARN L192 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2019-12-07 15:09:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:09:59,553 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-12-07 15:09:59,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 15:09:59,553 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-12-07 15:09:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:09:59,553 INFO L225 Difference]: With dead ends: 66 [2019-12-07 15:09:59,553 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 15:09:59,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=284, Invalid=2899, Unknown=9, NotChecked=0, Total=3192 [2019-12-07 15:09:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 15:09:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-12-07 15:09:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 15:09:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-12-07 15:09:59,556 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2019-12-07 15:09:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:09:59,557 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-12-07 15:09:59,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 15:09:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-12-07 15:09:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 15:09:59,558 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:09:59,558 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:09:59,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:09:59,759 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:09:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:09:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1753336318, now seen corresponding path program 7 times [2019-12-07 15:09:59,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:09:59,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065959613] [2019-12-07 15:09:59,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:09:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:09:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:09:59,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065959613] [2019-12-07 15:09:59,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885857598] [2019-12-07 15:09:59,983 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:10:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:00,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 48 conjunts are in the unsatisfiable core [2019-12-07 15:10:00,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:10:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:00,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:10:00,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2019-12-07 15:10:00,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277196422] [2019-12-07 15:10:00,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 15:10:00,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:10:00,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 15:10:00,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2019-12-07 15:10:00,194 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 29 states. [2019-12-07 15:10:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:10:00,663 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-12-07 15:10:00,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 15:10:00,663 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 45 [2019-12-07 15:10:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:10:00,664 INFO L225 Difference]: With dead ends: 52 [2019-12-07 15:10:00,664 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 15:10:00,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 15:10:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 15:10:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-12-07 15:10:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 15:10:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 15:10:00,666 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2019-12-07 15:10:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:10:00,667 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 15:10:00,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 15:10:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 15:10:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 15:10:00,667 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:10:00,667 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:10:00,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:10:00,868 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:10:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:10:00,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1584706644, now seen corresponding path program 8 times [2019-12-07 15:10:00,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:10:00,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94557080] [2019-12-07 15:10:00,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:10:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:01,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94557080] [2019-12-07 15:10:01,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777311547] [2019-12-07 15:10:01,119 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:10:01,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:10:01,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:10:01,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 58 conjunts are in the unsatisfiable core [2019-12-07 15:10:01,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:10:01,334 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 15:10:01,334 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:01,339 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:01,339 INFO L534 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. [2019-12-07 15:10:01,339 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2019-12-07 15:10:01,663 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 15:10:01,664 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:01,665 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:01,665 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:10:01,665 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-12-07 15:10:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:01,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:10:01,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2019-12-07 15:10:01,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137292880] [2019-12-07 15:10:01,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-07 15:10:01,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:10:01,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-07 15:10:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1462, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 15:10:01,671 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 40 states. [2019-12-07 15:10:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:10:03,481 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-12-07 15:10:03,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 15:10:03,483 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-12-07 15:10:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:10:03,485 INFO L225 Difference]: With dead ends: 78 [2019-12-07 15:10:03,485 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 15:10:03,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=196, Invalid=2666, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 15:10:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 15:10:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-12-07 15:10:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 15:10:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-12-07 15:10:03,498 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2019-12-07 15:10:03,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:10:03,499 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-12-07 15:10:03,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-07 15:10:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-12-07 15:10:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-07 15:10:03,501 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:10:03,502 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:10:03,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:10:03,704 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:10:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:10:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash 739550857, now seen corresponding path program 9 times [2019-12-07 15:10:03,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:10:03,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154142034] [2019-12-07 15:10:03,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:10:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:03,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154142034] [2019-12-07 15:10:03,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829598083] [2019-12-07 15:10:03,980 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:10:04,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 15:10:04,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:10:04,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 51 conjunts are in the unsatisfiable core [2019-12-07 15:10:04,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:10:04,056 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 15:10:04,056 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:04,062 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:04,062 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:10:04,063 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 15:10:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:04,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:10:04,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2019-12-07 15:10:04,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687778500] [2019-12-07 15:10:04,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-07 15:10:04,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:10:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-07 15:10:04,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 15:10:04,456 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 42 states. [2019-12-07 15:10:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:10:05,928 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 15:10:05,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 15:10:05,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2019-12-07 15:10:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:10:05,929 INFO L225 Difference]: With dead ends: 60 [2019-12-07 15:10:05,929 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 15:10:05,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=2672, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 15:10:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 15:10:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-12-07 15:10:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 15:10:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-12-07 15:10:05,933 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2019-12-07 15:10:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:10:05,933 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-12-07 15:10:05,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-07 15:10:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-12-07 15:10:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 15:10:05,934 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:10:05,934 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:10:06,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:10:06,135 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:10:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:10:06,136 INFO L82 PathProgramCache]: Analyzing trace with hash 752361651, now seen corresponding path program 10 times [2019-12-07 15:10:06,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:10:06,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125773941] [2019-12-07 15:10:06,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:10:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:06,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125773941] [2019-12-07 15:10:06,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837655102] [2019-12-07 15:10:06,489 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/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 [2019-12-07 15:10:06,549 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:10:06,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:10:06,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 56 conjunts are in the unsatisfiable core [2019-12-07 15:10:06,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:10:06,555 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 15:10:06,556 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:06,559 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:06,559 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:10:06,559 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 15:10:06,736 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 15:10:06,736 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:06,739 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:06,739 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:10:06,740 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 15:10:07,289 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2019-12-07 15:10:07,289 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 15:10:07,296 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:07,298 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 15:10:07,299 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:07,299 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-12-07 15:10:07,299 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:07,303 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:07,304 INFO L534 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. [2019-12-07 15:10:07,304 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 15:10:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 67 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:07,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:10:07,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2019-12-07 15:10:07,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013150600] [2019-12-07 15:10:07,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-07 15:10:07,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:10:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-07 15:10:07,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1929, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 15:10:07,314 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 46 states. [2019-12-07 15:10:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:10:10,105 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2019-12-07 15:10:10,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 15:10:10,105 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 57 [2019-12-07 15:10:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:10:10,105 INFO L225 Difference]: With dead ends: 90 [2019-12-07 15:10:10,106 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 15:10:10,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=356, Invalid=4200, Unknown=0, NotChecked=0, Total=4556 [2019-12-07 15:10:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 15:10:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-12-07 15:10:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 15:10:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-12-07 15:10:10,108 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2019-12-07 15:10:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:10:10,109 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-12-07 15:10:10,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-07 15:10:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-12-07 15:10:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-12-07 15:10:10,109 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:10:10,109 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:10:10,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:10:10,310 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:10:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:10:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash 746278544, now seen corresponding path program 11 times [2019-12-07 15:10:10,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:10:10,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028828755] [2019-12-07 15:10:10,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:10:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 47 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:10,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028828755] [2019-12-07 15:10:10,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231411815] [2019-12-07 15:10:10,631 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:10:10,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-07 15:10:10,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:10:10,703 INFO L264 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 71 conjunts are in the unsatisfiable core [2019-12-07 15:10:10,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:10:10,708 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 15:10:10,708 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:10,711 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:10,711 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:10:10,712 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 15:10:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:10,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:10:10,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 37 [2019-12-07 15:10:10,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936959190] [2019-12-07 15:10:11,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 15:10:11,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:10:11,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 15:10:11,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 15:10:11,001 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 38 states. [2019-12-07 15:10:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:10:12,479 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2019-12-07 15:10:12,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 15:10:12,481 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 61 [2019-12-07 15:10:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:10:12,483 INFO L225 Difference]: With dead ends: 68 [2019-12-07 15:10:12,483 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 15:10:12,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2019-12-07 15:10:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 15:10:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-12-07 15:10:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 15:10:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-12-07 15:10:12,491 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2019-12-07 15:10:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:10:12,492 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-12-07 15:10:12,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 15:10:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-12-07 15:10:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-12-07 15:10:12,494 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:10:12,494 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:10:12,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:10:12,695 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2019-12-07 15:10:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:10:12,696 INFO L82 PathProgramCache]: Analyzing trace with hash -905089734, now seen corresponding path program 12 times [2019-12-07 15:10:12,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:10:12,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118557802] [2019-12-07 15:10:12,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:10:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:10:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:10:13,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118557802] [2019-12-07 15:10:13,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221400305] [2019-12-07 15:10:13,091 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:10:13,175 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-07 15:10:13,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:10:13,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 15:10:13,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:10:13,181 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 15:10:13,181 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:13,184 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:13,185 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:10:13,185 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-12-07 15:10:13,211 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 15:10:13,212 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 15:10:13,213 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:13,213 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:10:13,213 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-12-07 15:10:13,295 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:13,295 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2019-12-07 15:10:13,295 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 15:10:13,302 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 15:10:13,302 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 15:10:13,302 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2019-12-07 15:10:13,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 15:10:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-12-07 15:10:13,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:10:13,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 36 [2019-12-07 15:10:13,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845557310] [2019-12-07 15:10:13,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 15:10:13,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:10:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 15:10:13,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 15:10:13,444 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 36 states. [2019-12-07 15:10:16,086 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2019-12-07 15:10:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:10:17,092 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2019-12-07 15:10:17,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-07 15:10:17,092 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 65 [2019-12-07 15:10:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:10:17,093 INFO L225 Difference]: With dead ends: 101 [2019-12-07 15:10:17,093 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 15:10:17,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=596, Invalid=6046, Unknown=0, NotChecked=0, Total=6642 [2019-12-07 15:10:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 15:10:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 15:10:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 15:10:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 15:10:17,095 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2019-12-07 15:10:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:10:17,095 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 15:10:17,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 15:10:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 15:10:17,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 15:10:17,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:10:17,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 03:10:17 BoogieIcfgContainer [2019-12-07 15:10:17,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 15:10:17,307 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:10:17,307 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:10:17,308 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:10:17,308 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:09:38" (3/4) ... [2019-12-07 15:10:17,315 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 15:10:17,329 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-12-07 15:10:17,329 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-12-07 15:10:17,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-12-07 15:10:17,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-12-07 15:10:17,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-12-07 15:10:17,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-12-07 15:10:17,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure strlen_rec [2019-12-07 15:10:17,330 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-12-07 15:10:17,333 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2019-12-07 15:10:17,333 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 15:10:17,333 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 15:10:17,333 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 15:10:17,360 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a8a005a4-f48c-4f6d-9425-c397aea0f396/bin/uautomizer/witness.graphml [2019-12-07 15:10:17,360 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:10:17,361 INFO L168 Benchmark]: Toolchain (without parser) took 39498.11 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 278.9 MB). Free memory was 946.2 MB in the beginning and 905.1 MB in the end (delta: 41.1 MB). Peak memory consumption was 320.0 MB. Max. memory is 11.5 GB. [2019-12-07 15:10:17,361 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:10:17,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.60 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -143.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:10:17,361 INFO L168 Benchmark]: Boogie Preprocessor took 35.46 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:10:17,362 INFO L168 Benchmark]: RCFGBuilder took 284.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:10:17,362 INFO L168 Benchmark]: TraceAbstraction took 38785.52 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 177.7 MB). Free memory was 1.0 GB in the beginning and 917.4 MB in the end (delta: 118.0 MB). Peak memory consumption was 295.7 MB. Max. memory is 11.5 GB. [2019-12-07 15:10:17,362 INFO L168 Benchmark]: Witness Printer took 52.91 ms. Allocated memory is still 1.3 GB. Free memory was 917.4 MB in the beginning and 905.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. [2019-12-07 15:10:17,363 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 336.60 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -143.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.46 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 284.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 38785.52 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 177.7 MB). Free memory was 1.0 GB in the beginning and 917.4 MB in the end (delta: 118.0 MB). Peak memory consumption was 295.7 MB. Max. memory is 11.5 GB. * Witness Printer took 52.91 ms. Allocated memory is still 1.3 GB. Free memory was 917.4 MB in the beginning and 905.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: 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, 48 locations, 7 error locations. Result: SAFE, OverallTime: 38.7s, OverallIterations: 22, TraceHistogramMax: 8, AutomataDifference: 23.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 429 SDtfs, 1061 SDslu, 2258 SDs, 0 SdLazy, 10111 SolverSat, 258 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 6.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1040 GetRequests, 409 SyntacticMatches, 16 SemanticMatches, 615 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4896 ImplicationChecksByTransitivity, 25.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred 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: 0.0s AutomataMinimizationTime, 22 MinimizatonAttempts, 66 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 1178 NumberOfCodeBlocks, 1169 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1143 ConstructedInterpolants, 21 QuantifiedInterpolants, 450299 SizeOfPredicates, 168 NumberOfNonLiveVariables, 2079 ConjunctsInSsa, 547 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 536/1572 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...