./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/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 b812e7d14425eea3a24125f5e2db40eadfc6c14c ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:19:47,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:19:47,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:19:47,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:19:47,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:19:47,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:19:47,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:19:47,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:19:47,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:19:47,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:19:47,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:19:47,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:19:47,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:19:47,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:19:47,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:19:47,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:19:47,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:19:47,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:19:47,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:19:47,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:19:47,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:19:47,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:19:47,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:19:47,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:19:47,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:19:47,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:19:47,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:19:47,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:19:47,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:19:47,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:19:47,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:19:47,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:19:47,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:19:47,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:19:47,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:19:47,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:19:47,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:19:47,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:19:47,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:19:47,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:19:47,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:19:47,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-16 00:19:47,996 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:19:47,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:19:47,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:19:47,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:19:47,999 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:19:47,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:19:47,999 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:19:47,999 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-16 00:19:48,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:19:48,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:19:48,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:19:48,001 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-16 00:19:48,002 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-16 00:19:48,002 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-16 00:19:48,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:19:48,002 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:19:48,002 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:19:48,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:19:48,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:19:48,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:19:48,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:19:48,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:19:48,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:19:48,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:19:48,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:19:48,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:19:48,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/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 -> b812e7d14425eea3a24125f5e2db40eadfc6c14c [2019-11-16 00:19:48,052 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:19:48,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:19:48,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:19:48,066 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:19:48,067 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:19:48,067 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2019-11-16 00:19:48,130 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/data/cf7d2a4cf/ac1b387cacdf433489d067cf8c4a6fd1/FLAG0b25f2c90 [2019-11-16 00:19:48,571 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:19:48,572 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2019-11-16 00:19:48,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/data/cf7d2a4cf/ac1b387cacdf433489d067cf8c4a6fd1/FLAG0b25f2c90 [2019-11-16 00:19:48,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/data/cf7d2a4cf/ac1b387cacdf433489d067cf8c4a6fd1 [2019-11-16 00:19:48,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:19:48,607 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-16 00:19:48,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:19:48,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:19:48,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:19:48,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:19:48" (1/1) ... [2019-11-16 00:19:48,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7dd61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:48, skipping insertion in model container [2019-11-16 00:19:48,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:19:48" (1/1) ... [2019-11-16 00:19:48,621 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:19:48,659 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:19:49,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:19:49,009 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:19:49,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:19:49,110 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:19:49,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49 WrapperNode [2019-11-16 00:19:49,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:19:49,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:19:49,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:19:49,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:19:49,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (1/1) ... [2019-11-16 00:19:49,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (1/1) ... [2019-11-16 00:19:49,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (1/1) ... [2019-11-16 00:19:49,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (1/1) ... [2019-11-16 00:19:49,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (1/1) ... [2019-11-16 00:19:49,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (1/1) ... [2019-11-16 00:19:49,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (1/1) ... [2019-11-16 00:19:49,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:19:49,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:19:49,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:19:49,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:19:49,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:19:49,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-16 00:19:49,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:19:49,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-16 00:19:49,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-16 00:19:49,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-16 00:19:49,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-16 00:19:49,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-16 00:19:49,244 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2019-11-16 00:19:49,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-16 00:19:49,245 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-16 00:19:49,245 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-16 00:19:49,245 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-16 00:19:49,246 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-16 00:19:49,246 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-16 00:19:49,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-16 00:19:49,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-16 00:19:49,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-16 00:19:49,247 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-16 00:19:49,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-16 00:19:49,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-16 00:19:49,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-16 00:19:49,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-16 00:19:49,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-16 00:19:49,250 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-16 00:19:49,250 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-16 00:19:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-16 00:19:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-16 00:19:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-16 00:19:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-16 00:19:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-16 00:19:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-16 00:19:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-16 00:19:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-16 00:19:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-16 00:19:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-16 00:19:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-16 00:19:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-16 00:19:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-16 00:19:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-16 00:19:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-16 00:19:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-16 00:19:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-16 00:19:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-16 00:19:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-16 00:19:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-16 00:19:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-16 00:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-16 00:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-16 00:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-16 00:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-16 00:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-16 00:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-16 00:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-16 00:19:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-16 00:19:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-16 00:19:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-16 00:19:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-16 00:19:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-16 00:19:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-16 00:19:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-16 00:19:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-16 00:19:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-16 00:19:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-16 00:19:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-16 00:19:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-16 00:19:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-16 00:19:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-16 00:19:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-16 00:19:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-16 00:19:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-16 00:19:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-16 00:19:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-16 00:19:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-16 00:19:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-16 00:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-16 00:19:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-16 00:19:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-16 00:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-16 00:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-16 00:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-16 00:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-16 00:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-16 00:19:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-16 00:19:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-16 00:19:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-16 00:19:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-16 00:19:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-16 00:19:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-16 00:19:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-16 00:19:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-16 00:19:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-16 00:19:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-16 00:19:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-16 00:19:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-16 00:19:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-16 00:19:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-16 00:19:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-16 00:19:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-16 00:19:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-16 00:19:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-16 00:19:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-16 00:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-16 00:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-16 00:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-16 00:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-16 00:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-16 00:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-16 00:19:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-16 00:19:49,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-16 00:19:49,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-16 00:19:49,269 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2019-11-16 00:19:49,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-16 00:19:49,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-16 00:19:49,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-16 00:19:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-16 00:19:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-16 00:19:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-16 00:19:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:19:49,795 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:19:49,795 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-16 00:19:49,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:19:49 BoogieIcfgContainer [2019-11-16 00:19:49,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:19:49,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:19:49,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:19:49,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:19:49,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:19:48" (1/3) ... [2019-11-16 00:19:49,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d1f4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:19:49, skipping insertion in model container [2019-11-16 00:19:49,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:19:49" (2/3) ... [2019-11-16 00:19:49,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d1f4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:19:49, skipping insertion in model container [2019-11-16 00:19:49,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:19:49" (3/3) ... [2019-11-16 00:19:49,805 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2019-11-16 00:19:49,815 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:19:49,829 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-16 00:19:49,840 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-16 00:19:49,869 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:19:49,869 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-16 00:19:49,870 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:19:49,871 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:19:49,877 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:19:49,877 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:19:49,877 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:19:49,877 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:19:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-16 00:19:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-16 00:19:49,906 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:49,907 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:49,910 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006156, now seen corresponding path program 1 times [2019-11-16 00:19:49,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:49,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353423659] [2019-11-16 00:19:49,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:49,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:49,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:50,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353423659] [2019-11-16 00:19:50,126 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:50,126 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-16 00:19:50,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857284232] [2019-11-16 00:19:50,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:19:50,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:19:50,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:19:50,146 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-11-16 00:19:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:50,270 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-16 00:19:50,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:19:50,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-16 00:19:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:50,279 INFO L225 Difference]: With dead ends: 31 [2019-11-16 00:19:50,280 INFO L226 Difference]: Without dead ends: 28 [2019-11-16 00:19:50,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:19:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-16 00:19:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-16 00:19:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-16 00:19:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-16 00:19:50,328 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2019-11-16 00:19:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:50,329 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-16 00:19:50,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:19:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-16 00:19:50,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-16 00:19:50,331 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:50,331 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:50,332 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:50,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006155, now seen corresponding path program 1 times [2019-11-16 00:19:50,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:50,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652666547] [2019-11-16 00:19:50,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:50,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:50,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:50,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652666547] [2019-11-16 00:19:50,445 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:50,445 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-16 00:19:50,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952286687] [2019-11-16 00:19:50,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:19:50,449 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:19:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:19:50,449 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2019-11-16 00:19:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:50,556 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-16 00:19:50,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:19:50,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-16 00:19:50,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:50,557 INFO L225 Difference]: With dead ends: 27 [2019-11-16 00:19:50,557 INFO L226 Difference]: Without dead ends: 27 [2019-11-16 00:19:50,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:19:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-16 00:19:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-16 00:19:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-16 00:19:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-16 00:19:50,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2019-11-16 00:19:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:50,564 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-16 00:19:50,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:19:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-16 00:19:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-16 00:19:50,564 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:50,565 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:50,565 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006102, now seen corresponding path program 1 times [2019-11-16 00:19:50,566 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:50,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197570410] [2019-11-16 00:19:50,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:50,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:50,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:50,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197570410] [2019-11-16 00:19:50,648 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:50,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:19:50,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677019518] [2019-11-16 00:19:50,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:19:50,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:50,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:19:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:19:50,649 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2019-11-16 00:19:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:50,767 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-16 00:19:50,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:19:50,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-16 00:19:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:50,770 INFO L225 Difference]: With dead ends: 34 [2019-11-16 00:19:50,771 INFO L226 Difference]: Without dead ends: 34 [2019-11-16 00:19:50,771 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:19:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-16 00:19:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-11-16 00:19:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-16 00:19:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-16 00:19:50,783 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2019-11-16 00:19:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:50,783 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-16 00:19:50,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:19:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-16 00:19:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-16 00:19:50,784 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:50,785 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:50,787 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2094946520, now seen corresponding path program 1 times [2019-11-16 00:19:50,789 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:50,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882030519] [2019-11-16 00:19:50,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:50,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:50,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:50,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882030519] [2019-11-16 00:19:50,870 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:50,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-16 00:19:50,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050360682] [2019-11-16 00:19:50,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:19:50,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:19:50,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:19:50,871 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2019-11-16 00:19:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:50,977 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-16 00:19:50,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:19:50,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-16 00:19:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:50,978 INFO L225 Difference]: With dead ends: 38 [2019-11-16 00:19:50,979 INFO L226 Difference]: Without dead ends: 38 [2019-11-16 00:19:50,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:19:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-16 00:19:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-11-16 00:19:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-16 00:19:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-16 00:19:50,983 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2019-11-16 00:19:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:50,984 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-16 00:19:50,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:19:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-16 00:19:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-16 00:19:50,984 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:50,985 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:50,985 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2136386996, now seen corresponding path program 1 times [2019-11-16 00:19:50,985 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:50,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293344593] [2019-11-16 00:19:50,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:50,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:50,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:51,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293344593] [2019-11-16 00:19:51,059 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:51,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:19:51,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436282742] [2019-11-16 00:19:51,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:19:51,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:19:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:19:51,060 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 6 states. [2019-11-16 00:19:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:51,199 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-11-16 00:19:51,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:19:51,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-16 00:19:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:51,200 INFO L225 Difference]: With dead ends: 30 [2019-11-16 00:19:51,201 INFO L226 Difference]: Without dead ends: 30 [2019-11-16 00:19:51,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:19:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-16 00:19:51,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-16 00:19:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-16 00:19:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-16 00:19:51,205 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2019-11-16 00:19:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:51,205 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-16 00:19:51,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:19:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-16 00:19:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-16 00:19:51,206 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:51,206 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:51,206 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2136386997, now seen corresponding path program 1 times [2019-11-16 00:19:51,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:51,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66003707] [2019-11-16 00:19:51,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:51,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:51,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:51,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66003707] [2019-11-16 00:19:51,332 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:51,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-16 00:19:51,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457376969] [2019-11-16 00:19:51,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:19:51,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:19:51,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:19:51,334 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2019-11-16 00:19:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:51,517 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-16 00:19:51,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:19:51,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-16 00:19:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:51,522 INFO L225 Difference]: With dead ends: 36 [2019-11-16 00:19:51,522 INFO L226 Difference]: Without dead ends: 36 [2019-11-16 00:19:51,523 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 [2019-11-16 00:19:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-16 00:19:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-16 00:19:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-16 00:19:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-16 00:19:51,525 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 13 [2019-11-16 00:19:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:51,526 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-16 00:19:51,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:19:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-16 00:19:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-16 00:19:51,527 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:51,527 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:51,527 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:51,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1041914347, now seen corresponding path program 1 times [2019-11-16 00:19:51,528 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:51,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912157006] [2019-11-16 00:19:51,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:51,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:51,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:51,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912157006] [2019-11-16 00:19:51,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255044997] [2019-11-16 00:19:51,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:51,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-16 00:19:51,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:19:51,881 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-16 00:19:51,882 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:19:51,889 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:51,890 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:19:51,890 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-16 00:19:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:51,912 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:19:51,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-11-16 00:19:51,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560404431] [2019-11-16 00:19:51,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-16 00:19:51,913 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:51,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-16 00:19:51,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:19:51,914 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2019-11-16 00:19:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:52,065 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2019-11-16 00:19:52,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:19:52,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-16 00:19:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:52,066 INFO L225 Difference]: With dead ends: 37 [2019-11-16 00:19:52,066 INFO L226 Difference]: Without dead ends: 37 [2019-11-16 00:19:52,066 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 [2019-11-16 00:19:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-16 00:19:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-16 00:19:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-16 00:19:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-16 00:19:52,070 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2019-11-16 00:19:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:52,070 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-16 00:19:52,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-16 00:19:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-16 00:19:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-16 00:19:52,071 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:52,071 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:52,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:52,276 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2015340679, now seen corresponding path program 1 times [2019-11-16 00:19:52,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:52,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058511063] [2019-11-16 00:19:52,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:52,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:52,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:52,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058511063] [2019-11-16 00:19:52,434 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:52,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-16 00:19:52,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132767284] [2019-11-16 00:19:52,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-16 00:19:52,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-16 00:19:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:19:52,436 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2019-11-16 00:19:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:52,659 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-16 00:19:52,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-16 00:19:52,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-16 00:19:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:52,661 INFO L225 Difference]: With dead ends: 39 [2019-11-16 00:19:52,661 INFO L226 Difference]: Without dead ends: 39 [2019-11-16 00:19:52,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:19:52,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-16 00:19:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-11-16 00:19:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-16 00:19:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-16 00:19:52,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 16 [2019-11-16 00:19:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:52,667 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-16 00:19:52,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-16 00:19:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-16 00:19:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-16 00:19:52,668 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:52,668 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:52,668 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:52,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1886599607, now seen corresponding path program 1 times [2019-11-16 00:19:52,669 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:52,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388918227] [2019-11-16 00:19:52,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:52,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:52,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:52,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388918227] [2019-11-16 00:19:52,858 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:52,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-16 00:19:52,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225392488] [2019-11-16 00:19:52,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-16 00:19:52,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-16 00:19:52,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:19:52,859 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2019-11-16 00:19:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:53,159 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-11-16 00:19:53,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-16 00:19:53,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-16 00:19:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:53,160 INFO L225 Difference]: With dead ends: 51 [2019-11-16 00:19:53,160 INFO L226 Difference]: Without dead ends: 51 [2019-11-16 00:19:53,160 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 [2019-11-16 00:19:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-16 00:19:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2019-11-16 00:19:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-16 00:19:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-11-16 00:19:53,164 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 16 [2019-11-16 00:19:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:53,165 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-11-16 00:19:53,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-16 00:19:53,165 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-11-16 00:19:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-16 00:19:53,165 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:53,166 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:53,166 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash 280521542, now seen corresponding path program 1 times [2019-11-16 00:19:53,166 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:53,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655233994] [2019-11-16 00:19:53,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:53,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:53,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:53,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655233994] [2019-11-16 00:19:53,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:19:53,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-16 00:19:53,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803009258] [2019-11-16 00:19:53,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:19:53,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:53,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:19:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:19:53,244 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2019-11-16 00:19:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:53,306 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-11-16 00:19:53,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:19:53,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-16 00:19:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:53,307 INFO L225 Difference]: With dead ends: 36 [2019-11-16 00:19:53,307 INFO L226 Difference]: Without dead ends: 21 [2019-11-16 00:19:53,308 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:19:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-16 00:19:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-16 00:19:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-16 00:19:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-16 00:19:53,310 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-11-16 00:19:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:53,310 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-16 00:19:53,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:19:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-16 00:19:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-16 00:19:53,311 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:53,311 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:53,311 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:53,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1912442426, now seen corresponding path program 1 times [2019-11-16 00:19:53,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:53,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407600004] [2019-11-16 00:19:53,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:53,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:53,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:53,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407600004] [2019-11-16 00:19:53,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892058482] [2019-11-16 00:19:53,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:53,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-16 00:19:53,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:19:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:53,681 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:19:53,681 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-16 00:19:53,681 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458702352] [2019-11-16 00:19:53,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-16 00:19:53,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:53,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-16 00:19:53,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-16 00:19:53,682 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 16 states. [2019-11-16 00:19:53,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:53,916 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-11-16 00:19:53,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-16 00:19:53,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-11-16 00:19:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:53,922 INFO L225 Difference]: With dead ends: 26 [2019-11-16 00:19:53,922 INFO L226 Difference]: Without dead ends: 26 [2019-11-16 00:19:53,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:19:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-16 00:19:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-16 00:19:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-16 00:19:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-16 00:19:53,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2019-11-16 00:19:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:53,925 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-16 00:19:53,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-16 00:19:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-16 00:19:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-16 00:19:53,926 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:53,926 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:54,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:54,127 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash 831122644, now seen corresponding path program 2 times [2019-11-16 00:19:54,127 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:54,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454233011] [2019-11-16 00:19:54,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:54,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:54,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:54,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454233011] [2019-11-16 00:19:54,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501420613] [2019-11-16 00:19:54,456 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:54,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:19:54,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:19:54,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-16 00:19:54,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:19:54,615 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:19:54,615 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:19:54,622 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:54,623 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:19:54,623 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-11-16 00:19:54,788 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:54,788 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-11-16 00:19:54,788 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:19:54,797 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:54,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:19:54,800 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:19:54,800 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2019-11-16 00:19:54,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:19:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:54,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:19:54,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2019-11-16 00:19:54,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188148239] [2019-11-16 00:19:54,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-16 00:19:54,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-16 00:19:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2019-11-16 00:19:54,931 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 21 states. [2019-11-16 00:19:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:55,884 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-11-16 00:19:55,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-16 00:19:55,885 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2019-11-16 00:19:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:55,885 INFO L225 Difference]: With dead ends: 44 [2019-11-16 00:19:55,885 INFO L226 Difference]: Without dead ends: 36 [2019-11-16 00:19:55,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2019-11-16 00:19:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-16 00:19:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-16 00:19:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-16 00:19:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-11-16 00:19:55,889 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2019-11-16 00:19:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:55,890 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-11-16 00:19:55,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-16 00:19:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-11-16 00:19:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-16 00:19:55,891 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:55,891 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:56,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:56,097 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:56,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:56,098 INFO L82 PathProgramCache]: Analyzing trace with hash 976723133, now seen corresponding path program 3 times [2019-11-16 00:19:56,098 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:56,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278464487] [2019-11-16 00:19:56,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:56,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:56,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:56,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278464487] [2019-11-16 00:19:56,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934160373] [2019-11-16 00:19:56,357 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:56,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-16 00:19:56,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:19:56,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-16 00:19:56,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:19:56,620 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:19:56,620 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:19:56,626 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:56,626 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:19:56,627 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-16 00:19:56,725 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:19:56,725 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:19:56,726 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:56,727 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:19:56,727 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-16 00:19:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:56,729 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:19:56,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2019-11-16 00:19:56,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561946697] [2019-11-16 00:19:56,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-16 00:19:56,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:56,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-16 00:19:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:19:56,730 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 22 states. [2019-11-16 00:19:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:57,126 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-11-16 00:19:57,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:19:57,126 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-11-16 00:19:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:57,127 INFO L225 Difference]: With dead ends: 49 [2019-11-16 00:19:57,127 INFO L226 Difference]: Without dead ends: 38 [2019-11-16 00:19:57,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2019-11-16 00:19:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-16 00:19:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-16 00:19:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-16 00:19:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-16 00:19:57,130 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2019-11-16 00:19:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:57,131 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-16 00:19:57,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-16 00:19:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-16 00:19:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-16 00:19:57,132 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:57,132 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:57,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:57,335 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:57,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1134145536, now seen corresponding path program 4 times [2019-11-16 00:19:57,336 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:57,336 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926887784] [2019-11-16 00:19:57,336 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:57,336 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:57,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:57,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926887784] [2019-11-16 00:19:57,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506678120] [2019-11-16 00:19:57,535 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:57,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:19:57,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:19:57,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-16 00:19:57,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:19:57,669 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-16 00:19:57,669 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:19:57,680 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:57,680 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:19:57,681 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-16 00:19:57,718 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-16 00:19:57,718 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:19:57,727 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:57,727 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:19:57,727 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-16 00:19:57,947 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:57,947 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 19 treesize of output 19 [2019-11-16 00:19:57,948 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:19:57,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:57,956 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:19:57,956 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2019-11-16 00:19:57,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:19:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:58,039 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:19:58,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2019-11-16 00:19:58,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90572665] [2019-11-16 00:19:58,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-16 00:19:58,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-16 00:19:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2019-11-16 00:19:58,040 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2019-11-16 00:19:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:58,616 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-11-16 00:19:58,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:19:58,616 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2019-11-16 00:19:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:58,617 INFO L225 Difference]: With dead ends: 40 [2019-11-16 00:19:58,617 INFO L226 Difference]: Without dead ends: 40 [2019-11-16 00:19:58,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2019-11-16 00:19:58,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-16 00:19:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2019-11-16 00:19:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-16 00:19:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-16 00:19:58,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2019-11-16 00:19:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:19:58,621 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-16 00:19:58,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-16 00:19:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-16 00:19:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-16 00:19:58,622 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:19:58,622 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:19:58,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:58,825 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:19:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:19:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1178045774, now seen corresponding path program 5 times [2019-11-16 00:19:58,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:19:58,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239806615] [2019-11-16 00:19:58,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:58,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:19:58,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:19:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:19:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:59,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239806615] [2019-11-16 00:19:59,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109545918] [2019-11-16 00:19:59,095 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:19:59,214 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-16 00:19:59,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:19:59,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-16 00:19:59,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:19:59,351 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:19:59,352 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:19:59,358 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:59,358 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:19:59,359 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-16 00:19:59,469 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:19:59,469 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:19:59,470 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:19:59,471 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:19:59,471 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-16 00:19:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:19:59,473 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:19:59,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2019-11-16 00:19:59,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338842885] [2019-11-16 00:19:59,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-16 00:19:59,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:19:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-16 00:19:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2019-11-16 00:19:59,475 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2019-11-16 00:19:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:19:59,996 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2019-11-16 00:19:59,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-16 00:19:59,996 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2019-11-16 00:19:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:19:59,997 INFO L225 Difference]: With dead ends: 59 [2019-11-16 00:19:59,997 INFO L226 Difference]: Without dead ends: 45 [2019-11-16 00:19:59,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2019-11-16 00:19:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-16 00:20:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-11-16 00:20:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-16 00:20:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-16 00:20:00,003 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2019-11-16 00:20:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:00,004 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-16 00:20:00,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-16 00:20:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-16 00:20:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-16 00:20:00,005 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:00,005 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:00,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:00,209 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:00,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:00,209 INFO L82 PathProgramCache]: Analyzing trace with hash 915945643, now seen corresponding path program 6 times [2019-11-16 00:20:00,209 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:00,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062257573] [2019-11-16 00:20:00,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:00,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:00,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:00,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062257573] [2019-11-16 00:20:00,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632789024] [2019-11-16 00:20:00,428 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:00,560 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-16 00:20:00,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:00,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-16 00:20:00,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:00,804 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:00,804 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2019-11-16 00:20:00,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854380786] [2019-11-16 00:20:00,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-16 00:20:00,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:00,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-16 00:20:00,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2019-11-16 00:20:00,806 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2019-11-16 00:20:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:01,249 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2019-11-16 00:20:01,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:20:01,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2019-11-16 00:20:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:01,250 INFO L225 Difference]: With dead ends: 47 [2019-11-16 00:20:01,250 INFO L226 Difference]: Without dead ends: 47 [2019-11-16 00:20:01,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2019-11-16 00:20:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-16 00:20:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-16 00:20:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-16 00:20:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-11-16 00:20:01,254 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2019-11-16 00:20:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:01,255 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-11-16 00:20:01,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-16 00:20:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-11-16 00:20:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-16 00:20:01,256 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:01,256 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:01,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:01,460 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:01,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1009410243, now seen corresponding path program 7 times [2019-11-16 00:20:01,460 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:01,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443681469] [2019-11-16 00:20:01,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:01,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:01,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:01,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443681469] [2019-11-16 00:20:01,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868953750] [2019-11-16 00:20:01,735 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:01,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-16 00:20:01,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:02,155 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:20:02,156 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:02,162 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:02,162 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:20:02,162 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2019-11-16 00:20:02,461 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:20:02,462 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:02,463 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:02,464 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:02,464 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-16 00:20:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:02,470 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:02,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2019-11-16 00:20:02,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258268376] [2019-11-16 00:20:02,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-16 00:20:02,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-16 00:20:02,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2019-11-16 00:20:02,472 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 32 states. [2019-11-16 00:20:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:03,220 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-16 00:20:03,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-16 00:20:03,221 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2019-11-16 00:20:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:03,221 INFO L225 Difference]: With dead ends: 69 [2019-11-16 00:20:03,221 INFO L226 Difference]: Without dead ends: 52 [2019-11-16 00:20:03,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2019-11-16 00:20:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-16 00:20:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-16 00:20:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-16 00:20:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-11-16 00:20:03,227 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2019-11-16 00:20:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:03,227 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-11-16 00:20:03,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-16 00:20:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-11-16 00:20:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-16 00:20:03,228 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:03,228 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:03,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:03,429 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1167106758, now seen corresponding path program 8 times [2019-11-16 00:20:03,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:03,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099387334] [2019-11-16 00:20:03,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:03,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:03,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:03,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099387334] [2019-11-16 00:20:03,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183786770] [2019-11-16 00:20:03,692 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:03,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:20:03,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:03,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-16 00:20:03,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:03,999 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:04,000 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 26 [2019-11-16 00:20:04,000 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002429756] [2019-11-16 00:20:04,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-16 00:20:04,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:04,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-16 00:20:04,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:20:04,001 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 27 states. [2019-11-16 00:20:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:04,539 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-16 00:20:04,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-16 00:20:04,540 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2019-11-16 00:20:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:04,540 INFO L225 Difference]: With dead ends: 54 [2019-11-16 00:20:04,540 INFO L226 Difference]: Without dead ends: 54 [2019-11-16 00:20:04,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2019-11-16 00:20:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-16 00:20:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-11-16 00:20:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-16 00:20:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-16 00:20:04,544 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2019-11-16 00:20:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:04,544 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-16 00:20:04,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-16 00:20:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-16 00:20:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-16 00:20:04,545 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:04,545 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:04,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:04,746 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1517157576, now seen corresponding path program 9 times [2019-11-16 00:20:04,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:04,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321200219] [2019-11-16 00:20:04,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:04,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:04,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:05,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321200219] [2019-11-16 00:20:05,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050214135] [2019-11-16 00:20:05,135 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:05,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-16 00:20:05,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:05,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-16 00:20:05,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:05,444 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:20:05,444 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:05,449 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:05,449 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:20:05,449 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-16 00:20:05,590 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:20:05,591 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:05,594 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:05,595 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:05,595 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-16 00:20:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:05,600 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:05,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 31 [2019-11-16 00:20:05,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175449230] [2019-11-16 00:20:05,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-16 00:20:05,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:05,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-16 00:20:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2019-11-16 00:20:05,602 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 31 states. [2019-11-16 00:20:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:06,510 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2019-11-16 00:20:06,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-16 00:20:06,510 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2019-11-16 00:20:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:06,511 INFO L225 Difference]: With dead ends: 79 [2019-11-16 00:20:06,511 INFO L226 Difference]: Without dead ends: 59 [2019-11-16 00:20:06,511 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2019-11-16 00:20:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-16 00:20:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-11-16 00:20:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-16 00:20:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-16 00:20:06,519 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2019-11-16 00:20:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:06,519 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-16 00:20:06,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-16 00:20:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-16 00:20:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-16 00:20:06,521 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:06,521 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:06,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:06,725 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1467810149, now seen corresponding path program 10 times [2019-11-16 00:20:06,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:06,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525319649] [2019-11-16 00:20:06,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:06,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:06,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 47 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:07,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525319649] [2019-11-16 00:20:07,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590797420] [2019-11-16 00:20:07,039 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:07,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:20:07,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:07,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-16 00:20:07,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:07,190 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-16 00:20:07,191 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:07,196 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:07,197 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:07,197 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-16 00:20:07,253 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-16 00:20:07,253 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:07,258 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:07,258 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:07,258 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-16 00:20:07,512 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:07,513 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 19 treesize of output 19 [2019-11-16 00:20:07,513 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:20:07,521 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:07,521 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:07,521 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2019-11-16 00:20:07,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:20:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 50 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:07,636 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:07,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 32 [2019-11-16 00:20:07,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599105739] [2019-11-16 00:20:07,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-16 00:20:07,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-16 00:20:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2019-11-16 00:20:07,638 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 33 states. [2019-11-16 00:20:08,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:08,638 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2019-11-16 00:20:08,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-16 00:20:08,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 55 [2019-11-16 00:20:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:08,639 INFO L225 Difference]: With dead ends: 61 [2019-11-16 00:20:08,639 INFO L226 Difference]: Without dead ends: 61 [2019-11-16 00:20:08,639 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2019-11-16 00:20:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-16 00:20:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-11-16 00:20:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-16 00:20:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-16 00:20:08,642 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2019-11-16 00:20:08,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:08,642 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-16 00:20:08,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-16 00:20:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-16 00:20:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-16 00:20:08,643 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:08,643 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:08,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:08,850 INFO L410 AbstractCegarLoop]: === Iteration 21 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:08,850 INFO L82 PathProgramCache]: Analyzing trace with hash 470099401, now seen corresponding path program 11 times [2019-11-16 00:20:08,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:08,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849812791] [2019-11-16 00:20:08,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:08,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:08,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:09,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849812791] [2019-11-16 00:20:09,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127521734] [2019-11-16 00:20:09,190 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:09,312 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-16 00:20:09,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:09,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 55 conjunts are in the unsatisfiable core [2019-11-16 00:20:09,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:09,554 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:20:09,554 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:09,558 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:09,559 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:20:09,559 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-16 00:20:09,691 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:20:09,692 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:09,693 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:09,693 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:09,693 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-16 00:20:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:09,698 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:09,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 34 [2019-11-16 00:20:09,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272056532] [2019-11-16 00:20:09,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-16 00:20:09,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:09,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-16 00:20:09,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2019-11-16 00:20:09,700 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 34 states. [2019-11-16 00:20:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:10,591 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2019-11-16 00:20:10,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-16 00:20:10,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 58 [2019-11-16 00:20:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:10,592 INFO L225 Difference]: With dead ends: 89 [2019-11-16 00:20:10,592 INFO L226 Difference]: Without dead ends: 66 [2019-11-16 00:20:10,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=1903, Unknown=0, NotChecked=0, Total=2070 [2019-11-16 00:20:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-16 00:20:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2019-11-16 00:20:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-16 00:20:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-11-16 00:20:10,597 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2019-11-16 00:20:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:10,597 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-11-16 00:20:10,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-16 00:20:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-11-16 00:20:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-16 00:20:10,598 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:10,598 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:10,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:10,804 INFO L410 AbstractCegarLoop]: === Iteration 22 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:10,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:10,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1507993228, now seen corresponding path program 12 times [2019-11-16 00:20:10,805 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:10,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952709701] [2019-11-16 00:20:10,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:10,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:10,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 68 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:11,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952709701] [2019-11-16 00:20:11,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001956633] [2019-11-16 00:20:11,172 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:11,321 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-16 00:20:11,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:11,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-16 00:20:11,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 66 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:11,698 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:11,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2019-11-16 00:20:11,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619463332] [2019-11-16 00:20:11,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-16 00:20:11,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:11,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-16 00:20:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2019-11-16 00:20:11,700 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 41 states. [2019-11-16 00:20:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:12,318 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2019-11-16 00:20:12,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-16 00:20:12,320 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 62 [2019-11-16 00:20:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:12,320 INFO L225 Difference]: With dead ends: 68 [2019-11-16 00:20:12,320 INFO L226 Difference]: Without dead ends: 68 [2019-11-16 00:20:12,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2019-11-16 00:20:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-16 00:20:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-16 00:20:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-16 00:20:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-11-16 00:20:12,323 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2019-11-16 00:20:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:12,324 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-11-16 00:20:12,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-16 00:20:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-11-16 00:20:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-16 00:20:12,324 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:12,324 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:12,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:12,525 INFO L410 AbstractCegarLoop]: === Iteration 23 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:12,525 INFO L82 PathProgramCache]: Analyzing trace with hash -731669694, now seen corresponding path program 13 times [2019-11-16 00:20:12,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:12,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425570745] [2019-11-16 00:20:12,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:12,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:12,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 15 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:13,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425570745] [2019-11-16 00:20:13,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090057946] [2019-11-16 00:20:13,139 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:13,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-16 00:20:13,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:13,523 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:20:13,523 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:13,534 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:13,535 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:20:13,535 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-11-16 00:20:14,083 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:14,083 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-11-16 00:20:14,083 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:20:14,093 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:14,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:20:14,094 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:14,094 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:31 [2019-11-16 00:20:14,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:20:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 66 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:14,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:14,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 46 [2019-11-16 00:20:14,256 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546394012] [2019-11-16 00:20:14,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-16 00:20:14,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-16 00:20:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1926, Unknown=0, NotChecked=0, Total=2070 [2019-11-16 00:20:14,258 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 46 states. [2019-11-16 00:20:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:20,466 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2019-11-16 00:20:20,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-16 00:20:20,474 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 65 [2019-11-16 00:20:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:20,474 INFO L225 Difference]: With dead ends: 104 [2019-11-16 00:20:20,475 INFO L226 Difference]: Without dead ends: 78 [2019-11-16 00:20:20,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=411, Invalid=5139, Unknown=0, NotChecked=0, Total=5550 [2019-11-16 00:20:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-16 00:20:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2019-11-16 00:20:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-16 00:20:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2019-11-16 00:20:20,479 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 65 [2019-11-16 00:20:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:20,479 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2019-11-16 00:20:20,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-16 00:20:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2019-11-16 00:20:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-16 00:20:20,480 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:20,480 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:20,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:20,687 INFO L410 AbstractCegarLoop]: === Iteration 24 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:20,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1423864881, now seen corresponding path program 14 times [2019-11-16 00:20:20,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:20,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718963743] [2019-11-16 00:20:20,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:20,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:20,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:21,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718963743] [2019-11-16 00:20:21,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130553042] [2019-11-16 00:20:21,130 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:21,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:20:21,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:21,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-16 00:20:21,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:21,568 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:20:21,568 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:21,580 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:21,581 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:20:21,581 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-11-16 00:20:22,374 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:22,375 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-11-16 00:20:22,375 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:20:22,383 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:22,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:20:22,384 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:22,384 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2019-11-16 00:20:22,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:20:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 91 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:22,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:22,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 49 [2019-11-16 00:20:22,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96384664] [2019-11-16 00:20:22,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-16 00:20:22,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-16 00:20:22,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2019-11-16 00:20:22,561 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 49 states. [2019-11-16 00:20:30,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:30,963 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2019-11-16 00:20:30,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-16 00:20:30,963 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 72 [2019-11-16 00:20:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:30,964 INFO L225 Difference]: With dead ends: 114 [2019-11-16 00:20:30,964 INFO L226 Difference]: Without dead ends: 85 [2019-11-16 00:20:30,966 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=443, Invalid=5719, Unknown=0, NotChecked=0, Total=6162 [2019-11-16 00:20:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-16 00:20:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2019-11-16 00:20:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-16 00:20:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-11-16 00:20:30,968 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 72 [2019-11-16 00:20:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:30,969 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-11-16 00:20:30,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-16 00:20:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-11-16 00:20:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-16 00:20:30,970 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:30,970 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:31,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:31,171 INFO L410 AbstractCegarLoop]: === Iteration 25 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash 128895164, now seen corresponding path program 15 times [2019-11-16 00:20:31,171 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:31,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022781564] [2019-11-16 00:20:31,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:31,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:31,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:31,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022781564] [2019-11-16 00:20:31,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541480937] [2019-11-16 00:20:31,681 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:31,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-16 00:20:31,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:31,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-16 00:20:31,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:32,206 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:20:32,206 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:32,211 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:32,212 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:20:32,212 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-16 00:20:32,399 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:20:32,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:32,400 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:32,401 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:32,401 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-16 00:20:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:32,409 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:32,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 43 [2019-11-16 00:20:32,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384994403] [2019-11-16 00:20:32,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-16 00:20:32,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-16 00:20:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2019-11-16 00:20:32,411 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 43 states. [2019-11-16 00:20:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:34,083 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2019-11-16 00:20:34,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-16 00:20:34,084 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 79 [2019-11-16 00:20:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:34,085 INFO L225 Difference]: With dead ends: 119 [2019-11-16 00:20:34,085 INFO L226 Difference]: Without dead ends: 87 [2019-11-16 00:20:34,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=209, Invalid=3097, Unknown=0, NotChecked=0, Total=3306 [2019-11-16 00:20:34,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-16 00:20:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2019-11-16 00:20:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-16 00:20:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2019-11-16 00:20:34,088 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2019-11-16 00:20:34,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:34,088 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2019-11-16 00:20:34,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-16 00:20:34,088 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2019-11-16 00:20:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-16 00:20:34,089 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:34,089 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:34,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:34,289 INFO L410 AbstractCegarLoop]: === Iteration 26 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2110713817, now seen corresponding path program 16 times [2019-11-16 00:20:34,290 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:34,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162446281] [2019-11-16 00:20:34,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:34,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:34,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 155 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:34,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162446281] [2019-11-16 00:20:34,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346526799] [2019-11-16 00:20:34,837 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:34,967 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:20:34,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:34,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 73 conjunts are in the unsatisfiable core [2019-11-16 00:20:34,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:34,974 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-16 00:20:34,974 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:34,979 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:34,979 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:34,979 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-16 00:20:35,042 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-16 00:20:35,043 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:35,056 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:35,056 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:35,057 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-16 00:20:35,820 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:35,821 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 19 treesize of output 19 [2019-11-16 00:20:35,821 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:20:35,834 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:35,834 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:35,834 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2019-11-16 00:20:35,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:20:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 162 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:36,006 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:36,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 44 [2019-11-16 00:20:36,007 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472591849] [2019-11-16 00:20:36,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-16 00:20:36,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-16 00:20:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1830, Unknown=0, NotChecked=0, Total=1980 [2019-11-16 00:20:36,008 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 45 states. [2019-11-16 00:20:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:37,958 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2019-11-16 00:20:37,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-16 00:20:37,958 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 83 [2019-11-16 00:20:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:37,959 INFO L225 Difference]: With dead ends: 89 [2019-11-16 00:20:37,959 INFO L226 Difference]: Without dead ends: 89 [2019-11-16 00:20:37,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=312, Invalid=3348, Unknown=0, NotChecked=0, Total=3660 [2019-11-16 00:20:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-16 00:20:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-16 00:20:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-16 00:20:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2019-11-16 00:20:37,963 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2019-11-16 00:20:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:37,963 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2019-11-16 00:20:37,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-16 00:20:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2019-11-16 00:20:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-16 00:20:37,964 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:37,964 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:38,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:38,166 INFO L410 AbstractCegarLoop]: === Iteration 27 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1954099925, now seen corresponding path program 17 times [2019-11-16 00:20:38,167 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:38,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385342564] [2019-11-16 00:20:38,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:38,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:38,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:38,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385342564] [2019-11-16 00:20:38,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794152564] [2019-11-16 00:20:38,877 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:39,051 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-16 00:20:39,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:39,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-16 00:20:39,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:39,453 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-16 00:20:39,454 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:39,458 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:39,459 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:20:39,459 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-16 00:20:39,649 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:20:39,650 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:39,652 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:39,652 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:39,652 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-16 00:20:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:39,662 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:39,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 46 [2019-11-16 00:20:39,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281105530] [2019-11-16 00:20:39,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-16 00:20:39,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:39,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-16 00:20:39,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1962, Unknown=0, NotChecked=0, Total=2070 [2019-11-16 00:20:39,664 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 46 states. [2019-11-16 00:20:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:41,555 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2019-11-16 00:20:41,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-16 00:20:41,556 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2019-11-16 00:20:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:41,557 INFO L225 Difference]: With dead ends: 129 [2019-11-16 00:20:41,557 INFO L226 Difference]: Without dead ends: 94 [2019-11-16 00:20:41,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=223, Invalid=3559, Unknown=0, NotChecked=0, Total=3782 [2019-11-16 00:20:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-16 00:20:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2019-11-16 00:20:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-16 00:20:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2019-11-16 00:20:41,560 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2019-11-16 00:20:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:41,561 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2019-11-16 00:20:41,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-16 00:20:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2019-11-16 00:20:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-16 00:20:41,562 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:20:41,562 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:20:41,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:41,763 INFO L410 AbstractCegarLoop]: === Iteration 28 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION]=== [2019-11-16 00:20:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:20:41,763 INFO L82 PathProgramCache]: Analyzing trace with hash -323927784, now seen corresponding path program 18 times [2019-11-16 00:20:41,763 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:20:41,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947708633] [2019-11-16 00:20:41,764 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:41,764 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:20:41,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:20:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:20:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 192 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:20:42,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947708633] [2019-11-16 00:20:42,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085893695] [2019-11-16 00:20:42,329 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:42,609 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-11-16 00:20:42,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:20:42,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-16 00:20:42,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:20:42,625 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-16 00:20:42,626 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:42,635 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:42,635 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:42,636 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-16 00:20:42,642 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-16 00:20:42,642 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:20:42,643 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:42,643 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:42,644 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-16 00:20:42,734 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:42,734 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 19 treesize of output 19 [2019-11-16 00:20:42,734 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:20:42,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:20:42,741 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:20:42,741 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2019-11-16 00:20:42,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:20:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-16 00:20:42,857 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:20:42,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8] total 35 [2019-11-16 00:20:42,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568089123] [2019-11-16 00:20:42,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-16 00:20:42,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:20:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-16 00:20:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2019-11-16 00:20:42,858 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 36 states. [2019-11-16 00:20:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:20:44,069 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2019-11-16 00:20:44,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-16 00:20:44,070 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 90 [2019-11-16 00:20:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:20:44,070 INFO L225 Difference]: With dead ends: 92 [2019-11-16 00:20:44,070 INFO L226 Difference]: Without dead ends: 0 [2019-11-16 00:20:44,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=365, Invalid=2391, Unknown=0, NotChecked=0, Total=2756 [2019-11-16 00:20:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-16 00:20:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-16 00:20:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-16 00:20:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-16 00:20:44,071 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2019-11-16 00:20:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:20:44,071 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-16 00:20:44,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-16 00:20:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-16 00:20:44,071 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-16 00:20:44,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:20:44,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:20:44 BoogieIcfgContainer [2019-11-16 00:20:44,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:20:44,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:20:44,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:20:44,277 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:20:44,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:19:49" (3/4) ... [2019-11-16 00:20:44,281 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-16 00:20:44,287 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-16 00:20:44,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-11-16 00:20:44,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-11-16 00:20:44,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-11-16 00:20:44,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-11-16 00:20:44,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2019-11-16 00:20:44,289 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-16 00:20:44,289 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-11-16 00:20:44,293 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2019-11-16 00:20:44,293 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-16 00:20:44,293 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-16 00:20:44,367 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_64bf2138-e1f7-4712-8e8d-6a1f63209cb1/bin/uautomizer/witness.graphml [2019-11-16 00:20:44,368 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:20:44,369 INFO L168 Benchmark]: Toolchain (without parser) took 55762.04 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 578.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -135.0 MB). Peak memory consumption was 443.3 MB. Max. memory is 11.5 GB. [2019-11-16 00:20:44,369 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:20:44,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 503.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.7 MB). Free memory was 939.3 MB in the beginning and 1.2 GB in the end (delta: -216.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-16 00:20:44,370 INFO L168 Benchmark]: Boogie Preprocessor took 58.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:20:44,370 INFO L168 Benchmark]: RCFGBuilder took 625.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 11.5 GB. [2019-11-16 00:20:44,371 INFO L168 Benchmark]: TraceAbstraction took 54478.70 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 400.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.2 MB). Peak memory consumption was 426.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:20:44,371 INFO L168 Benchmark]: Witness Printer took 90.99 ms. Allocated memory is still 1.6 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 11.5 GB. [2019-11-16 00:20:44,373 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 503.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.7 MB). Free memory was 939.3 MB in the beginning and 1.2 GB in the end (delta: -216.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 58.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 625.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 54478.70 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 400.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.2 MB). Peak memory consumption was 426.7 MB. Max. memory is 11.5 GB. * Witness Printer took 90.99 ms. Allocated memory is still 1.6 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: 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: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 7 error locations. Result: SAFE, OverallTime: 54.4s, OverallIterations: 28, TraceHistogramMax: 11, AutomataDifference: 30.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 545 SDtfs, 1741 SDslu, 4265 SDs, 0 SdLazy, 19733 SolverSat, 575 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 18.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1693 GetRequests, 805 SyntacticMatches, 23 SemanticMatches, 865 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6366 ImplicationChecksByTransitivity, 24.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 93 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 2101 NumberOfCodeBlocks, 2079 NumberOfCodeBlocksAsserted, 113 NumberOfCheckSat, 2054 ConstructedInterpolants, 90 QuantifiedInterpolants, 1174408 SizeOfPredicates, 155 NumberOfNonLiveVariables, 3552 ConjunctsInSsa, 886 ConjunctsInUnsatCore, 47 InterpolantComputations, 9 PerfectInterpolantSequences, 1589/5244 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...