./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:10:56,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:10:56,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:10:56,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:10:56,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:10:56,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:10:56,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:10:56,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:10:56,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:10:56,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:10:56,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:10:56,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:10:56,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:10:56,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:10:56,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:10:56,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:10:56,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:10:56,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:10:56,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:10:56,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:10:56,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:10:56,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:10:56,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:10:56,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:10:56,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:10:56,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:10:56,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:10:56,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:10:56,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:10:56,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:10:56,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:10:56,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:10:56,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:10:56,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:10:56,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:10:56,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:10:56,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:10:56,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:10:56,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:10:56,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:10:56,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:10:56,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-12-07 18:10:56,076 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:10:56,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:10:56,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:10:56,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:10:56,078 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:10:56,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:10:56,078 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:10:56,078 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 18:10:56,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:10:56,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:10:56,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:10:56,079 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 18:10:56,079 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 18:10:56,079 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 18:10:56,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:10:56,079 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 18:10:56,079 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:10:56,079 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:10:56,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:10:56,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:10:56,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:10:56,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:10:56,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:10:56,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:10:56,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:10:56,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:10:56,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:10:56,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:10:56,081 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_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2019-12-07 18:10:56,178 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:10:56,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:10:56,190 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:10:56,191 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:10:56,191 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:10:56,191 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2019-12-07 18:10:56,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/data/3d5867a77/d576792b215245c08a600f06adfb9774/FLAG7c51c355a [2019-12-07 18:10:56,710 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:10:56,711 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2019-12-07 18:10:56,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/data/3d5867a77/d576792b215245c08a600f06adfb9774/FLAG7c51c355a [2019-12-07 18:10:56,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/data/3d5867a77/d576792b215245c08a600f06adfb9774 [2019-12-07 18:10:56,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:10:56,731 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 18:10:56,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:10:56,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:10:56,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:10:56,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:10:56" (1/1) ... [2019-12-07 18:10:56,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11acb7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:56, skipping insertion in model container [2019-12-07 18:10:56,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:10:56" (1/1) ... [2019-12-07 18:10:56,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:10:56,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:10:56,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:10:56,967 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:10:56,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:10:57,024 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:10:57,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57 WrapperNode [2019-12-07 18:10:57,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:10:57,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:10:57,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:10:57,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:10:57,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (1/1) ... [2019-12-07 18:10:57,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (1/1) ... [2019-12-07 18:10:57,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (1/1) ... [2019-12-07 18:10:57,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (1/1) ... [2019-12-07 18:10:57,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (1/1) ... [2019-12-07 18:10:57,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (1/1) ... [2019-12-07 18:10:57,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (1/1) ... [2019-12-07 18:10:57,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:10:57,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:10:57,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:10:57,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:10:57,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:10:57,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 18:10:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:10:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-12-07 18:10:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-12-07 18:10:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-12-07 18:10:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-12-07 18:10:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-12-07 18:10:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrnlen [2019-12-07 18:10:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 18:10:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-12-07 18:10:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-12-07 18:10:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-12-07 18:10:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-12-07 18:10:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-12-07 18:10:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-12-07 18:10:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-12-07 18:10:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-12-07 18:10:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-12-07 18:10:57,109 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure cstrnlen [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 18:10:57,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 18:10:57,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 18:10:57,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 18:10:57,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 18:10:57,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:10:57,352 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:10:57,352 INFO L287 CfgBuilder]: Removed 2 assume(true) statements. [2019-12-07 18:10:57,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:10:57 BoogieIcfgContainer [2019-12-07 18:10:57,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:10:57,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:10:57,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:10:57,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:10:57,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:10:56" (1/3) ... [2019-12-07 18:10:57,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6e78e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:10:57, skipping insertion in model container [2019-12-07 18:10:57,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:10:57" (2/3) ... [2019-12-07 18:10:57,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6e78e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:10:57, skipping insertion in model container [2019-12-07 18:10:57,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:10:57" (3/3) ... [2019-12-07 18:10:57,357 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2019-12-07 18:10:57,363 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:10:57,367 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-12-07 18:10:57,375 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-12-07 18:10:57,387 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:10:57,387 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 18:10:57,387 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:10:57,387 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:10:57,387 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:10:57,387 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:10:57,387 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:10:57,387 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:10:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-12-07 18:10:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:10:57,402 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:57,403 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:57,403 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash 787746653, now seen corresponding path program 1 times [2019-12-07 18:10:57,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:57,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632416532] [2019-12-07 18:10:57,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:57,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632416532] [2019-12-07 18:10:57,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:57,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:10:57,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445558283] [2019-12-07 18:10:57,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 18:10:57,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:10:57,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:10:57,531 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2019-12-07 18:10:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:57,580 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-12-07 18:10:57,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:10:57,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-07 18:10:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:57,589 INFO L225 Difference]: With dead ends: 37 [2019-12-07 18:10:57,589 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 18:10:57,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:10:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 18:10:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-07 18:10:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 18:10:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-12-07 18:10:57,619 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2019-12-07 18:10:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:57,619 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-12-07 18:10:57,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 18:10:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-12-07 18:10:57,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:10:57,620 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:57,620 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:57,620 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash 787746343, now seen corresponding path program 1 times [2019-12-07 18:10:57,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:57,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434443208] [2019-12-07 18:10:57,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:57,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434443208] [2019-12-07 18:10:57,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:57,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:10:57,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705961254] [2019-12-07 18:10:57,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:10:57,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:57,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:10:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:10:57,665 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2019-12-07 18:10:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:57,713 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-12-07 18:10:57,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:10:57,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-12-07 18:10:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:57,715 INFO L225 Difference]: With dead ends: 32 [2019-12-07 18:10:57,715 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 18:10:57,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:10:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 18:10:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 18:10:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 18:10:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-12-07 18:10:57,718 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2019-12-07 18:10:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:57,719 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-12-07 18:10:57,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:10:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-12-07 18:10:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:10:57,719 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:57,719 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:57,719 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash 787746344, now seen corresponding path program 1 times [2019-12-07 18:10:57,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:57,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754472505] [2019-12-07 18:10:57,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:57,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754472505] [2019-12-07 18:10:57,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:57,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:10:57,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727379896] [2019-12-07 18:10:57,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:10:57,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:10:57,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:10:57,770 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2019-12-07 18:10:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:57,820 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-12-07 18:10:57,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:10:57,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 18:10:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:57,820 INFO L225 Difference]: With dead ends: 31 [2019-12-07 18:10:57,821 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 18:10:57,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:10:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 18:10:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-12-07 18:10:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 18:10:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-12-07 18:10:57,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 11 [2019-12-07 18:10:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:57,824 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-12-07 18:10:57,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:10:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-12-07 18:10:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:10:57,824 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:57,824 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:57,825 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 787746397, now seen corresponding path program 1 times [2019-12-07 18:10:57,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:57,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241421791] [2019-12-07 18:10:57,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:57,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241421791] [2019-12-07 18:10:57,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:57,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:10:57,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128464857] [2019-12-07 18:10:57,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:10:57,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:57,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:10:57,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:10:57,860 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2019-12-07 18:10:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:57,908 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-12-07 18:10:57,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:10:57,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 18:10:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:57,910 INFO L225 Difference]: With dead ends: 39 [2019-12-07 18:10:57,910 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 18:10:57,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:10:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 18:10:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2019-12-07 18:10:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 18:10:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-12-07 18:10:57,917 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2019-12-07 18:10:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:57,917 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-12-07 18:10:57,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:10:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-12-07 18:10:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:10:57,918 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:57,918 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:57,918 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:57,918 INFO L82 PathProgramCache]: Analyzing trace with hash 789593439, now seen corresponding path program 1 times [2019-12-07 18:10:57,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:57,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309123143] [2019-12-07 18:10:57,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:57,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309123143] [2019-12-07 18:10:57,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:57,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:10:57,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702553062] [2019-12-07 18:10:57,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:10:57,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:57,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:10:57,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:10:57,963 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2019-12-07 18:10:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:58,028 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-12-07 18:10:58,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:10:58,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 18:10:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:58,029 INFO L225 Difference]: With dead ends: 43 [2019-12-07 18:10:58,030 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 18:10:58,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:10:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 18:10:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2019-12-07 18:10:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 18:10:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-12-07 18:10:58,033 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2019-12-07 18:10:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:58,033 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-12-07 18:10:58,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:10:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-12-07 18:10:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:10:58,034 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:58,034 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:58,034 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:58,034 INFO L82 PathProgramCache]: Analyzing trace with hash 849748688, now seen corresponding path program 1 times [2019-12-07 18:10:58,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:58,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98085672] [2019-12-07 18:10:58,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:58,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98085672] [2019-12-07 18:10:58,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:58,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:10:58,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362184506] [2019-12-07 18:10:58,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:10:58,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:58,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:10:58,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:10:58,080 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2019-12-07 18:10:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:58,155 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-12-07 18:10:58,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:10:58,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-12-07 18:10:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:58,156 INFO L225 Difference]: With dead ends: 35 [2019-12-07 18:10:58,156 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 18:10:58,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:10:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 18:10:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 18:10:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 18:10:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-12-07 18:10:58,160 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2019-12-07 18:10:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:58,160 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-12-07 18:10:58,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:10:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-12-07 18:10:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:10:58,161 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:58,161 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:58,161 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:58,161 INFO L82 PathProgramCache]: Analyzing trace with hash 849748689, now seen corresponding path program 1 times [2019-12-07 18:10:58,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:58,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181815621] [2019-12-07 18:10:58,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:58,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181815621] [2019-12-07 18:10:58,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:58,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 18:10:58,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143910015] [2019-12-07 18:10:58,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:10:58,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:10:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:10:58,236 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2019-12-07 18:10:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:58,351 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-12-07 18:10:58,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:10:58,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-12-07 18:10:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:58,353 INFO L225 Difference]: With dead ends: 44 [2019-12-07 18:10:58,353 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 18:10:58,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:10:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 18:10:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-12-07 18:10:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 18:10:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-12-07 18:10:58,357 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2019-12-07 18:10:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:58,357 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-12-07 18:10:58,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:10:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-12-07 18:10:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:10:58,358 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:58,358 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:58,358 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2015068958, now seen corresponding path program 1 times [2019-12-07 18:10:58,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:58,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62956166] [2019-12-07 18:10:58,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:58,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62956166] [2019-12-07 18:10:58,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103891533] [2019-12-07 18:10:58,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:10:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 18:10:58,491 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:10:58,527 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 18:10:58,527 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:10:58,532 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:10:58,532 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:10:58,532 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:10:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:58,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:10:58,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-12-07 18:10:58,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926323036] [2019-12-07 18:10:58,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:10:58,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:58,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:10:58,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:10:58,544 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2019-12-07 18:10:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:58,614 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-12-07 18:10:58,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:10:58,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-12-07 18:10:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:58,614 INFO L225 Difference]: With dead ends: 44 [2019-12-07 18:10:58,615 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 18:10:58,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:10:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 18:10:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2019-12-07 18:10:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 18:10:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-12-07 18:10:58,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2019-12-07 18:10:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:58,618 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-12-07 18:10:58,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:10:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-12-07 18:10:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 18:10:58,618 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:58,619 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:58,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:10:58,820 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1695397446, now seen corresponding path program 1 times [2019-12-07 18:10:58,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:58,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123128503] [2019-12-07 18:10:58,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:58,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123128503] [2019-12-07 18:10:58,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:58,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:10:58,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466620425] [2019-12-07 18:10:58,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:10:58,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:58,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:10:58,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:10:58,880 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2019-12-07 18:10:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:58,939 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-12-07 18:10:58,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:10:58,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-12-07 18:10:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:58,940 INFO L225 Difference]: With dead ends: 36 [2019-12-07 18:10:58,940 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 18:10:58,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:10:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 18:10:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-07 18:10:58,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 18:10:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-12-07 18:10:58,944 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2019-12-07 18:10:58,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:58,945 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-12-07 18:10:58,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:10:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-12-07 18:10:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 18:10:58,946 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:58,946 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:58,946 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash 964873536, now seen corresponding path program 1 times [2019-12-07 18:10:58,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:58,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527050621] [2019-12-07 18:10:58,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:59,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527050621] [2019-12-07 18:10:59,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:59,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 18:10:59,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394982436] [2019-12-07 18:10:59,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:10:59,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:10:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:10:59,010 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2019-12-07 18:10:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:59,111 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2019-12-07 18:10:59,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:10:59,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-12-07 18:10:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:59,112 INFO L225 Difference]: With dead ends: 58 [2019-12-07 18:10:59,112 INFO L226 Difference]: Without dead ends: 58 [2019-12-07 18:10:59,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:10:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-07 18:10:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2019-12-07 18:10:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-07 18:10:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-12-07 18:10:59,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 21 [2019-12-07 18:10:59,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:59,117 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-12-07 18:10:59,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:10:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-12-07 18:10:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 18:10:59,118 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:59,118 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:59,118 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -46243714, now seen corresponding path program 1 times [2019-12-07 18:10:59,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:59,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179330519] [2019-12-07 18:10:59,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:59,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179330519] [2019-12-07 18:10:59,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:10:59,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-12-07 18:10:59,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885696579] [2019-12-07 18:10:59,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:10:59,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:10:59,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:10:59,189 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-12-07 18:10:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:59,316 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2019-12-07 18:10:59,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:10:59,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-12-07 18:10:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:59,317 INFO L225 Difference]: With dead ends: 55 [2019-12-07 18:10:59,317 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 18:10:59,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:10:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 18:10:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2019-12-07 18:10:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 18:10:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-12-07 18:10:59,321 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2019-12-07 18:10:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:59,321 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-12-07 18:10:59,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:10:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-12-07 18:10:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 18:10:59,322 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:59,322 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:59,323 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1827219927, now seen corresponding path program 1 times [2019-12-07 18:10:59,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:59,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361817906] [2019-12-07 18:10:59,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:59,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361817906] [2019-12-07 18:10:59,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816847267] [2019-12-07 18:10:59,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:10:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 18:10:59,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:10:59,458 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 18:10:59,458 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:10:59,459 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:10:59,460 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:10:59,460 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-12-07 18:10:59,495 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 18:10:59,495 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:10:59,496 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:10:59,497 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:10:59,497 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 18:10:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:59,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:10:59,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2019-12-07 18:10:59,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016146627] [2019-12-07 18:10:59,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:10:59,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:10:59,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:10:59,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:10:59,510 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2019-12-07 18:10:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:10:59,589 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-12-07 18:10:59,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:10:59,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-12-07 18:10:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:10:59,590 INFO L225 Difference]: With dead ends: 50 [2019-12-07 18:10:59,590 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 18:10:59,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:10:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 18:10:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-07 18:10:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 18:10:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-12-07 18:10:59,592 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 22 [2019-12-07 18:10:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:10:59,593 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-12-07 18:10:59,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:10:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-12-07 18:10:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 18:10:59,593 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:10:59,593 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:10:59,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:10:59,794 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:10:59,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:10:59,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1446679015, now seen corresponding path program 1 times [2019-12-07 18:10:59,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:10:59,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319284945] [2019-12-07 18:10:59,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:10:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:10:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:10:59,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319284945] [2019-12-07 18:10:59,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48513556] [2019-12-07 18:10:59,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:00,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 18:11:00,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:00,048 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 18:11:00,049 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:00,054 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:00,055 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:11:00,055 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2019-12-07 18:11:00,119 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 18:11:00,121 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:00,121 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2019-12-07 18:11:00,121 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:00,127 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:00,128 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:00,129 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:3 [2019-12-07 18:11:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:00,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:11:00,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 15 [2019-12-07 18:11:00,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919575344] [2019-12-07 18:11:00,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:11:00,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:00,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:11:00,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:11:00,142 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 10 states. [2019-12-07 18:11:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:00,319 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-12-07 18:11:00,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:11:00,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-12-07 18:11:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:00,320 INFO L225 Difference]: With dead ends: 65 [2019-12-07 18:11:00,320 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 18:11:00,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:11:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 18:11:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2019-12-07 18:11:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 18:11:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2019-12-07 18:11:00,323 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2019-12-07 18:11:00,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:00,323 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2019-12-07 18:11:00,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:11:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2019-12-07 18:11:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 18:11:00,324 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:00,324 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:00,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:00,525 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash -862082627, now seen corresponding path program 1 times [2019-12-07 18:11:00,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:00,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955909832] [2019-12-07 18:11:00,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:00,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955909832] [2019-12-07 18:11:00,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:11:00,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:11:00,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593566550] [2019-12-07 18:11:00,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:11:00,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:00,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:11:00,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:11:00,590 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 5 states. [2019-12-07 18:11:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:00,642 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-12-07 18:11:00,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:11:00,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-12-07 18:11:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:00,643 INFO L225 Difference]: With dead ends: 47 [2019-12-07 18:11:00,643 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 18:11:00,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:11:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 18:11:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-12-07 18:11:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 18:11:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-12-07 18:11:00,646 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2019-12-07 18:11:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:00,646 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-12-07 18:11:00,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:11:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-12-07 18:11:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 18:11:00,647 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:00,647 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:00,647 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:00,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1736404348, now seen corresponding path program 1 times [2019-12-07 18:11:00,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:00,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123377593] [2019-12-07 18:11:00,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:00,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123377593] [2019-12-07 18:11:00,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29013559] [2019-12-07 18:11:00,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:00,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 18:11:00,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:00,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:00,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-12-07 18:11:00,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750217742] [2019-12-07 18:11:00,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:11:00,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:00,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:11:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:11:00,895 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 16 states. [2019-12-07 18:11:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:01,088 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-12-07 18:11:01,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:11:01,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-12-07 18:11:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:01,089 INFO L225 Difference]: With dead ends: 36 [2019-12-07 18:11:01,089 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 18:11:01,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-12-07 18:11:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 18:11:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-12-07 18:11:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 18:11:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-12-07 18:11:01,091 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2019-12-07 18:11:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:01,091 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-12-07 18:11:01,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:11:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-12-07 18:11:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 18:11:01,092 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:01,092 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:01,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:01,293 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:01,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2115859356, now seen corresponding path program 2 times [2019-12-07 18:11:01,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:01,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662488077] [2019-12-07 18:11:01,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:11:01,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662488077] [2019-12-07 18:11:01,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422259712] [2019-12-07 18:11:01,616 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:01,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:11:01,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:11:01,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 18:11:01,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:01,737 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 18:11:01,738 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:01,743 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:01,743 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:11:01,743 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-12-07 18:11:01,831 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:01,831 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-12-07 18:11:01,832 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:11:01,838 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:01,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:01,840 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:01,841 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2019-12-07 18:11:01,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:01,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:01,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-12-07 18:11:01,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309838594] [2019-12-07 18:11:01,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 18:11:01,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 18:11:01,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:11:01,932 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 18 states. [2019-12-07 18:11:03,330 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2019-12-07 18:11:03,591 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-12-07 18:11:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:04,051 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-12-07 18:11:04,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 18:11:04,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2019-12-07 18:11:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:04,052 INFO L225 Difference]: With dead ends: 59 [2019-12-07 18:11:04,052 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 18:11:04,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 18:11:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 18:11:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-12-07 18:11:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 18:11:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-12-07 18:11:04,054 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2019-12-07 18:11:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:04,055 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-12-07 18:11:04,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 18:11:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-12-07 18:11:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 18:11:04,055 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:04,055 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:04,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:04,257 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:04,258 INFO L82 PathProgramCache]: Analyzing trace with hash 942977846, now seen corresponding path program 1 times [2019-12-07 18:11:04,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:04,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119921632] [2019-12-07 18:11:04,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:04,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119921632] [2019-12-07 18:11:04,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124507136] [2019-12-07 18:11:04,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:04,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 18:11:04,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:04,439 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 18:11:04,439 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:04,442 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:04,442 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:04,442 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-12-07 18:11:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:04,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:04,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-12-07 18:11:04,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702413982] [2019-12-07 18:11:04,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 18:11:04,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:04,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 18:11:04,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:11:04,527 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 19 states. [2019-12-07 18:11:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:04,724 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2019-12-07 18:11:04,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:11:04,725 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2019-12-07 18:11:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:04,725 INFO L225 Difference]: With dead ends: 64 [2019-12-07 18:11:04,725 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 18:11:04,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-12-07 18:11:04,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 18:11:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2019-12-07 18:11:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-07 18:11:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-12-07 18:11:04,728 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2019-12-07 18:11:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:04,728 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-12-07 18:11:04,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 18:11:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-12-07 18:11:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-07 18:11:04,729 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:04,729 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:04,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:04,929 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1250412755, now seen corresponding path program 2 times [2019-12-07 18:11:04,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:04,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608166553] [2019-12-07 18:11:04,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:05,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608166553] [2019-12-07 18:11:05,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991756101] [2019-12-07 18:11:05,092 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:05,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:11:05,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:11:05,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 18:11:05,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:05,210 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 18:11:05,210 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:05,216 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:05,217 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:11:05,217 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-12-07 18:11:05,390 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:05,390 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-12-07 18:11:05,390 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:11:05,399 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:05,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:05,400 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:05,400 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2019-12-07 18:11:05,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:05,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:05,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2019-12-07 18:11:05,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444624454] [2019-12-07 18:11:05,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 18:11:05,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 18:11:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2019-12-07 18:11:05,524 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 27 states. [2019-12-07 18:11:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:09,267 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2019-12-07 18:11:09,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-07 18:11:09,267 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2019-12-07 18:11:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:09,268 INFO L225 Difference]: With dead ends: 79 [2019-12-07 18:11:09,268 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 18:11:09,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 18:11:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 18:11:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2019-12-07 18:11:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 18:11:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-12-07 18:11:09,270 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 42 [2019-12-07 18:11:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:09,271 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-12-07 18:11:09,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 18:11:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-12-07 18:11:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-07 18:11:09,272 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:09,272 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:09,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:09,473 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:09,474 INFO L82 PathProgramCache]: Analyzing trace with hash -873535480, now seen corresponding path program 3 times [2019-12-07 18:11:09,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:09,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373845339] [2019-12-07 18:11:09,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:09,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373845339] [2019-12-07 18:11:09,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816134322] [2019-12-07 18:11:09,651 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:09,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 18:11:09,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:11:09,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 18:11:09,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:09,836 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 18:11:09,836 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:09,840 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:09,840 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:11:09,840 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 18:11:09,937 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 18:11:09,937 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:09,938 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:09,938 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:09,939 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 18:11:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:09,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:09,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2019-12-07 18:11:09,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078531085] [2019-12-07 18:11:09,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 18:11:09,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:09,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 18:11:09,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2019-12-07 18:11:09,945 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 26 states. [2019-12-07 18:11:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:10,549 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2019-12-07 18:11:10,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 18:11:10,550 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2019-12-07 18:11:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:10,550 INFO L225 Difference]: With dead ends: 86 [2019-12-07 18:11:10,550 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 18:11:10,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 18:11:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 18:11:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-12-07 18:11:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 18:11:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-12-07 18:11:10,552 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2019-12-07 18:11:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:10,552 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-12-07 18:11:10,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 18:11:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-12-07 18:11:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-07 18:11:10,553 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:10,553 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:10,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:10,754 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:10,755 INFO L82 PathProgramCache]: Analyzing trace with hash -330733851, now seen corresponding path program 4 times [2019-12-07 18:11:10,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:10,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228453497] [2019-12-07 18:11:10,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:10,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228453497] [2019-12-07 18:11:10,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591187653] [2019-12-07 18:11:10,954 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:11,032 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:11:11,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:11:11,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 18:11:11,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:11,042 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 18:11:11,042 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:11,048 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:11,048 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:11,048 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:11:11,080 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 18:11:11,081 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:11,086 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:11,086 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:11,087 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 18:11:11,257 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:11,257 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2019-12-07 18:11:11,257 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:11:11,265 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:11,266 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:11,266 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2019-12-07 18:11:11,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:11,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:11,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2019-12-07 18:11:11,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182114650] [2019-12-07 18:11:11,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 18:11:11,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:11,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 18:11:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2019-12-07 18:11:11,379 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 28 states. [2019-12-07 18:11:12,684 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2019-12-07 18:11:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:13,455 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-12-07 18:11:13,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 18:11:13,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2019-12-07 18:11:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:13,458 INFO L225 Difference]: With dead ends: 66 [2019-12-07 18:11:13,458 INFO L226 Difference]: Without dead ends: 66 [2019-12-07 18:11:13,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 18:11:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-07 18:11:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2019-12-07 18:11:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-07 18:11:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-12-07 18:11:13,465 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 56 [2019-12-07 18:11:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:13,466 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-12-07 18:11:13,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 18:11:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-12-07 18:11:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-12-07 18:11:13,468 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:13,468 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:13,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:13,670 INFO L410 AbstractCegarLoop]: === Iteration 21 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1875657923, now seen corresponding path program 5 times [2019-12-07 18:11:13,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:13,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223102471] [2019-12-07 18:11:13,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:13,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223102471] [2019-12-07 18:11:13,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746412982] [2019-12-07 18:11:13,914 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:13,984 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 18:11:13,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:11:13,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-07 18:11:13,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:14,111 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 18:11:14,111 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:14,116 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:14,116 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:11:14,117 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2019-12-07 18:11:14,313 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 18:11:14,313 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:14,314 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:14,314 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:14,314 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-12-07 18:11:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:14,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:14,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2019-12-07 18:11:14,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391302032] [2019-12-07 18:11:14,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 18:11:14,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:14,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 18:11:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 18:11:14,323 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 33 states. [2019-12-07 18:11:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:14,951 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2019-12-07 18:11:14,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 18:11:14,951 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 62 [2019-12-07 18:11:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:14,952 INFO L225 Difference]: With dead ends: 102 [2019-12-07 18:11:14,952 INFO L226 Difference]: Without dead ends: 70 [2019-12-07 18:11:14,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 18:11:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-07 18:11:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2019-12-07 18:11:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-07 18:11:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2019-12-07 18:11:14,954 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2019-12-07 18:11:14,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:14,955 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2019-12-07 18:11:14,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 18:11:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2019-12-07 18:11:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-12-07 18:11:14,955 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:14,955 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:15,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:15,157 INFO L410 AbstractCegarLoop]: === Iteration 22 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1586034214, now seen corresponding path program 6 times [2019-12-07 18:11:15,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:15,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401332474] [2019-12-07 18:11:15,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:15,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401332474] [2019-12-07 18:11:15,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86572046] [2019-12-07 18:11:15,369 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:15,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-07 18:11:15,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:11:15,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 18:11:15,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:15,450 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 18:11:15,451 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:15,455 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:15,455 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:15,455 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:11:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:15,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:15,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2019-12-07 18:11:15,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334573034] [2019-12-07 18:11:15,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-07 18:11:15,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:15,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-07 18:11:15,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2019-12-07 18:11:15,691 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 32 states. [2019-12-07 18:11:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:16,217 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2019-12-07 18:11:16,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 18:11:16,217 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2019-12-07 18:11:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:16,217 INFO L225 Difference]: With dead ends: 76 [2019-12-07 18:11:16,217 INFO L226 Difference]: Without dead ends: 76 [2019-12-07 18:11:16,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 18:11:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-07 18:11:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-12-07 18:11:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-12-07 18:11:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2019-12-07 18:11:16,220 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 66 [2019-12-07 18:11:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:16,220 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2019-12-07 18:11:16,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-07 18:11:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2019-12-07 18:11:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-12-07 18:11:16,220 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:16,220 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:16,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:16,421 INFO L410 AbstractCegarLoop]: === Iteration 23 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:16,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1098289778, now seen corresponding path program 7 times [2019-12-07 18:11:16,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:16,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414109441] [2019-12-07 18:11:16,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:16,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414109441] [2019-12-07 18:11:16,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824067199] [2019-12-07 18:11:16,715 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:16,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 49 conjunts are in the unsatisfiable core [2019-12-07 18:11:16,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:16,929 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 18:11:16,929 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:16,934 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:16,934 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 18:11:16,935 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-12-07 18:11:17,288 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:17,288 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-12-07 18:11:17,288 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:11:17,296 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:17,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:17,298 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:17,298 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:31 [2019-12-07 18:11:17,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:17,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:17,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2019-12-07 18:11:17,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681103373] [2019-12-07 18:11:17,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-07 18:11:17,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-07 18:11:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 18:11:17,471 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 40 states. [2019-12-07 18:11:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:23,735 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2019-12-07 18:11:23,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-07 18:11:23,736 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 72 [2019-12-07 18:11:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:23,736 INFO L225 Difference]: With dead ends: 127 [2019-12-07 18:11:23,736 INFO L226 Difference]: Without dead ends: 89 [2019-12-07 18:11:23,737 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=362, Invalid=4060, Unknown=0, NotChecked=0, Total=4422 [2019-12-07 18:11:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-07 18:11:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2019-12-07 18:11:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 18:11:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-12-07 18:11:23,739 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 72 [2019-12-07 18:11:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:23,739 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-12-07 18:11:23,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-07 18:11:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-12-07 18:11:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-12-07 18:11:23,740 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:23,740 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:23,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:23,941 INFO L410 AbstractCegarLoop]: === Iteration 24 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1015562841, now seen corresponding path program 8 times [2019-12-07 18:11:23,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:23,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388677972] [2019-12-07 18:11:23,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:24,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388677972] [2019-12-07 18:11:24,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787964151] [2019-12-07 18:11:24,270 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:24,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:11:24,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:11:24,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 60 conjunts are in the unsatisfiable core [2019-12-07 18:11:24,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:24,339 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 18:11:24,340 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:24,345 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:24,345 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:24,345 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 18:11:24,512 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 18:11:24,512 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:24,516 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:24,516 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:24,517 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 18:11:24,832 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:24,832 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2019-12-07 18:11:24,832 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:11:24,837 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:24,837 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:24,838 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2019-12-07 18:11:24,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 45 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:25,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:25,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 43 [2019-12-07 18:11:25,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363472315] [2019-12-07 18:11:25,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 18:11:25,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:25,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 18:11:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1705, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 18:11:25,027 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 43 states. [2019-12-07 18:11:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:29,848 INFO L93 Difference]: Finished difference Result 143 states and 144 transitions. [2019-12-07 18:11:29,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-07 18:11:29,848 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 82 [2019-12-07 18:11:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:29,849 INFO L225 Difference]: With dead ends: 143 [2019-12-07 18:11:29,849 INFO L226 Difference]: Without dead ends: 99 [2019-12-07 18:11:29,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=406, Invalid=5446, Unknown=0, NotChecked=0, Total=5852 [2019-12-07 18:11:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-07 18:11:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2019-12-07 18:11:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-07 18:11:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2019-12-07 18:11:29,852 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 82 [2019-12-07 18:11:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:29,852 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2019-12-07 18:11:29,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 18:11:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2019-12-07 18:11:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-12-07 18:11:29,853 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:11:29,853 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:11:30,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:30,054 INFO L410 AbstractCegarLoop]: === Iteration 25 === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 18:11:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:11:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1217891548, now seen corresponding path program 9 times [2019-12-07 18:11:30,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:11:30,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209355551] [2019-12-07 18:11:30,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:11:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:11:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:11:30,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209355551] [2019-12-07 18:11:30,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266359787] [2019-12-07 18:11:30,450 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:30,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-07 18:11:30,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:11:30,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-07 18:11:30,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:11:30,581 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 18:11:30,582 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:30,584 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:30,584 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:30,584 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-12-07 18:11:30,607 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 18:11:30,607 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 18:11:30,609 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:30,609 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:30,609 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-12-07 18:11:30,681 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:30,682 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2019-12-07 18:11:30,682 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 18:11:30,687 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 18:11:30,688 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 18:11:30,688 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2019-12-07 18:11:30,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:11:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2019-12-07 18:11:30,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:11:30,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 33 [2019-12-07 18:11:30,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396759103] [2019-12-07 18:11:30,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 18:11:30,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:11:30,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 18:11:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=990, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 18:11:30,829 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 33 states. [2019-12-07 18:11:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:11:34,204 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2019-12-07 18:11:34,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-07 18:11:34,204 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 92 [2019-12-07 18:11:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:11:34,205 INFO L225 Difference]: With dead ends: 149 [2019-12-07 18:11:34,205 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:11:34,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=763, Invalid=6547, Unknown=0, NotChecked=0, Total=7310 [2019-12-07 18:11:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:11:34,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:11:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:11:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:11:34,207 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2019-12-07 18:11:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:11:34,207 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:11:34,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 18:11:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:11:34,207 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:11:34,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:11:34,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:11:34 BoogieIcfgContainer [2019-12-07 18:11:34,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:11:34,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:11:34,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:11:34,420 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:11:34,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:10:57" (3/4) ... [2019-12-07 18:11:34,424 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:11:34,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-12-07 18:11:34,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-12-07 18:11:34,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrnlen [2019-12-07 18:11:34,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-12-07 18:11:34,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-12-07 18:11:34,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-12-07 18:11:34,428 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-12-07 18:11:34,429 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-12-07 18:11:34,431 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2019-12-07 18:11:34,432 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-12-07 18:11:34,432 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 18:11:34,432 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 18:11:34,458 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_484091c5-9568-4127-84a5-58eda10b040e/bin/uautomizer/witness.graphml [2019-12-07 18:11:34,458 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:11:34,459 INFO L168 Benchmark]: Toolchain (without parser) took 37727.91 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 320.3 MB). Free memory was 938.2 MB in the beginning and 848.6 MB in the end (delta: 89.6 MB). Peak memory consumption was 409.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:11:34,459 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:11:34,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.21 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.6 MB). Free memory was 938.2 MB in the beginning and 1.1 GB in the end (delta: -145.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:11:34,460 INFO L168 Benchmark]: Boogie Preprocessor took 35.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:11:34,460 INFO L168 Benchmark]: RCFGBuilder took 291.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:11:34,460 INFO L168 Benchmark]: TraceAbstraction took 37065.55 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 220.7 MB). Free memory was 1.0 GB in the beginning and 852.0 MB in the end (delta: 181.8 MB). Peak memory consumption was 402.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:11:34,461 INFO L168 Benchmark]: Witness Printer took 38.45 ms. Allocated memory is still 1.3 GB. Free memory was 852.0 MB in the beginning and 848.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:11:34,462 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 293.21 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.6 MB). Free memory was 938.2 MB in the beginning and 1.1 GB in the end (delta: -145.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 291.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 37065.55 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 220.7 MB). Free memory was 1.0 GB in the beginning and 852.0 MB in the end (delta: 181.8 MB). Peak memory consumption was 402.5 MB. Max. memory is 11.5 GB. * Witness Printer took 38.45 ms. Allocated memory is still 1.3 GB. Free memory was 852.0 MB in the beginning and 848.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 7 error locations. Result: SAFE, OverallTime: 37.0s, OverallIterations: 25, TraceHistogramMax: 9, AutomataDifference: 25.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 691 SDtfs, 1909 SDslu, 2266 SDs, 0 SdLazy, 12143 SolverSat, 366 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 12.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1190 GetRequests, 585 SyntacticMatches, 13 SemanticMatches, 592 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4212 ImplicationChecksByTransitivity, 16.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 25 MinimizatonAttempts, 110 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 1530 NumberOfCodeBlocks, 1520 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1491 ConstructedInterpolants, 81 QuantifiedInterpolants, 805813 SizeOfPredicates, 128 NumberOfNonLiveVariables, 2310 ConjunctsInSsa, 481 ConjunctsInUnsatCore, 39 InterpolantComputations, 13 PerfectInterpolantSequences, 634/2196 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...