./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 cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 0.1.24-cad4683 [2019-10-22 09:02:02,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:02:02,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:02:02,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:02:02,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:02:02,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:02:02,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:02:02,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:02:02,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:02:02,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:02:02,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:02:02,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:02:02,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:02:02,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:02:02,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:02:02,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:02:02,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:02:02,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:02:02,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:02:02,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:02:02,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:02:02,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:02:02,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:02:02,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:02:02,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:02:02,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:02:02,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:02:02,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:02:02,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:02:02,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:02:02,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:02:02,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:02:02,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:02:02,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:02:02,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:02:02,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:02:02,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:02:02,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:02:02,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:02:02,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:02:02,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:02:02,350 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-10-22 09:02:02,363 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:02:02,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:02:02,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:02:02,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:02:02,365 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:02:02,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:02:02,365 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:02:02,365 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 09:02:02,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:02:02,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:02:02,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:02:02,367 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 09:02:02,367 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 09:02:02,367 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 09:02:02,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:02:02,367 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:02:02,368 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:02:02,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:02:02,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:02:02,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:02:02,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:02:02,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:02:02,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:02:02,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:02:02,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:02:02,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:02:02,370 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/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:02,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:02:02,427 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:02:02,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:02:02,432 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:02:02,432 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:02:02,433 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2019-10-22 09:02:02,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/data/9c3fae755/6ea4682aab494f3889b393cda204b178/FLAGa1ab020d5 [2019-10-22 09:02:02,944 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:02:02,944 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2019-10-22 09:02:02,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/data/9c3fae755/6ea4682aab494f3889b393cda204b178/FLAGa1ab020d5 [2019-10-22 09:02:03,460 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/data/9c3fae755/6ea4682aab494f3889b393cda204b178 [2019-10-22 09:02:03,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:02:03,464 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-10-22 09:02:03,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:03,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:02:03,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:02:03,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:03" (1/1) ... [2019-10-22 09:02:03,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a364238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:03, skipping insertion in model container [2019-10-22 09:02:03,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:03" (1/1) ... [2019-10-22 09:02:03,482 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:02:03,519 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:02:04,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:04,043 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:02:04,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:04,148 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:02:04,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04 WrapperNode [2019-10-22 09:02:04,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:04,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:02:04,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:02:04,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:02:04,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (1/1) ... [2019-10-22 09:02:04,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (1/1) ... [2019-10-22 09:02:04,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (1/1) ... [2019-10-22 09:02:04,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (1/1) ... [2019-10-22 09:02:04,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (1/1) ... [2019-10-22 09:02:04,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (1/1) ... [2019-10-22 09:02:04,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (1/1) ... [2019-10-22 09:02:04,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:02:04,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:02:04,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:02:04,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:02:04,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:04,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-22 09:02:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:02:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-22 09:02:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-22 09:02:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-22 09:02:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-22 09:02:04,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-22 09:02:04,273 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2019-10-22 09:02:04,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-22 09:02:04,273 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-22 09:02:04,273 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-22 09:02:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-22 09:02:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-22 09:02:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-22 09:02:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-22 09:02:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-22 09:02:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-22 09:02:04,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-22 09:02:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-22 09:02:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-22 09:02:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-22 09:02:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-22 09:02:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-22 09:02:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-22 09:02:04,275 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-22 09:02:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-22 09:02:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-22 09:02:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-22 09:02:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-22 09:02:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-22 09:02:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-22 09:02:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-22 09:02:04,276 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-22 09:02:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-22 09:02:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-22 09:02:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-22 09:02:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-22 09:02:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-22 09:02:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-22 09:02:04,277 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-22 09:02:04,280 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-22 09:02:04,280 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-22 09:02:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-22 09:02:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-22 09:02:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-22 09:02:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-22 09:02:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-22 09:02:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-22 09:02:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-22 09:02:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-22 09:02:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-22 09:02:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-22 09:02:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-22 09:02:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-22 09:02:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-22 09:02:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-22 09:02:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-22 09:02:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-22 09:02:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-22 09:02:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-22 09:02:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-22 09:02:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-22 09:02:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-22 09:02:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-22 09:02:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-22 09:02:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-22 09:02:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-22 09:02:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-22 09:02:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-22 09:02:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-22 09:02:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-22 09:02:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-22 09:02:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-22 09:02:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-22 09:02:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-22 09:02:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-22 09:02:04,285 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-22 09:02:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-22 09:02:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-22 09:02:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-22 09:02:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-22 09:02:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-22 09:02:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-22 09:02:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-22 09:02:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-22 09:02:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-22 09:02:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-22 09:02:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-22 09:02:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-22 09:02:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-22 09:02:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-22 09:02:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-22 09:02:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-22 09:02:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-22 09:02:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-22 09:02:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-22 09:02:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-22 09:02:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-22 09:02:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-22 09:02:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-22 09:02:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-22 09:02:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-22 09:02:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-22 09:02:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-22 09:02:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-22 09:02:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-22 09:02:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-22 09:02:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-22 09:02:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-22 09:02:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-22 09:02:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-22 09:02:04,295 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-22 09:02:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-22 09:02:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-22 09:02:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-22 09:02:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-22 09:02:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-22 09:02:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-22 09:02:04,296 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2019-10-22 09:02:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 09:02:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-22 09:02:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 09:02:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 09:02:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:02:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-22 09:02:04,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:02:04,714 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:02:04,714 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-22 09:02:04,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:04 BoogieIcfgContainer [2019-10-22 09:02:04,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:02:04,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:02:04,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:02:04,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:02:04,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:02:03" (1/3) ... [2019-10-22 09:02:04,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563b1aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:02:04, skipping insertion in model container [2019-10-22 09:02:04,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:04" (2/3) ... [2019-10-22 09:02:04,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563b1aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:02:04, skipping insertion in model container [2019-10-22 09:02:04,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:04" (3/3) ... [2019-10-22 09:02:04,728 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2019-10-22 09:02:04,740 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:02:04,749 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-10-22 09:02:04,761 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-10-22 09:02:04,789 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:02:04,789 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 09:02:04,789 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:02:04,790 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:02:04,790 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:02:04,791 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:02:04,791 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:02:04,791 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:02:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-22 09:02:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:02:04,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:04,825 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:04,828 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:04,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341813, now seen corresponding path program 1 times [2019-10-22 09:02:04,845 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:04,846 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740043198] [2019-10-22 09:02:04,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:04,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:04,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:05,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740043198] [2019-10-22 09:02:05,091 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:05,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:02:05,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297407821] [2019-10-22 09:02:05,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:02:05,098 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:02:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:02:05,115 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2019-10-22 09:02:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:05,234 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-22 09:02:05,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:02:05,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-10-22 09:02:05,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:05,247 INFO L225 Difference]: With dead ends: 30 [2019-10-22 09:02:05,247 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 09:02:05,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:02:05,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 09:02:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-22 09:02:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 09:02:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-22 09:02:05,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2019-10-22 09:02:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:05,290 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-22 09:02:05,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:02:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-22 09:02:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:02:05,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:05,291 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:05,291 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341814, now seen corresponding path program 1 times [2019-10-22 09:02:05,292 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:05,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373990338] [2019-10-22 09:02:05,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:05,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:05,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:05,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373990338] [2019-10-22 09:02:05,385 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:05,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:02:05,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261911751] [2019-10-22 09:02:05,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:02:05,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:05,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:02:05,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:02:05,388 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2019-10-22 09:02:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:05,501 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-10-22 09:02:05,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:02:05,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-22 09:02:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:05,503 INFO L225 Difference]: With dead ends: 26 [2019-10-22 09:02:05,503 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:02:05,504 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:02:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:02:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 09:02:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:02:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-22 09:02:05,508 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2019-10-22 09:02:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:05,508 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-22 09:02:05,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:02:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-22 09:02:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:02:05,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:05,509 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:05,510 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1480341867, now seen corresponding path program 1 times [2019-10-22 09:02:05,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:05,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942351101] [2019-10-22 09:02:05,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:05,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:05,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:05,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942351101] [2019-10-22 09:02:05,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:05,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:02:05,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061147830] [2019-10-22 09:02:05,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:02:05,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:02:05,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:02:05,571 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2019-10-22 09:02:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:05,677 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-22 09:02:05,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:02:05,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-22 09:02:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:05,680 INFO L225 Difference]: With dead ends: 33 [2019-10-22 09:02:05,680 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 09:02:05,681 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:02:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 09:02:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-10-22 09:02:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 09:02:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-22 09:02:05,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2019-10-22 09:02:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:05,690 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-22 09:02:05,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:02:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-22 09:02:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:02:05,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:05,691 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:05,691 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:05,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1480401449, now seen corresponding path program 1 times [2019-10-22 09:02:05,692 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:05,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716907818] [2019-10-22 09:02:05,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:05,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:05,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:05,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716907818] [2019-10-22 09:02:05,765 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:05,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:02:05,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569701352] [2019-10-22 09:02:05,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:02:05,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:02:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:02:05,775 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2019-10-22 09:02:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:05,893 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2019-10-22 09:02:05,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:02:05,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-22 09:02:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:05,894 INFO L225 Difference]: With dead ends: 37 [2019-10-22 09:02:05,895 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 09:02:05,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:02:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 09:02:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-10-22 09:02:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 09:02:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-10-22 09:02:05,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 10 [2019-10-22 09:02:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:05,901 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-10-22 09:02:05,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:02:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-22 09:02:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 09:02:05,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:05,902 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:05,903 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:05,903 INFO L82 PathProgramCache]: Analyzing trace with hash 138789715, now seen corresponding path program 1 times [2019-10-22 09:02:05,903 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:05,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210597774] [2019-10-22 09:02:05,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:05,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:05,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:06,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210597774] [2019-10-22 09:02:06,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:06,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:02:06,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033243337] [2019-10-22 09:02:06,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:02:06,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:06,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:02:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:02:06,043 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2019-10-22 09:02:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:06,172 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-22 09:02:06,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:02:06,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-22 09:02:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:06,173 INFO L225 Difference]: With dead ends: 29 [2019-10-22 09:02:06,173 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:02:06,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:02:06,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:02:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 09:02:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 09:02:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-22 09:02:06,180 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2019-10-22 09:02:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:06,180 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-22 09:02:06,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:02:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-22 09:02:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 09:02:06,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:06,181 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:06,182 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:06,182 INFO L82 PathProgramCache]: Analyzing trace with hash 138789716, now seen corresponding path program 1 times [2019-10-22 09:02:06,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:06,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814088370] [2019-10-22 09:02:06,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:06,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:06,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:06,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814088370] [2019-10-22 09:02:06,327 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:06,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 09:02:06,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568382768] [2019-10-22 09:02:06,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:02:06,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:06,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:02:06,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:02:06,329 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2019-10-22 09:02:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:06,524 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-22 09:02:06,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:02:06,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-10-22 09:02:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:06,528 INFO L225 Difference]: With dead ends: 34 [2019-10-22 09:02:06,528 INFO L226 Difference]: Without dead ends: 34 [2019-10-22 09:02:06,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:02:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-22 09:02:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-10-22 09:02:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 09:02:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-10-22 09:02:06,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2019-10-22 09:02:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:06,539 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-10-22 09:02:06,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:02:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-22 09:02:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 09:02:06,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:06,540 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:06,540 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash 232930637, now seen corresponding path program 1 times [2019-10-22 09:02:06,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:06,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778012918] [2019-10-22 09:02:06,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:06,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:06,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:06,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778012918] [2019-10-22 09:02:06,712 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:06,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-22 09:02:06,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259626993] [2019-10-22 09:02:06,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:02:06,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:02:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:02:06,713 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2019-10-22 09:02:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:06,933 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-10-22 09:02:06,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:02:06,934 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-10-22 09:02:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:06,935 INFO L225 Difference]: With dead ends: 41 [2019-10-22 09:02:06,935 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 09:02:06,935 INFO L600 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 [2019-10-22 09:02:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 09:02:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-22 09:02:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 09:02:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-10-22 09:02:06,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2019-10-22 09:02:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:06,940 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-10-22 09:02:06,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:02:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-10-22 09:02:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 09:02:06,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:06,942 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:06,942 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash 912989007, now seen corresponding path program 1 times [2019-10-22 09:02:06,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:06,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29896195] [2019-10-22 09:02:06,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:06,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:06,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:07,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29896195] [2019-10-22 09:02:07,090 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:07,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-22 09:02:07,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016800140] [2019-10-22 09:02:07,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:02:07,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:02:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:02:07,091 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2019-10-22 09:02:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:07,347 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-10-22 09:02:07,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:02:07,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-22 09:02:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:07,349 INFO L225 Difference]: With dead ends: 51 [2019-10-22 09:02:07,349 INFO L226 Difference]: Without dead ends: 51 [2019-10-22 09:02:07,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:02:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-22 09:02:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2019-10-22 09:02:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 09:02:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-10-22 09:02:07,354 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 15 [2019-10-22 09:02:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:07,355 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-10-22 09:02:07,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:02:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-10-22 09:02:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:02:07,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:07,356 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:07,356 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -754029460, now seen corresponding path program 1 times [2019-10-22 09:02:07,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:07,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349915905] [2019-10-22 09:02:07,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:07,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:07,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:07,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349915905] [2019-10-22 09:02:07,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042758258] [2019-10-22 09:02:07,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:07,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:02:07,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:07,705 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-22 09:02:07,705 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:07,720 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:07,721 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:07,721 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 09:02:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:07,740 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:07,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-10-22 09:02:07,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44758545] [2019-10-22 09:02:07,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:02:07,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:02:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:02:07,741 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 7 states. [2019-10-22 09:02:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:07,849 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-10-22 09:02:07,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:02:07,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-22 09:02:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:07,851 INFO L225 Difference]: With dead ends: 42 [2019-10-22 09:02:07,851 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 09:02:07,851 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:02:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 09:02:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2019-10-22 09:02:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 09:02:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-10-22 09:02:07,856 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2019-10-22 09:02:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:07,857 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-10-22 09:02:07,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:02:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-10-22 09:02:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:02:07,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:07,858 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:08,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:08,059 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:08,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:08,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1444358493, now seen corresponding path program 1 times [2019-10-22 09:02:08,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:08,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972737928] [2019-10-22 09:02:08,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:08,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:08,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:08,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972737928] [2019-10-22 09:02:08,150 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:08,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:02:08,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533870532] [2019-10-22 09:02:08,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:02:08,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:02:08,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:02:08,151 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 5 states. [2019-10-22 09:02:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:08,202 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2019-10-22 09:02:08,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:02:08,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-22 09:02:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:08,203 INFO L225 Difference]: With dead ends: 35 [2019-10-22 09:02:08,203 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 09:02:08,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:02:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 09:02:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 09:02:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 09:02:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 09:02:08,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2019-10-22 09:02:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:08,206 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 09:02:08,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:02:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 09:02:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:02:08,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:08,207 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:08,207 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:08,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1892891924, now seen corresponding path program 1 times [2019-10-22 09:02:08,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:08,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103426783] [2019-10-22 09:02:08,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:08,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:08,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:08,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103426783] [2019-10-22 09:02:08,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649746256] [2019-10-22 09:02:08,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:08,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:02:08,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:08,511 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:08,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-10-22 09:02:08,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103860948] [2019-10-22 09:02:08,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 09:02:08,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:08,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 09:02:08,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:02:08,513 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 16 states. [2019-10-22 09:02:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:08,705 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-10-22 09:02:08,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:02:08,706 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-10-22 09:02:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:08,706 INFO L225 Difference]: With dead ends: 23 [2019-10-22 09:02:08,706 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 09:02:08,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:02:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 09:02:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-10-22 09:02:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 09:02:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-10-22 09:02:08,708 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-10-22 09:02:08,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:08,708 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-10-22 09:02:08,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 09:02:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-10-22 09:02:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 09:02:08,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:08,709 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:08,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:08,910 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:08,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1996994277, now seen corresponding path program 2 times [2019-10-22 09:02:08,910 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:08,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742899529] [2019-10-22 09:02:08,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:08,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:08,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:09,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742899529] [2019-10-22 09:02:09,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522060498] [2019-10-22 09:02:09,179 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:09,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:02:09,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:09,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-22 09:02:09,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:09,372 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-10-22 09:02:09,372 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:09,379 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:09,379 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 09:02:09,380 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-10-22 09:02:09,529 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:09,529 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-10-22 09:02:09,530 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-22 09:02:09,543 INFO L567 ElimStorePlain]: treesize reduction 8, result has 55.6 percent of original size [2019-10-22 09:02:09,544 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:09,544 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2019-10-22 09:02:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:09,567 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:09,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-10-22 09:02:09,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64451803] [2019-10-22 09:02:09,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:02:09,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:09,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:02:09,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:02:09,569 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 21 states. [2019-10-22 09:02:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:10,035 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-22 09:02:10,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:02:10,035 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2019-10-22 09:02:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:10,036 INFO L225 Difference]: With dead ends: 36 [2019-10-22 09:02:10,036 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:02:10,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2019-10-22 09:02:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:02:10,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-10-22 09:02:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:02:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 09:02:10,040 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2019-10-22 09:02:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:10,040 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 09:02:10,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:02:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 09:02:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 09:02:10,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:10,041 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:10,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:10,242 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:10,242 INFO L82 PathProgramCache]: Analyzing trace with hash 484603074, now seen corresponding path program 3 times [2019-10-22 09:02:10,242 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:10,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414668663] [2019-10-22 09:02:10,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:10,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:10,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:10,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414668663] [2019-10-22 09:02:10,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684065712] [2019-10-22 09:02:10,410 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:10,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 09:02:10,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:10,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-22 09:02:10,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:10,635 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:10,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2019-10-22 09:02:10,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128970859] [2019-10-22 09:02:10,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 09:02:10,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 09:02:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:02:10,637 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 18 states. [2019-10-22 09:02:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:10,886 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-10-22 09:02:10,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:02:10,886 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-22 09:02:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:10,887 INFO L225 Difference]: With dead ends: 29 [2019-10-22 09:02:10,887 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:02:10,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:02:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:02:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-22 09:02:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 09:02:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-10-22 09:02:10,890 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-10-22 09:02:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:10,890 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-10-22 09:02:10,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 09:02:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-10-22 09:02:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 09:02:10,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:10,891 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:11,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:11,092 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1847085883, now seen corresponding path program 4 times [2019-10-22 09:02:11,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:11,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595624002] [2019-10-22 09:02:11,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:11,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:11,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:11,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595624002] [2019-10-22 09:02:11,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920713221] [2019-10-22 09:02:11,365 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:11,450 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:02:11,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:11,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-22 09:02:11,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:11,461 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-22 09:02:11,461 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:11,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:11,465 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:11,466 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 09:02:11,540 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-22 09:02:11,540 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:11,543 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:11,544 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:11,544 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-10-22 09:02:11,728 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2019-10-22 09:02:11,729 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 09:02:11,737 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:11,741 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-22 09:02:11,742 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:11,743 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-10-22 09:02:11,743 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:11,748 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:11,749 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:11,749 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-10-22 09:02:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:11,751 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:11,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2019-10-22 09:02:11,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655165495] [2019-10-22 09:02:11,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 09:02:11,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 09:02:11,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:02:11,753 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 24 states. [2019-10-22 09:02:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:12,346 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-10-22 09:02:12,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:02:12,347 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-10-22 09:02:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:12,347 INFO L225 Difference]: With dead ends: 44 [2019-10-22 09:02:12,347 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:02:12,348 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2019-10-22 09:02:12,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:02:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-22 09:02:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 09:02:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-22 09:02:12,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2019-10-22 09:02:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:12,351 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-22 09:02:12,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 09:02:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-22 09:02:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 09:02:12,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:12,352 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:12,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:12,553 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1827827544, now seen corresponding path program 5 times [2019-10-22 09:02:12,553 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:12,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736748391] [2019-10-22 09:02:12,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:12,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:12,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:12,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736748391] [2019-10-22 09:02:12,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837923995] [2019-10-22 09:02:12,736 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:12,836 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-22 09:02:12,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:12,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-22 09:02:12,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:12,849 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-22 09:02:12,849 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:12,855 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:12,855 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:12,855 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 09:02:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:13,088 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:13,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2019-10-22 09:02:13,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115503443] [2019-10-22 09:02:13,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 09:02:13,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 09:02:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:02:13,090 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 24 states. [2019-10-22 09:02:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:13,489 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2019-10-22 09:02:13,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:02:13,489 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-22 09:02:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:13,490 INFO L225 Difference]: With dead ends: 35 [2019-10-22 09:02:13,490 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:02:13,491 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2019-10-22 09:02:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:02:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-22 09:02:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 09:02:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-10-22 09:02:13,494 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-10-22 09:02:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:13,494 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-10-22 09:02:13,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 09:02:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-10-22 09:02:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 09:02:13,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:13,496 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:13,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:13,696 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:13,697 INFO L82 PathProgramCache]: Analyzing trace with hash -99354543, now seen corresponding path program 6 times [2019-10-22 09:02:13,697 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:13,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320566900] [2019-10-22 09:02:13,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:13,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:13,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:13,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320566900] [2019-10-22 09:02:13,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113814534] [2019-10-22 09:02:13,949 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:14,045 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-22 09:02:14,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:14,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-22 09:02:14,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:14,166 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-10-22 09:02:14,167 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:14,172 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:14,172 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 09:02:14,173 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-10-22 09:02:14,322 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-22 09:02:14,322 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:14,324 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:14,324 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:14,324 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-22 09:02:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:14,327 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:14,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2019-10-22 09:02:14,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164751010] [2019-10-22 09:02:14,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 09:02:14,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:14,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 09:02:14,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:02:14,329 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 25 states. [2019-10-22 09:02:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:14,873 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-10-22 09:02:14,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:02:14,874 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2019-10-22 09:02:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:14,874 INFO L225 Difference]: With dead ends: 52 [2019-10-22 09:02:14,874 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 09:02:14,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 09:02:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 09:02:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-22 09:02:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 09:02:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-22 09:02:14,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2019-10-22 09:02:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:14,877 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-22 09:02:14,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 09:02:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-22 09:02:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 09:02:14,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:14,878 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:15,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:15,079 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1272435374, now seen corresponding path program 7 times [2019-10-22 09:02:15,080 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:15,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121122465] [2019-10-22 09:02:15,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:15,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:15,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:15,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121122465] [2019-10-22 09:02:15,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031446747] [2019-10-22 09:02:15,272 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:15,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-22 09:02:15,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:15,467 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:15,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2019-10-22 09:02:15,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208742526] [2019-10-22 09:02:15,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 09:02:15,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:15,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 09:02:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:02:15,469 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2019-10-22 09:02:15,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:15,890 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-10-22 09:02:15,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:02:15,890 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2019-10-22 09:02:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:15,891 INFO L225 Difference]: With dead ends: 41 [2019-10-22 09:02:15,891 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 09:02:15,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2019-10-22 09:02:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 09:02:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-22 09:02:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 09:02:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-10-22 09:02:15,901 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-10-22 09:02:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:15,901 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-10-22 09:02:15,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 09:02:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-10-22 09:02:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 09:02:15,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:15,902 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:16,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:16,103 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:16,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1255285209, now seen corresponding path program 8 times [2019-10-22 09:02:16,103 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:16,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665077300] [2019-10-22 09:02:16,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:16,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:16,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:16,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665077300] [2019-10-22 09:02:16,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273759635] [2019-10-22 09:02:16,372 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:16,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:02:16,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:16,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-22 09:02:16,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:16,608 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-10-22 09:02:16,608 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:16,613 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:16,613 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 09:02:16,614 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-10-22 09:02:16,731 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-22 09:02:16,731 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:16,732 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:16,732 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:16,733 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-22 09:02:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:16,735 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:16,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2019-10-22 09:02:16,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759028536] [2019-10-22 09:02:16,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-22 09:02:16,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-22 09:02:16,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2019-10-22 09:02:16,736 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 28 states. [2019-10-22 09:02:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:17,375 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-10-22 09:02:17,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:02:17,376 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2019-10-22 09:02:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:17,376 INFO L225 Difference]: With dead ends: 60 [2019-10-22 09:02:17,376 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 09:02:17,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2019-10-22 09:02:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 09:02:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-22 09:02:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 09:02:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-22 09:02:17,379 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2019-10-22 09:02:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:17,380 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-22 09:02:17,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-22 09:02:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-22 09:02:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-22 09:02:17,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:17,381 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:17,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:17,582 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrlenErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-10-22 09:02:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:17,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1362510140, now seen corresponding path program 9 times [2019-10-22 09:02:17,582 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:17,582 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452885923] [2019-10-22 09:02:17,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:17,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:17,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:17,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452885923] [2019-10-22 09:02:17,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143969258] [2019-10-22 09:02:17,844 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/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 [2019-10-22 09:02:17,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-22 09:02:17,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:17,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-22 09:02:17,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:17,966 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-22 09:02:17,966 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:17,969 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:17,970 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:17,970 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-10-22 09:02:17,988 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-10-22 09:02:17,989 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 09:02:17,995 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:17,996 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 09:02:17,996 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2019-10-22 09:02:18,094 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:18,094 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2019-10-22 09:02:18,094 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-22 09:02:18,105 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 09:02:18,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:02:18,108 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 09:02:18,108 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2019-10-22 09:02:18,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:02:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-22 09:02:18,169 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:18,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 23 [2019-10-22 09:02:18,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540678698] [2019-10-22 09:02:18,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 09:02:18,170 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:18,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 09:02:18,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:02:18,171 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 24 states. [2019-10-22 09:02:18,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:18,848 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-10-22 09:02:18,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:02:18,849 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2019-10-22 09:02:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:18,849 INFO L225 Difference]: With dead ends: 44 [2019-10-22 09:02:18,849 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:02:18,850 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 09:02:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:02:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:02:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:02:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:02:18,850 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2019-10-22 09:02:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:18,850 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:02:18,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 09:02:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:02:18,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:02:19,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:19,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:02:19 BoogieIcfgContainer [2019-10-22 09:02:19,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:02:19,055 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:02:19,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:02:19,056 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:02:19,056 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:04" (3/4) ... [2019-10-22 09:02:19,059 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:02:19,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-10-22 09:02:19,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-10-22 09:02:19,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-10-22 09:02:19,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-10-22 09:02:19,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-10-22 09:02:19,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2019-10-22 09:02:19,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-10-22 09:02:19,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-10-22 09:02:19,069 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2019-10-22 09:02:19,070 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 09:02:19,070 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-10-22 09:02:19,109 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6134064e-cb5d-40af-a133-4b04382dc970/bin/uautomizer/witness.graphml [2019-10-22 09:02:19,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:02:19,111 INFO L168 Benchmark]: Toolchain (without parser) took 15647.07 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 353.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -192.4 MB). Peak memory consumption was 161.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:19,111 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:19,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 683.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -174.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:19,112 INFO L168 Benchmark]: Boogie Preprocessor took 56.89 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:19,112 INFO L168 Benchmark]: RCFGBuilder took 509.10 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: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:19,113 INFO L168 Benchmark]: TraceAbstraction took 14338.77 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 222.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -71.9 MB). Peak memory consumption was 150.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:19,113 INFO L168 Benchmark]: Witness Printer took 54.43 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:19,115 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 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 683.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -174.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 56.89 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 509.10 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: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14338.77 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 222.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -71.9 MB). Peak memory consumption was 150.9 MB. Max. memory is 11.5 GB. * Witness Printer took 54.43 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 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: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 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 - 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: 14.2s, OverallIterations: 19, TraceHistogramMax: 5, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 282 SDtfs, 659 SDslu, 1119 SDs, 0 SdLazy, 3766 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 579 GetRequests, 247 SyntacticMatches, 8 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 19 MinimizatonAttempts, 54 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 693 NumberOfCodeBlocks, 690 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 664 ConstructedInterpolants, 24 QuantifiedInterpolants, 148015 SizeOfPredicates, 77 NumberOfNonLiveVariables, 1248 ConjunctsInSsa, 289 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 178/514 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...