./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.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_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 a9da884533d6d47d95abcc742a22337ea753025b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 18:26:36,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:26:36,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:26:36,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:26:36,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:26:36,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:26:36,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:26:36,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:26:36,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:26:36,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:26:36,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:26:36,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:26:36,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:26:36,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:26:36,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:26:36,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:26:36,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:26:36,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:26:36,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:26:36,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:26:36,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:26:36,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:26:36,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:26:36,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:26:36,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:26:36,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:26:36,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:26:36,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:26:36,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:26:36,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:26:36,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:26:36,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:26:36,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:26:36,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:26:36,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:26:36,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:26:36,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:26:36,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:26:36,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:26:36,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:26:36,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:26:36,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-12-07 18:26:36,427 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:26:36,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:26:36,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:26:36,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:26:36,428 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:26:36,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:26:36,429 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:26:36,429 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 18:26:36,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:26:36,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:26:36,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:26:36,429 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 18:26:36,429 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 18:26:36,430 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 18:26:36,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:26:36,430 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 18:26:36,430 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:26:36,430 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:26:36,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:26:36,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:26:36,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:26:36,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:26:36,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:26:36,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:26:36,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:26:36,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:26:36,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:26:36,432 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:26:36,432 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_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 -> a9da884533d6d47d95abcc742a22337ea753025b [2019-12-07 18:26:36,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:26:36,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:26:36,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:26:36,558 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:26:36,558 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:26:36,559 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2019-12-07 18:26:36,607 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/data/fed1bfef8/e6c9ae2bd6344313ad5e82c0d05d0e7a/FLAG6447d7e46 [2019-12-07 18:26:37,048 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:26:37,049 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2019-12-07 18:26:37,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/data/fed1bfef8/e6c9ae2bd6344313ad5e82c0d05d0e7a/FLAG6447d7e46 [2019-12-07 18:26:37,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/data/fed1bfef8/e6c9ae2bd6344313ad5e82c0d05d0e7a [2019-12-07 18:26:37,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:26:37,069 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 18:26:37,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:26:37,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:26:37,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:26:37,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c43023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37, skipping insertion in model container [2019-12-07 18:26:37,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:26:37,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:26:37,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:26:37,311 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:26:37,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:26:37,370 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:26:37,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37 WrapperNode [2019-12-07 18:26:37,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:26:37,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:26:37,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:26:37,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:26:37,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (1/1) ... [2019-12-07 18:26:37,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:26:37,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:26:37,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:26:37,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:26:37,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:37,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 18:26:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:26:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-12-07 18:26:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-12-07 18:26:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-12-07 18:26:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-12-07 18:26:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-12-07 18:26:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2019-12-07 18:26:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 18:26:37,446 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-12-07 18:26:37,446 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-12-07 18:26:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-12-07 18:26:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-12-07 18:26:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-12-07 18:26:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-12-07 18:26:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-12-07 18:26:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-12-07 18:26:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-12-07 18:26:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 18:26:37,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 18:26:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 18:26:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 18:26:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:26:37,686 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:26:37,686 INFO L287 CfgBuilder]: Removed 2 assume(true) statements. [2019-12-07 18:26:37,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:26:37 BoogieIcfgContainer [2019-12-07 18:26:37,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:26:37,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:26:37,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:26:37,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:26:37,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:26:37" (1/3) ... [2019-12-07 18:26:37,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5979e69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:26:37, skipping insertion in model container [2019-12-07 18:26:37,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:26:37" (2/3) ... [2019-12-07 18:26:37,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5979e69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:26:37, skipping insertion in model container [2019-12-07 18:26:37,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:26:37" (3/3) ... [2019-12-07 18:26:37,692 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2019-12-07 18:26:37,698 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:26:37,702 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-12-07 18:26:37,709 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-12-07 18:26:37,721 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:26:37,721 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 18:26:37,721 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:26:37,721 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:26:37,722 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:26:37,722 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:26:37,722 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:26:37,722 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:26:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-12-07 18:26:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 18:26:37,737 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:37,737 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:37,737 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341813, now seen corresponding path program 1 times [2019-12-07 18:26:37,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:37,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028052632] [2019-12-07 18:26:37,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:37,873 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 18:26:37,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028052632] [2019-12-07 18:26:37,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:37,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:26:37,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992749754] [2019-12-07 18:26:37,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:26:37,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:37,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:26:37,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:26:37,888 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2019-12-07 18:26:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:37,960 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-12-07 18:26:37,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:26:37,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 18:26:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:37,967 INFO L225 Difference]: With dead ends: 30 [2019-12-07 18:26:37,968 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 18:26:37,969 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 18:26:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 18:26:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-12-07 18:26:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 18:26:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-12-07 18:26:37,992 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2019-12-07 18:26:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:37,992 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-12-07 18:26:37,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:26:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-12-07 18:26:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 18:26:37,992 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:37,992 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:37,993 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:37,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341814, now seen corresponding path program 1 times [2019-12-07 18:26:37,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:37,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271926111] [2019-12-07 18:26:37,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,050 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 18:26:38,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271926111] [2019-12-07 18:26:38,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:38,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:26:38,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680877809] [2019-12-07 18:26:38,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:26:38,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:38,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:26:38,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:26:38,053 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2019-12-07 18:26:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:38,104 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-12-07 18:26:38,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:26:38,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 18:26:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:38,105 INFO L225 Difference]: With dead ends: 26 [2019-12-07 18:26:38,105 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 18:26:38,105 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 18:26:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 18:26:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 18:26:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:26:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-12-07 18:26:38,108 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2019-12-07 18:26:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:38,108 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-12-07 18:26:38,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:26:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-12-07 18:26:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 18:26:38,109 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:38,109 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:38,109 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341867, now seen corresponding path program 1 times [2019-12-07 18:26:38,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:38,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079041763] [2019-12-07 18:26:38,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,148 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 18:26:38,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079041763] [2019-12-07 18:26:38,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:38,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:26:38,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113003782] [2019-12-07 18:26:38,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:26:38,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:38,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:26:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:26:38,150 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2019-12-07 18:26:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:38,204 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 18:26:38,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:26:38,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 18:26:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:38,206 INFO L225 Difference]: With dead ends: 33 [2019-12-07 18:26:38,207 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 18:26:38,207 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 18:26:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 18:26:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-12-07 18:26:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 18:26:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 18:26:38,215 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2019-12-07 18:26:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:38,215 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 18:26:38,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:26:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 18:26:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 18:26:38,216 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:38,216 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:38,216 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1480401449, now seen corresponding path program 1 times [2019-12-07 18:26:38,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:38,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308024381] [2019-12-07 18:26:38,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,267 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 18:26:38,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308024381] [2019-12-07 18:26:38,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:38,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:26:38,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431962505] [2019-12-07 18:26:38,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:26:38,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:26:38,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:26:38,269 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2019-12-07 18:26:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:38,332 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2019-12-07 18:26:38,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:26:38,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 18:26:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:38,333 INFO L225 Difference]: With dead ends: 37 [2019-12-07 18:26:38,333 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 18:26:38,334 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 18:26:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 18:26:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-12-07 18:26:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 18:26:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-12-07 18:26:38,337 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 10 [2019-12-07 18:26:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:38,337 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-12-07 18:26:38,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:26:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-12-07 18:26:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:26:38,338 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:38,338 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:38,338 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:38,338 INFO L82 PathProgramCache]: Analyzing trace with hash 138789715, now seen corresponding path program 1 times [2019-12-07 18:26:38,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:38,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514094574] [2019-12-07 18:26:38,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,375 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 18:26:38,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514094574] [2019-12-07 18:26:38,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:38,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:26:38,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839486193] [2019-12-07 18:26:38,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:26:38,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:38,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:26:38,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:26:38,376 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2019-12-07 18:26:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:38,442 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-12-07 18:26:38,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:26:38,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-12-07 18:26:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:38,443 INFO L225 Difference]: With dead ends: 29 [2019-12-07 18:26:38,443 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 18:26:38,443 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 18:26:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 18:26:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 18:26:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 18:26:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-12-07 18:26:38,447 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2019-12-07 18:26:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:38,448 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-12-07 18:26:38,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:26:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-12-07 18:26:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:26:38,448 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:38,448 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:38,449 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash 138789716, now seen corresponding path program 1 times [2019-12-07 18:26:38,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:38,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883453647] [2019-12-07 18:26:38,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,521 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 18:26:38,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883453647] [2019-12-07 18:26:38,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:38,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 18:26:38,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487032305] [2019-12-07 18:26:38,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:26:38,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:26:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:26:38,524 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2019-12-07 18:26:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:38,620 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-12-07 18:26:38,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:26:38,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-07 18:26:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:38,622 INFO L225 Difference]: With dead ends: 34 [2019-12-07 18:26:38,622 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 18:26:38,622 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 18:26:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 18:26:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-12-07 18:26:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 18:26:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-12-07 18:26:38,625 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2019-12-07 18:26:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:38,625 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-12-07 18:26:38,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:26:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-12-07 18:26:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:26:38,626 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:38,626 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:38,626 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash 232930637, now seen corresponding path program 1 times [2019-12-07 18:26:38,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:38,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123701868] [2019-12-07 18:26:38,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:38,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123701868] [2019-12-07 18:26:38,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:38,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-12-07 18:26:38,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288749901] [2019-12-07 18:26:38,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 18:26:38,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:38,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:26:38,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:26:38,713 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2019-12-07 18:26:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:38,832 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-12-07 18:26:38,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:26:38,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-12-07 18:26:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:38,833 INFO L225 Difference]: With dead ends: 41 [2019-12-07 18:26:38,833 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 18:26:38,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:26:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 18:26:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-12-07 18:26:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 18:26:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-12-07 18:26:38,837 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2019-12-07 18:26:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:38,838 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-12-07 18:26:38,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 18:26:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-12-07 18:26:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:26:38,838 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:38,838 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:38,838 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:38,839 INFO L82 PathProgramCache]: Analyzing trace with hash 912989007, now seen corresponding path program 1 times [2019-12-07 18:26:38,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:38,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145184531] [2019-12-07 18:26:38,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:38,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145184531] [2019-12-07 18:26:38,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:38,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-12-07 18:26:38,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698365654] [2019-12-07 18:26:38,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:26:38,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:38,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:26:38,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:26:38,938 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2019-12-07 18:26:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:39,071 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-12-07 18:26:39,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:26:39,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-07 18:26:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:39,072 INFO L225 Difference]: With dead ends: 51 [2019-12-07 18:26:39,072 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 18:26:39,072 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 18:26:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 18:26:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2019-12-07 18:26:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 18:26:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-12-07 18:26:39,076 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2019-12-07 18:26:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:39,076 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-12-07 18:26:39,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:26:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-12-07 18:26:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 18:26:39,077 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:39,077 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:39,077 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:39,077 INFO L82 PathProgramCache]: Analyzing trace with hash -754029460, now seen corresponding path program 1 times [2019-12-07 18:26:39,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:39,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224578371] [2019-12-07 18:26:39,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,126 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 18:26:39,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224578371] [2019-12-07 18:26:39,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058707297] [2019-12-07 18:26:39,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 18:26:39,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:39,221 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 18:26:39,222 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:39,226 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:39,227 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:39,227 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:26:39,237 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 18:26:39,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:39,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-12-07 18:26:39,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979324412] [2019-12-07 18:26:39,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:26:39,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:26:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:26:39,238 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 7 states. [2019-12-07 18:26:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:39,295 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-12-07 18:26:39,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:26:39,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-12-07 18:26:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:39,296 INFO L225 Difference]: With dead ends: 42 [2019-12-07 18:26:39,296 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 18:26:39,296 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 18:26:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 18:26:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2019-12-07 18:26:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 18:26:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-12-07 18:26:39,300 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2019-12-07 18:26:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:39,300 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-12-07 18:26:39,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:26:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-12-07 18:26:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 18:26:39,301 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:39,301 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:39,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:39,502 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:39,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:39,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1444358493, now seen corresponding path program 1 times [2019-12-07 18:26:39,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:39,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390230958] [2019-12-07 18:26:39,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,574 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 18:26:39,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390230958] [2019-12-07 18:26:39,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:26:39,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:26:39,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218631619] [2019-12-07 18:26:39,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:26:39,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:39,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:26:39,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:26:39,576 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 5 states. [2019-12-07 18:26:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:39,607 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2019-12-07 18:26:39,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:26:39,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-12-07 18:26:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:39,607 INFO L225 Difference]: With dead ends: 35 [2019-12-07 18:26:39,608 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 18:26:39,608 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 18:26:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 18:26:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 18:26:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 18:26:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 18:26:39,609 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2019-12-07 18:26:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:39,609 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 18:26:39,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:26:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 18:26:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 18:26:39,610 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:39,610 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:39,610 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:39,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1892891924, now seen corresponding path program 1 times [2019-12-07 18:26:39,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:39,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398261104] [2019-12-07 18:26:39,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,693 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 18:26:39,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398261104] [2019-12-07 18:26:39,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498981482] [2019-12-07 18:26:39,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:39,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 18:26:39,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:39,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:39,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-12-07 18:26:39,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930521194] [2019-12-07 18:26:39,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:26:39,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:39,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:26:39,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:26:39,808 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 16 states. [2019-12-07 18:26:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:39,938 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-12-07 18:26:39,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:26:39,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-07 18:26:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:39,939 INFO L225 Difference]: With dead ends: 23 [2019-12-07 18:26:39,939 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 18:26:39,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-12-07 18:26:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 18:26:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-12-07 18:26:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:26:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-12-07 18:26:39,941 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-12-07 18:26:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:39,941 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-12-07 18:26:39,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:26:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-12-07 18:26:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 18:26:39,942 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:39,942 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:40,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:40,143 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:40,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1996994277, now seen corresponding path program 2 times [2019-12-07 18:26:40,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:40,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273062889] [2019-12-07 18:26:40,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:40,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273062889] [2019-12-07 18:26:40,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479476887] [2019-12-07 18:26:40,331 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:40,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:26:40,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:40,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 18:26:40,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:40,447 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 18:26:40,448 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:40,452 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:40,453 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 18:26:40,453 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 18:26:40,544 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:40,545 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 18 treesize of output 18 [2019-12-07 18:26:40,545 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:26:40,554 INFO L614 ElimStorePlain]: treesize reduction 8, result has 55.6 percent of original size [2019-12-07 18:26:40,554 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 18:26:40,555 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2019-12-07 18:26:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:40,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:40,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-12-07 18:26:40,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385331336] [2019-12-07 18:26:40,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 18:26:40,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:40,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 18:26:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2019-12-07 18:26:40,574 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 21 states. [2019-12-07 18:26:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:40,841 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 18:26:40,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 18:26:40,841 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2019-12-07 18:26:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:40,842 INFO L225 Difference]: With dead ends: 36 [2019-12-07 18:26:40,842 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 18:26:40,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2019-12-07 18:26:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 18:26:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-12-07 18:26:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:26:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 18:26:40,845 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2019-12-07 18:26:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:40,845 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 18:26:40,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 18:26:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 18:26:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 18:26:40,846 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:40,846 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:41,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:41,047 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:41,048 INFO L82 PathProgramCache]: Analyzing trace with hash 484603074, now seen corresponding path program 3 times [2019-12-07 18:26:41,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:41,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786144230] [2019-12-07 18:26:41,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:41,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786144230] [2019-12-07 18:26:41,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243603822] [2019-12-07 18:26:41,259 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:41,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 18:26:41,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:41,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 18:26:41,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:41,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:41,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2019-12-07 18:26:41,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537201666] [2019-12-07 18:26:41,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 18:26:41,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:41,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 18:26:41,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:26:41,414 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 18 states. [2019-12-07 18:26:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:41,566 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-12-07 18:26:41,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:26:41,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-12-07 18:26:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:41,567 INFO L225 Difference]: With dead ends: 29 [2019-12-07 18:26:41,567 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 18:26:41,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2019-12-07 18:26:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 18:26:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-12-07 18:26:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 18:26:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-12-07 18:26:41,569 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-12-07 18:26:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:41,569 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-12-07 18:26:41,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 18:26:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-12-07 18:26:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 18:26:41,569 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:41,569 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:41,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:41,771 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:41,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1847085883, now seen corresponding path program 4 times [2019-12-07 18:26:41,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:41,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74732292] [2019-12-07 18:26:41,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:41,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74732292] [2019-12-07 18:26:41,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286790043] [2019-12-07 18:26:41,920 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:41,974 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:26:41,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:41,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 18:26:41,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:41,980 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 18:26:41,981 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:41,985 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:41,985 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:41,986 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:26:42,050 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 18:26:42,051 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:42,054 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:42,054 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:42,054 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 18:26:42,193 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 18:26:42,193 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 18:26:42,200 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:42,202 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:26:42,204 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:42,204 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 18:26:42,204 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:42,208 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:42,209 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 18:26:42,209 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 18:26:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:42,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:42,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2019-12-07 18:26:42,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830161627] [2019-12-07 18:26:42,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 18:26:42,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 18:26:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2019-12-07 18:26:42,216 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 24 states. [2019-12-07 18:26:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:43,198 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-12-07 18:26:43,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 18:26:43,200 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-07 18:26:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:43,201 INFO L225 Difference]: With dead ends: 44 [2019-12-07 18:26:43,201 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 18:26:43,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 18:26:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 18:26:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-12-07 18:26:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 18:26:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 18:26:43,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2019-12-07 18:26:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:43,212 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 18:26:43,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 18:26:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 18:26:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 18:26:43,214 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:43,215 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:43,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:43,416 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1827827544, now seen corresponding path program 5 times [2019-12-07 18:26:43,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:43,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078625810] [2019-12-07 18:26:43,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:43,569 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 18:26:43,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078625810] [2019-12-07 18:26:43,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59482919] [2019-12-07 18:26:43,569 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:43,624 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 18:26:43,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:43,625 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 18:26:43,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:43,630 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 18:26:43,630 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:43,634 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:43,634 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:43,634 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:26:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:43,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:43,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2019-12-07 18:26:43,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860362243] [2019-12-07 18:26:43,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 18:26:43,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:43,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 18:26:43,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:26:43,711 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 19 states. [2019-12-07 18:26:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:43,900 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2019-12-07 18:26:43,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 18:26:43,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2019-12-07 18:26:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:43,901 INFO L225 Difference]: With dead ends: 35 [2019-12-07 18:26:43,901 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 18:26:43,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2019-12-07 18:26:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 18:26:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-12-07 18:26:43,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 18:26:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-12-07 18:26:43,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-12-07 18:26:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:43,903 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-12-07 18:26:43,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 18:26:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-12-07 18:26:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 18:26:43,904 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:43,904 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:44,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:44,105 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:44,106 INFO L82 PathProgramCache]: Analyzing trace with hash -99354543, now seen corresponding path program 6 times [2019-12-07 18:26:44,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:44,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842284858] [2019-12-07 18:26:44,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:44,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842284858] [2019-12-07 18:26:44,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242855320] [2019-12-07 18:26:44,284 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:44,341 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 18:26:44,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:44,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-07 18:26:44,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:44,348 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 18:26:44,348 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:44,352 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:44,352 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:44,352 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:26:44,463 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 16 treesize of output 12 [2019-12-07 18:26:44,464 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:44,468 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:44,469 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:44,469 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-12-07 18:26:44,588 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 29 treesize of output 21 [2019-12-07 18:26:44,589 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 18:26:44,598 INFO L614 ElimStorePlain]: treesize reduction 5, result has 79.2 percent of original size [2019-12-07 18:26:44,598 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:26:44,599 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:19 [2019-12-07 18:26:44,652 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:26:44,653 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:44,653 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 18:26:44,654 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:44,657 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:44,657 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:44,657 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2019-12-07 18:26:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:44,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:44,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2019-12-07 18:26:44,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80537414] [2019-12-07 18:26:44,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 18:26:44,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:44,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 18:26:44,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2019-12-07 18:26:44,662 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 29 states. [2019-12-07 18:26:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:45,005 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-12-07 18:26:45,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 18:26:45,006 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2019-12-07 18:26:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:45,006 INFO L225 Difference]: With dead ends: 52 [2019-12-07 18:26:45,006 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 18:26:45,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 18:26:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 18:26:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-12-07 18:26:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 18:26:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 18:26:45,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2019-12-07 18:26:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:45,009 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 18:26:45,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 18:26:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 18:26:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 18:26:45,010 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:45,010 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:45,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:45,211 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:45,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1272435374, now seen corresponding path program 7 times [2019-12-07 18:26:45,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:45,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242764264] [2019-12-07 18:26:45,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:45,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242764264] [2019-12-07 18:26:45,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828003101] [2019-12-07 18:26:45,373 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:45,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 18:26:45,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:45,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:45,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2019-12-07 18:26:45,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479169956] [2019-12-07 18:26:45,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 18:26:45,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 18:26:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2019-12-07 18:26:45,541 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2019-12-07 18:26:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:45,814 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-12-07 18:26:45,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 18:26:45,814 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2019-12-07 18:26:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:45,815 INFO L225 Difference]: With dead ends: 41 [2019-12-07 18:26:45,815 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 18:26:45,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2019-12-07 18:26:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 18:26:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-12-07 18:26:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 18:26:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-12-07 18:26:45,818 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-12-07 18:26:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:45,818 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-12-07 18:26:45,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 18:26:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-12-07 18:26:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 18:26:45,819 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:45,819 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:46,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:46,020 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1255285209, now seen corresponding path program 8 times [2019-12-07 18:26:46,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:46,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160250962] [2019-12-07 18:26:46,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:46,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160250962] [2019-12-07 18:26:46,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94418661] [2019-12-07 18:26:46,213 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:46,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:26:46,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:46,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 18:26:46,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:46,396 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 18:26:46,396 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:46,400 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:46,400 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 18:26:46,400 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 18:26:46,504 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 18:26:46,504 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:46,505 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:46,505 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:46,505 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 18:26:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:46,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:46,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2019-12-07 18:26:46,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363551428] [2019-12-07 18:26:46,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 18:26:46,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:46,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 18:26:46,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2019-12-07 18:26:46,509 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 28 states. [2019-12-07 18:26:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:47,025 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 18:26:47,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 18:26:47,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2019-12-07 18:26:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:47,025 INFO L225 Difference]: With dead ends: 60 [2019-12-07 18:26:47,025 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 18:26:47,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 18:26:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 18:26:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-12-07 18:26:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 18:26:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 18:26:47,028 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2019-12-07 18:26:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:47,029 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 18:26:47,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 18:26:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 18:26:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-07 18:26:47,029 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:47,029 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:47,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:47,231 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:47,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1362510140, now seen corresponding path program 9 times [2019-12-07 18:26:47,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:47,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008007666] [2019-12-07 18:26:47,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:47,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008007666] [2019-12-07 18:26:47,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493569445] [2019-12-07 18:26:47,404 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:47,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 18:26:47,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:47,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 18:26:47,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:47,479 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 18:26:47,479 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:47,483 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:47,483 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:47,483 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:26:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:47,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:47,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2019-12-07 18:26:47,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951200677] [2019-12-07 18:26:47,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-07 18:26:47,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-07 18:26:47,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2019-12-07 18:26:47,728 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 32 states. [2019-12-07 18:26:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:48,161 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2019-12-07 18:26:48,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 18:26:48,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2019-12-07 18:26:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:48,162 INFO L225 Difference]: With dead ends: 47 [2019-12-07 18:26:48,162 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 18:26:48,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 18:26:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 18:26:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-12-07 18:26:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 18:26:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-12-07 18:26:48,164 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-12-07 18:26:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:48,164 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-12-07 18:26:48,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-07 18:26:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-12-07 18:26:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 18:26:48,164 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:48,164 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:48,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:48,366 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:48,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash 592780477, now seen corresponding path program 10 times [2019-12-07 18:26:48,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:48,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530263079] [2019-12-07 18:26:48,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:48,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530263079] [2019-12-07 18:26:48,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938088181] [2019-12-07 18:26:48,611 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:48,671 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:26:48,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:48,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 18:26:48,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:48,677 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 18:26:48,677 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:48,681 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:48,681 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:48,682 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:26:48,830 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 18:26:48,830 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:48,832 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:48,833 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:48,833 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 18:26:49,089 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 18:26:49,090 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 18:26:49,098 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:49,101 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:26:49,102 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:49,102 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 18:26:49,102 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:49,107 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:49,108 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 18:26:49,108 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 18:26:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:49,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:49,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2019-12-07 18:26:49,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666830062] [2019-12-07 18:26:49,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 18:26:49,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 18:26:49,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 18:26:49,114 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 36 states. [2019-12-07 18:26:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:49,954 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2019-12-07 18:26:49,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 18:26:49,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 45 [2019-12-07 18:26:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:49,954 INFO L225 Difference]: With dead ends: 68 [2019-12-07 18:26:49,954 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 18:26:49,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=2495, Unknown=0, NotChecked=0, Total=2756 [2019-12-07 18:26:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 18:26:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-12-07 18:26:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 18:26:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 18:26:49,957 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2019-12-07 18:26:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:49,958 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 18:26:49,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 18:26:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 18:26:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 18:26:49,958 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:49,959 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:50,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:50,159 INFO L410 AbstractCegarLoop]: === Iteration 21 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash 565924762, now seen corresponding path program 11 times [2019-12-07 18:26:50,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:50,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236357825] [2019-12-07 18:26:50,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 47 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:50,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236357825] [2019-12-07 18:26:50,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050329984] [2019-12-07 18:26:50,368 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:50,431 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-07 18:26:50,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:50,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 51 conjunts are in the unsatisfiable core [2019-12-07 18:26:50,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:50,437 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 18:26:50,437 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:50,441 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:50,441 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:50,441 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:26:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:50,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:50,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 25 [2019-12-07 18:26:50,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876004565] [2019-12-07 18:26:50,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 18:26:50,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 18:26:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2019-12-07 18:26:50,545 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 26 states. [2019-12-07 18:26:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:50,933 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-12-07 18:26:50,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 18:26:50,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2019-12-07 18:26:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:50,934 INFO L225 Difference]: With dead ends: 53 [2019-12-07 18:26:50,934 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 18:26:50,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 18:26:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 18:26:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-12-07 18:26:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 18:26:50,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-12-07 18:26:50,936 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-12-07 18:26:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:50,936 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-12-07 18:26:50,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 18:26:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-12-07 18:26:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 18:26:50,936 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:50,936 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:51,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:51,137 INFO L410 AbstractCegarLoop]: === Iteration 22 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:51,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1607150573, now seen corresponding path program 12 times [2019-12-07 18:26:51,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:51,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002324110] [2019-12-07 18:26:51,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:51,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002324110] [2019-12-07 18:26:51,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192650372] [2019-12-07 18:26:51,399 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/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 18:26:51,478 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-07 18:26:51,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:51,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjunts are in the unsatisfiable core [2019-12-07 18:26:51,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:51,646 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 18:26:51,646 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:51,650 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:51,650 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 18:26:51,650 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 18:26:51,773 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 18:26:51,774 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:51,775 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:51,775 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:51,775 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 18:26:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:51,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:51,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 34 [2019-12-07 18:26:51,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382115007] [2019-12-07 18:26:51,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 18:26:51,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 18:26:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 18:26:51,780 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 34 states. [2019-12-07 18:26:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:52,551 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2019-12-07 18:26:52,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 18:26:52,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 51 [2019-12-07 18:26:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:52,553 INFO L225 Difference]: With dead ends: 76 [2019-12-07 18:26:52,553 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 18:26:52,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=1903, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 18:26:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 18:26:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-12-07 18:26:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 18:26:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-12-07 18:26:52,558 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2019-12-07 18:26:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:52,558 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-12-07 18:26:52,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 18:26:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-12-07 18:26:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-12-07 18:26:52,559 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:52,559 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:52,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:52,760 INFO L410 AbstractCegarLoop]: === Iteration 23 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash -178540240, now seen corresponding path program 13 times [2019-12-07 18:26:52,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:52,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8769815] [2019-12-07 18:26:52,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 68 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:53,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8769815] [2019-12-07 18:26:53,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140793818] [2019-12-07 18:26:53,014 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:53,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 18:26:53,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:53,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:53,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 33 [2019-12-07 18:26:53,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364150191] [2019-12-07 18:26:53,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 18:26:53,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 18:26:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 18:26:53,250 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 34 states. [2019-12-07 18:26:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:54,873 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2019-12-07 18:26:54,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 18:26:54,874 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 55 [2019-12-07 18:26:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:54,876 INFO L225 Difference]: With dead ends: 59 [2019-12-07 18:26:54,876 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 18:26:54,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 18:26:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 18:26:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-12-07 18:26:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 18:26:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2019-12-07 18:26:54,882 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2019-12-07 18:26:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:54,883 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2019-12-07 18:26:54,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 18:26:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2019-12-07 18:26:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 18:26:54,884 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:54,884 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:55,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:55,086 INFO L410 AbstractCegarLoop]: === Iteration 24 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash 221520937, now seen corresponding path program 14 times [2019-12-07 18:26:55,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:55,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318338394] [2019-12-07 18:26:55,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:55,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318338394] [2019-12-07 18:26:55,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173614715] [2019-12-07 18:26:55,400 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:55,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:26:55,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:55,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 61 conjunts are in the unsatisfiable core [2019-12-07 18:26:55,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:55,658 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 18:26:55,658 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:55,662 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:55,662 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 18:26:55,662 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 18:26:55,795 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 18:26:55,795 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:55,797 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:55,797 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:55,797 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 18:26:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:55,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:55,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 37 [2019-12-07 18:26:55,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211122330] [2019-12-07 18:26:55,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-07 18:26:55,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:55,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-07 18:26:55,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 18:26:55,805 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 37 states. [2019-12-07 18:26:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:57,269 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2019-12-07 18:26:57,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 18:26:57,270 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 57 [2019-12-07 18:26:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:57,271 INFO L225 Difference]: With dead ends: 84 [2019-12-07 18:26:57,271 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 18:26:57,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=181, Invalid=2269, Unknown=0, NotChecked=0, Total=2450 [2019-12-07 18:26:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 18:26:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-12-07 18:26:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 18:26:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-12-07 18:26:57,278 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2019-12-07 18:26:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:57,278 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-12-07 18:26:57,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-07 18:26:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-12-07 18:26:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-12-07 18:26:57,280 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:57,280 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:26:57,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:57,481 INFO L410 AbstractCegarLoop]: === Iteration 25 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:26:57,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:26:57,482 INFO L82 PathProgramCache]: Analyzing trace with hash 756414342, now seen corresponding path program 15 times [2019-12-07 18:26:57,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:26:57,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511693285] [2019-12-07 18:26:57,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:26:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:26:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 93 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:57,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511693285] [2019-12-07 18:26:57,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681256322] [2019-12-07 18:26:57,757 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:26:57,839 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-07 18:26:57,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:26:57,841 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 18:26:57,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:26:57,845 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 18:26:57,846 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:26:57,849 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:26:57,849 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:26:57,850 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:26:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 91 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:26:58,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:26:58,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 43 [2019-12-07 18:26:58,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680019110] [2019-12-07 18:26:58,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 18:26:58,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:26:58,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 18:26:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 18:26:58,245 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 44 states. [2019-12-07 18:26:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:26:59,850 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2019-12-07 18:26:59,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 18:26:59,850 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 61 [2019-12-07 18:26:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:26:59,851 INFO L225 Difference]: With dead ends: 65 [2019-12-07 18:26:59,851 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 18:26:59,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=370, Invalid=2600, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 18:26:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 18:26:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-12-07 18:26:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-07 18:26:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2019-12-07 18:26:59,853 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2019-12-07 18:26:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:26:59,853 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2019-12-07 18:26:59,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 18:26:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2019-12-07 18:26:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 18:26:59,854 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:26:59,854 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:00,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:00,055 INFO L410 AbstractCegarLoop]: === Iteration 26 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709375, now seen corresponding path program 16 times [2019-12-07 18:27:00,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:00,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743612116] [2019-12-07 18:27:00,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:00,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743612116] [2019-12-07 18:27:00,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831168818] [2019-12-07 18:27:00,426 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:00,499 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:27:00,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:00,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 18:27:00,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:00,505 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 18:27:00,505 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:00,509 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:00,509 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:00,509 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:27:00,773 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 18:27:00,774 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:00,776 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:00,776 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:00,777 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 18:27:01,213 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 18:27:01,213 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 18:27:01,219 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:01,221 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:27:01,222 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:01,223 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 18:27:01,223 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:01,227 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:01,227 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 18:27:01,227 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 18:27:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 73 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:01,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:01,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2019-12-07 18:27:01,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233861655] [2019-12-07 18:27:01,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-07 18:27:01,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-07 18:27:01,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2019-12-07 18:27:01,239 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 48 states. [2019-12-07 18:27:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:03,074 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2019-12-07 18:27:03,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 18:27:03,074 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 63 [2019-12-07 18:27:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:03,075 INFO L225 Difference]: With dead ends: 92 [2019-12-07 18:27:03,075 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 18:27:03,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=414, Invalid=4556, Unknown=0, NotChecked=0, Total=4970 [2019-12-07 18:27:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 18:27:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-12-07 18:27:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 18:27:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-12-07 18:27:03,077 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2019-12-07 18:27:03,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:03,078 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-12-07 18:27:03,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-07 18:27:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-12-07 18:27:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-12-07 18:27:03,078 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:03,078 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:03,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:03,279 INFO L410 AbstractCegarLoop]: === Iteration 27 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash 756106908, now seen corresponding path program 17 times [2019-12-07 18:27:03,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:03,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291435994] [2019-12-07 18:27:03,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 122 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:03,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291435994] [2019-12-07 18:27:03,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717803887] [2019-12-07 18:27:03,586 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:03,665 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-07 18:27:03,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:03,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 62 conjunts are in the unsatisfiable core [2019-12-07 18:27:03,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:03,671 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 18:27:03,671 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:03,677 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:03,677 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:03,677 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:27:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:04,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:04,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2019-12-07 18:27:04,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157078130] [2019-12-07 18:27:04,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-07 18:27:04,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:04,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-07 18:27:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 18:27:04,111 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 47 states. [2019-12-07 18:27:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:05,120 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2019-12-07 18:27:05,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 18:27:05,121 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 67 [2019-12-07 18:27:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:05,121 INFO L225 Difference]: With dead ends: 71 [2019-12-07 18:27:05,121 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 18:27:05,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=341, Invalid=3081, Unknown=0, NotChecked=0, Total=3422 [2019-12-07 18:27:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 18:27:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-12-07 18:27:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-07 18:27:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2019-12-07 18:27:05,124 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2019-12-07 18:27:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:05,124 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2019-12-07 18:27:05,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-07 18:27:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2019-12-07 18:27:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 18:27:05,124 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:05,125 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:05,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:05,325 INFO L410 AbstractCegarLoop]: === Iteration 28 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash 769265301, now seen corresponding path program 18 times [2019-12-07 18:27:05,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:05,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442856485] [2019-12-07 18:27:05,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:05,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442856485] [2019-12-07 18:27:05,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681608580] [2019-12-07 18:27:05,745 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:05,863 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-07 18:27:05,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:05,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 57 conjunts are in the unsatisfiable core [2019-12-07 18:27:05,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:05,870 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 18:27:05,870 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:05,874 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:05,874 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:05,874 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:27:06,179 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 16 treesize of output 12 [2019-12-07 18:27:06,179 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:06,183 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:06,183 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:06,183 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 18:27:06,804 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 25 treesize of output 19 [2019-12-07 18:27:06,805 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 18:27:06,812 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:06,814 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:27:06,815 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:06,816 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 18 treesize of output 10 [2019-12-07 18:27:06,816 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:06,821 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:06,822 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:06,822 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:40, output treesize:3 [2019-12-07 18:27:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 91 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:06,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:06,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 51 [2019-12-07 18:27:06,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247827377] [2019-12-07 18:27:06,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-12-07 18:27:06,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-12-07 18:27:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 18:27:06,838 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 51 states. [2019-12-07 18:27:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:09,962 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2019-12-07 18:27:09,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 18:27:09,963 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 69 [2019-12-07 18:27:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:09,963 INFO L225 Difference]: With dead ends: 100 [2019-12-07 18:27:09,963 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 18:27:09,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=450, Invalid=5250, Unknown=0, NotChecked=0, Total=5700 [2019-12-07 18:27:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 18:27:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-12-07 18:27:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-07 18:27:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-12-07 18:27:09,966 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2019-12-07 18:27:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:09,966 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-12-07 18:27:09,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-12-07 18:27:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-12-07 18:27:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-12-07 18:27:09,967 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:09,967 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:10,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:10,168 INFO L410 AbstractCegarLoop]: === Iteration 29 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash 674283122, now seen corresponding path program 19 times [2019-12-07 18:27:10,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:10,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649609232] [2019-12-07 18:27:10,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:10,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649609232] [2019-12-07 18:27:10,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938696438] [2019-12-07 18:27:10,514 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:10,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 65 conjunts are in the unsatisfiable core [2019-12-07 18:27:10,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 153 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:10,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:10,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 42 [2019-12-07 18:27:10,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259005631] [2019-12-07 18:27:10,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 18:27:10,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:10,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 18:27:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 18:27:10,843 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 43 states. [2019-12-07 18:27:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:11,518 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2019-12-07 18:27:11,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 18:27:11,519 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 73 [2019-12-07 18:27:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:11,519 INFO L225 Difference]: With dead ends: 77 [2019-12-07 18:27:11,519 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 18:27:11,520 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=2722, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 18:27:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 18:27:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-12-07 18:27:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-07 18:27:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2019-12-07 18:27:11,522 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2019-12-07 18:27:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:11,522 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2019-12-07 18:27:11,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 18:27:11,522 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2019-12-07 18:27:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 18:27:11,522 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:11,523 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:11,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:11,723 INFO L410 AbstractCegarLoop]: === Iteration 30 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:11,724 INFO L82 PathProgramCache]: Analyzing trace with hash -553981717, now seen corresponding path program 20 times [2019-12-07 18:27:11,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:11,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044782758] [2019-12-07 18:27:11,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:12,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044782758] [2019-12-07 18:27:12,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076746412] [2019-12-07 18:27:12,162 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:12,238 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:27:12,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:12,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 81 conjunts are in the unsatisfiable core [2019-12-07 18:27:12,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:12,556 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 18:27:12,556 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:12,560 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:12,560 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 18:27:12,560 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 18:27:12,728 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 18:27:12,728 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:12,729 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:12,729 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:12,730 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 18:27:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 11 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:12,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:12,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 46 [2019-12-07 18:27:12,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52237181] [2019-12-07 18:27:12,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-07 18:27:12,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:12,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-07 18:27:12,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1962, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 18:27:12,738 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 46 states. [2019-12-07 18:27:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:15,204 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2019-12-07 18:27:15,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 18:27:15,205 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 75 [2019-12-07 18:27:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:15,205 INFO L225 Difference]: With dead ends: 108 [2019-12-07 18:27:15,205 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 18:27:15,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=223, Invalid=3559, Unknown=0, NotChecked=0, Total=3782 [2019-12-07 18:27:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 18:27:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-12-07 18:27:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-07 18:27:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-12-07 18:27:15,207 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2019-12-07 18:27:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:15,207 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-12-07 18:27:15,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-07 18:27:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-12-07 18:27:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-12-07 18:27:15,208 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:15,208 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:15,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:15,409 INFO L410 AbstractCegarLoop]: === Iteration 31 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1309900552, now seen corresponding path program 21 times [2019-12-07 18:27:15,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:15,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618081300] [2019-12-07 18:27:15,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 192 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:15,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618081300] [2019-12-07 18:27:15,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860555421] [2019-12-07 18:27:15,771 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:15,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-07 18:27:15,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:15,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 62 conjunts are in the unsatisfiable core [2019-12-07 18:27:15,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:15,905 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 18:27:15,905 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:15,909 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:15,909 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:15,909 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:27:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:16,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:16,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 55 [2019-12-07 18:27:16,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028868127] [2019-12-07 18:27:16,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-12-07 18:27:16,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:16,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-12-07 18:27:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2711, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 18:27:16,521 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 56 states. [2019-12-07 18:27:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:18,771 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2019-12-07 18:27:18,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 18:27:18,772 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 79 [2019-12-07 18:27:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:18,774 INFO L225 Difference]: With dead ends: 83 [2019-12-07 18:27:18,774 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 18:27:18,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=574, Invalid=4256, Unknown=0, NotChecked=0, Total=4830 [2019-12-07 18:27:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 18:27:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-12-07 18:27:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-07 18:27:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2019-12-07 18:27:18,779 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2019-12-07 18:27:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:18,779 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2019-12-07 18:27:18,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-12-07 18:27:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2019-12-07 18:27:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 18:27:18,780 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:18,781 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:18,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:18,982 INFO L410 AbstractCegarLoop]: === Iteration 32 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash 389012481, now seen corresponding path program 22 times [2019-12-07 18:27:18,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:18,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660224828] [2019-12-07 18:27:18,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:19,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660224828] [2019-12-07 18:27:19,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041627400] [2019-12-07 18:27:19,516 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:19,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:27:19,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:19,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 65 conjunts are in the unsatisfiable core [2019-12-07 18:27:19,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:19,596 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 18:27:19,597 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:19,600 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:19,601 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:19,601 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:27:20,017 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 18:27:20,017 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:20,020 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:20,020 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:20,020 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 18:27:20,704 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 18:27:20,704 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 18:27:20,711 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:20,713 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:27:20,714 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:20,714 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 18:27:20,715 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:20,719 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:20,719 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 18:27:20,719 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 18:27:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 133 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:20,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:20,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 60 [2019-12-07 18:27:20,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367798543] [2019-12-07 18:27:20,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-12-07 18:27:20,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:20,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-12-07 18:27:20,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3278, Unknown=0, NotChecked=0, Total=3540 [2019-12-07 18:27:20,738 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 60 states. [2019-12-07 18:27:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:25,757 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2019-12-07 18:27:25,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 18:27:25,758 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 81 [2019-12-07 18:27:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:25,760 INFO L225 Difference]: With dead ends: 116 [2019-12-07 18:27:25,760 INFO L226 Difference]: Without dead ends: 89 [2019-12-07 18:27:25,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=603, Invalid=7229, Unknown=0, NotChecked=0, Total=7832 [2019-12-07 18:27:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-07 18:27:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-12-07 18:27:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 18:27:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-12-07 18:27:25,768 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2019-12-07 18:27:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:25,768 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-12-07 18:27:25,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-12-07 18:27:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-12-07 18:27:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-12-07 18:27:25,771 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:25,771 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:25,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:25,973 INFO L410 AbstractCegarLoop]: === Iteration 33 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1189828514, now seen corresponding path program 23 times [2019-12-07 18:27:25,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:25,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094915603] [2019-12-07 18:27:25,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 233 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:26,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094915603] [2019-12-07 18:27:26,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696160368] [2019-12-07 18:27:26,397 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:26,527 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-12-07 18:27:26,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:26,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 81 conjunts are in the unsatisfiable core [2019-12-07 18:27:26,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:26,535 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 18:27:26,535 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:26,539 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:26,539 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:26,539 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:27:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:26,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:26,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 45 [2019-12-07 18:27:26,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365817914] [2019-12-07 18:27:26,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-07 18:27:26,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-07 18:27:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 18:27:26,920 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 46 states. [2019-12-07 18:27:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:28,587 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2019-12-07 18:27:28,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 18:27:28,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 85 [2019-12-07 18:27:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:28,588 INFO L225 Difference]: With dead ends: 89 [2019-12-07 18:27:28,588 INFO L226 Difference]: Without dead ends: 89 [2019-12-07 18:27:28,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2019-12-07 18:27:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-07 18:27:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-12-07 18:27:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-07 18:27:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2019-12-07 18:27:28,590 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2019-12-07 18:27:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:28,590 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2019-12-07 18:27:28,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-07 18:27:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2019-12-07 18:27:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 18:27:28,591 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:28,591 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:28,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:28,792 INFO L410 AbstractCegarLoop]: === Iteration 34 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:28,792 INFO L82 PathProgramCache]: Analyzing trace with hash -963901481, now seen corresponding path program 24 times [2019-12-07 18:27:28,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:28,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547554158] [2019-12-07 18:27:28,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:29,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547554158] [2019-12-07 18:27:29,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420668183] [2019-12-07 18:27:29,327 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:29,506 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-12-07 18:27:29,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:29,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 93 conjunts are in the unsatisfiable core [2019-12-07 18:27:29,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:29,905 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 18:27:29,905 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:29,909 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:29,909 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 18:27:29,909 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 18:27:30,085 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 18:27:30,085 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:30,086 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:30,086 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:30,086 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 18:27:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 13 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:30,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:30,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 52 [2019-12-07 18:27:30,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57652029] [2019-12-07 18:27:30,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-12-07 18:27:30,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:30,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-12-07 18:27:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2530, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 18:27:30,096 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 52 states. [2019-12-07 18:27:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:33,812 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2019-12-07 18:27:33,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-07 18:27:33,812 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 87 [2019-12-07 18:27:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:33,813 INFO L225 Difference]: With dead ends: 124 [2019-12-07 18:27:33,813 INFO L226 Difference]: Without dead ends: 95 [2019-12-07 18:27:33,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=251, Invalid=4579, Unknown=0, NotChecked=0, Total=4830 [2019-12-07 18:27:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-07 18:27:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2019-12-07 18:27:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-07 18:27:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2019-12-07 18:27:33,815 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2019-12-07 18:27:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:33,815 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2019-12-07 18:27:33,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-12-07 18:27:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2019-12-07 18:27:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-12-07 18:27:33,816 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:33,816 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:34,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:34,017 INFO L410 AbstractCegarLoop]: === Iteration 35 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash 474700404, now seen corresponding path program 25 times [2019-12-07 18:27:34,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:34,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977804932] [2019-12-07 18:27:34,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 278 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:34,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977804932] [2019-12-07 18:27:34,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086387500] [2019-12-07 18:27:34,480 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:34,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 80 conjunts are in the unsatisfiable core [2019-12-07 18:27:34,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:34,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:34,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 51 [2019-12-07 18:27:34,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332857867] [2019-12-07 18:27:34,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-12-07 18:27:34,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-12-07 18:27:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=2282, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 18:27:34,930 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 52 states. [2019-12-07 18:27:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:35,855 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2019-12-07 18:27:35,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 18:27:35,855 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 91 [2019-12-07 18:27:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:35,856 INFO L225 Difference]: With dead ends: 95 [2019-12-07 18:27:35,856 INFO L226 Difference]: Without dead ends: 95 [2019-12-07 18:27:35,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=508, Invalid=4048, Unknown=0, NotChecked=0, Total=4556 [2019-12-07 18:27:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-07 18:27:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-12-07 18:27:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-07 18:27:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2019-12-07 18:27:35,858 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2019-12-07 18:27:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:35,858 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2019-12-07 18:27:35,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-12-07 18:27:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2019-12-07 18:27:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-12-07 18:27:35,859 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:35,859 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:36,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:36,059 INFO L410 AbstractCegarLoop]: === Iteration 36 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:36,060 INFO L82 PathProgramCache]: Analyzing trace with hash 920554605, now seen corresponding path program 26 times [2019-12-07 18:27:36,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:36,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483331934] [2019-12-07 18:27:36,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:36,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483331934] [2019-12-07 18:27:36,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514482823] [2019-12-07 18:27:36,683 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:36,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:27:36,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:36,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 99 conjunts are in the unsatisfiable core [2019-12-07 18:27:36,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:37,211 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 14 treesize of output 10 [2019-12-07 18:27:37,211 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:37,214 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:37,214 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 18:27:37,215 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 18:27:37,395 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 18:27:37,395 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:37,397 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:37,397 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:37,397 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 18:27:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:37,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:37,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 55 [2019-12-07 18:27:37,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575323320] [2019-12-07 18:27:37,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-12-07 18:27:37,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-12-07 18:27:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2841, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 18:27:37,408 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 55 states. [2019-12-07 18:27:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:41,505 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2019-12-07 18:27:41,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 18:27:41,506 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 93 [2019-12-07 18:27:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:41,507 INFO L225 Difference]: With dead ends: 132 [2019-12-07 18:27:41,507 INFO L226 Difference]: Without dead ends: 101 [2019-12-07 18:27:41,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=265, Invalid=5137, Unknown=0, NotChecked=0, Total=5402 [2019-12-07 18:27:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-07 18:27:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-12-07 18:27:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-07 18:27:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2019-12-07 18:27:41,512 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2019-12-07 18:27:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:41,512 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2019-12-07 18:27:41,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-12-07 18:27:41,512 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2019-12-07 18:27:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-12-07 18:27:41,513 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:41,513 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:41,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:41,714 INFO L410 AbstractCegarLoop]: === Iteration 37 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:41,715 INFO L82 PathProgramCache]: Analyzing trace with hash 831173962, now seen corresponding path program 27 times [2019-12-07 18:27:41,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:41,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510702915] [2019-12-07 18:27:41,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 327 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:42,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510702915] [2019-12-07 18:27:42,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236099622] [2019-12-07 18:27:42,409 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:42,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-07 18:27:42,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:42,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 72 conjunts are in the unsatisfiable core [2019-12-07 18:27:42,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 325 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:43,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:43,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 68 [2019-12-07 18:27:43,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819417643] [2019-12-07 18:27:43,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-12-07 18:27:43,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:43,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-12-07 18:27:43,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=4025, Unknown=0, NotChecked=0, Total=4692 [2019-12-07 18:27:43,426 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 69 states. [2019-12-07 18:27:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:46,722 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2019-12-07 18:27:46,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-07 18:27:46,722 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 97 [2019-12-07 18:27:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:46,723 INFO L225 Difference]: With dead ends: 101 [2019-12-07 18:27:46,723 INFO L226 Difference]: Without dead ends: 101 [2019-12-07 18:27:46,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=945, Invalid=6365, Unknown=0, NotChecked=0, Total=7310 [2019-12-07 18:27:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-07 18:27:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-12-07 18:27:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-07 18:27:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2019-12-07 18:27:46,725 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2019-12-07 18:27:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:46,725 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2019-12-07 18:27:46,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-12-07 18:27:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2019-12-07 18:27:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 18:27:46,726 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:46,726 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:46,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:46,927 INFO L410 AbstractCegarLoop]: === Iteration 38 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash -105739837, now seen corresponding path program 28 times [2019-12-07 18:27:46,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:46,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91229417] [2019-12-07 18:27:46,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 15 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:47,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91229417] [2019-12-07 18:27:47,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924926801] [2019-12-07 18:27:47,595 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:47,669 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:27:47,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:47,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 77 conjunts are in the unsatisfiable core [2019-12-07 18:27:47,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:47,675 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 18:27:47,675 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:47,678 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:47,678 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:47,678 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:27:48,289 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 18:27:48,289 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:48,292 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:48,292 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:48,292 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 18:27:49,449 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 18:27:49,449 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 18:27:49,456 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:49,458 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:27:49,459 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:49,460 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 18:27:49,460 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:49,465 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:49,465 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 18:27:49,465 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 18:27:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 211 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:49,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:49,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2019-12-07 18:27:49,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299379103] [2019-12-07 18:27:49,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-12-07 18:27:49,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-12-07 18:27:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=4745, Unknown=0, NotChecked=0, Total=5112 [2019-12-07 18:27:49,493 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 72 states. [2019-12-07 18:27:53,278 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-12-07 18:27:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:54,766 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2019-12-07 18:27:54,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-07 18:27:54,766 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 99 [2019-12-07 18:27:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:54,767 INFO L225 Difference]: With dead ends: 140 [2019-12-07 18:27:54,767 INFO L226 Difference]: Without dead ends: 107 [2019-12-07 18:27:54,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=828, Invalid=10514, Unknown=0, NotChecked=0, Total=11342 [2019-12-07 18:27:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-07 18:27:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2019-12-07 18:27:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-07 18:27:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2019-12-07 18:27:54,769 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2019-12-07 18:27:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:54,769 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2019-12-07 18:27:54,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-12-07 18:27:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2019-12-07 18:27:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-12-07 18:27:54,770 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:54,770 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:54,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:54,971 INFO L410 AbstractCegarLoop]: === Iteration 39 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash -413017888, now seen corresponding path program 29 times [2019-12-07 18:27:54,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:54,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613707548] [2019-12-07 18:27:54,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 380 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:55,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613707548] [2019-12-07 18:27:55,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490132731] [2019-12-07 18:27:55,526 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:55,676 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-12-07 18:27:55,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:27:55,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 96 conjunts are in the unsatisfiable core [2019-12-07 18:27:55,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:27:55,683 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 18:27:55,684 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:27:55,687 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:27:55,687 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:27:55,687 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:27:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 378 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:56,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:27:56,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34] total 52 [2019-12-07 18:27:56,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954813686] [2019-12-07 18:27:56,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-12-07 18:27:56,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:27:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-12-07 18:27:56,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2019-12-07 18:27:56,141 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 53 states. [2019-12-07 18:27:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:27:58,981 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2019-12-07 18:27:58,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 18:27:58,982 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 103 [2019-12-07 18:27:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:27:58,984 INFO L225 Difference]: With dead ends: 107 [2019-12-07 18:27:58,984 INFO L226 Difference]: Without dead ends: 107 [2019-12-07 18:27:58,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=375, Invalid=4595, Unknown=0, NotChecked=0, Total=4970 [2019-12-07 18:27:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-07 18:27:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-12-07 18:27:58,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-07 18:27:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2019-12-07 18:27:58,990 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2019-12-07 18:27:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:27:58,991 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2019-12-07 18:27:58,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-12-07 18:27:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2019-12-07 18:27:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 18:27:58,992 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:27:58,993 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:27:59,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:27:59,194 INFO L410 AbstractCegarLoop]: === Iteration 40 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:27:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:27:59,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1773199399, now seen corresponding path program 30 times [2019-12-07 18:27:59,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:27:59,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519397118] [2019-12-07 18:27:59,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:27:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:27:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 16 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:27:59,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519397118] [2019-12-07 18:27:59,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774996213] [2019-12-07 18:27:59,938 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:00,312 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-12-07 18:28:00,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:00,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 53 conjunts are in the unsatisfiable core [2019-12-07 18:28:00,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:00,318 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 18:28:00,319 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:28:00,321 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:28:00,322 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:28:00,322 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-12-07 18:28:00,359 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 16 treesize of output 12 [2019-12-07 18:28:00,359 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:28:00,364 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:28:00,365 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 18:28:00,365 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2019-12-07 18:28:00,540 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:28:00,541 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 20 treesize of output 20 [2019-12-07 18:28:00,541 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:28:00,549 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:28:00,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:28:00,551 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 18:28:00,552 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2019-12-07 18:28:00,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:28:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2019-12-07 18:28:00,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:00,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 7] total 46 [2019-12-07 18:28:00,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606368356] [2019-12-07 18:28:00,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-12-07 18:28:00,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:00,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-12-07 18:28:00,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 18:28:00,681 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 46 states. [2019-12-07 18:28:03,318 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-12-07 18:28:06,169 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-12-07 18:28:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:06,935 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2019-12-07 18:28:06,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-12-07 18:28:06,935 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 105 [2019-12-07 18:28:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:06,935 INFO L225 Difference]: With dead ends: 147 [2019-12-07 18:28:06,935 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:28:06,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=669, Invalid=10043, Unknown=0, NotChecked=0, Total=10712 [2019-12-07 18:28:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:28:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:28:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:28:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:28:06,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2019-12-07 18:28:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:06,936 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:28:06,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-12-07 18:28:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:28:06,936 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:28:07,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:07,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:28:07 BoogieIcfgContainer [2019-12-07 18:28:07,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:28:07,143 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:28:07,143 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:28:07,143 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:28:07,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:26:37" (3/4) ... [2019-12-07 18:28:07,146 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:28:07,150 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-12-07 18:28:07,150 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-12-07 18:28:07,150 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-12-07 18:28:07,150 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-12-07 18:28:07,150 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-12-07 18:28:07,150 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2019-12-07 18:28:07,150 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-12-07 18:28:07,150 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-12-07 18:28:07,153 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2019-12-07 18:28:07,153 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 18:28:07,153 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 18:28:07,153 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 18:28:07,178 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d342064f-6bb3-4cd9-9153-beb1bfde5a43/bin/uautomizer/witness.graphml [2019-12-07 18:28:07,178 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:28:07,179 INFO L168 Benchmark]: Toolchain (without parser) took 90109.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 181.9 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -120.4 MB). Peak memory consumption was 61.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:07,179 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:28:07,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -155.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:07,179 INFO L168 Benchmark]: Boogie Preprocessor took 35.14 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 18:28:07,180 INFO L168 Benchmark]: RCFGBuilder took 281.11 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: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:07,180 INFO L168 Benchmark]: TraceAbstraction took 89455.26 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 75.5 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -25.9 MB). Peak memory consumption was 49.6 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:07,180 INFO L168 Benchmark]: Witness Printer took 34.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:07,181 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 300.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -155.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.14 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 281.11 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: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 89455.26 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 75.5 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -25.9 MB). Peak memory consumption was 49.6 MB. Max. memory is 11.5 GB. * Witness Printer took 34.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: 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: 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 - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 47 locations, 7 error locations. Result: SAFE, OverallTime: 89.4s, OverallIterations: 40, TraceHistogramMax: 16, AutomataDifference: 55.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 655 SDtfs, 2268 SDslu, 9749 SDs, 0 SdLazy, 41591 SolverSat, 995 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3182 GetRequests, 1460 SyntacticMatches, 29 SemanticMatches, 1693 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18777 ImplicationChecksByTransitivity, 46.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 40 MinimizatonAttempts, 95 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 23.5s InterpolantComputationTime, 3863 NumberOfCodeBlocks, 3818 NumberOfCodeBlocksAsserted, 211 NumberOfCheckSat, 3792 ConstructedInterpolants, 84 QuantifiedInterpolants, 2595531 SizeOfPredicates, 271 NumberOfNonLiveVariables, 7407 ConjunctsInSsa, 1721 ConjunctsInUnsatCore, 71 InterpolantComputations, 9 PerfectInterpolantSequences, 5242/14916 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...