./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be --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 c60dc3ce59c2c65912da9b7b458247bdc42b4524b29b39bec7ce63758c18c031 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:27:40,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:27:40,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:27:40,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:27:40,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:27:40,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:27:40,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:27:40,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:27:40,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:27:40,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:27:40,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:27:40,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:27:40,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:27:40,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:27:40,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:27:40,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:27:40,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:27:40,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:27:40,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:27:40,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:27:40,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:27:40,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:27:40,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:27:40,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:27:40,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:27:40,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:27:40,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:27:40,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:27:40,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:27:40,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:27:40,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:27:40,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:27:40,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:27:40,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:27:40,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:27:40,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:27:40,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:27:40,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:27:40,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:27:40,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:27:40,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:27:40,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:27:41,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:27:41,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:27:41,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:27:41,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:27:41,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:27:41,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:27:41,047 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:27:41,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:27:41,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:27:41,048 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:27:41,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:27:41,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:27:41,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:27:41,051 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:27:41,051 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:27:41,051 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:27:41,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:27:41,052 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:27:41,052 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:27:41,052 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:27:41,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:27:41,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:27:41,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:27:41,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:27:41,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:27:41,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:27:41,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:27:41,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:27:41,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:27:41,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60dc3ce59c2c65912da9b7b458247bdc42b4524b29b39bec7ce63758c18c031 [2021-10-21 19:27:41,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:27:41,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:27:41,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:27:41,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:27:41,475 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:27:41,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-10-21 19:27:41,595 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/data/5c5a0ba54/c54dc488412346658534ff7346b95cbe/FLAG8f7891b43 [2021-10-21 19:27:42,240 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:27:42,241 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5.c [2021-10-21 19:27:42,248 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/data/5c5a0ba54/c54dc488412346658534ff7346b95cbe/FLAG8f7891b43 [2021-10-21 19:27:42,605 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/data/5c5a0ba54/c54dc488412346658534ff7346b95cbe [2021-10-21 19:27:42,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:27:42,610 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:27:42,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:27:42,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:27:42,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:27:42,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625269a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42, skipping insertion in model container [2021-10-21 19:27:42,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:27:42,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:27:42,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:27:42,860 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:27:42,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:27:42,906 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:27:42,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42 WrapperNode [2021-10-21 19:27:42,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:27:42,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:27:42,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:27:42,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:27:42,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:27:42,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:27:42,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:27:42,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:27:42,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (1/1) ... [2021-10-21 19:27:42,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:27:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:43,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:27:43,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:27:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:27:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:27:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-10-21 19:27:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:27:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-10-21 19:27:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:27:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:27:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:27:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:27:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:27:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:27:43,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:27:43,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:27:43,413 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 19:27:43,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:27:43 BoogieIcfgContainer [2021-10-21 19:27:43,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:27:43,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:27:43,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:27:43,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:27:43,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:27:42" (1/3) ... [2021-10-21 19:27:43,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477a1856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:27:43, skipping insertion in model container [2021-10-21 19:27:43,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:27:42" (2/3) ... [2021-10-21 19:27:43,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477a1856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:27:43, skipping insertion in model container [2021-10-21 19:27:43,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:27:43" (3/3) ... [2021-10-21 19:27:43,458 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5.c [2021-10-21 19:27:43,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:27:43,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-21 19:27:43,563 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:27:43,578 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:27:43,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-21 19:27:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:27:43,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:43,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:43,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-10-21 19:27:43,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:43,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096621251] [2021-10-21 19:27:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:43,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:43,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:43,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:43,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096621251] [2021-10-21 19:27:43,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096621251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:43,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:43,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:27:43,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830306313] [2021-10-21 19:27:43,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:27:43,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:43,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:27:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:27:44,000 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:27:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:44,292 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-21 19:27:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:27:44,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:27:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:44,309 INFO L225 Difference]: With dead ends: 58 [2021-10-21 19:27:44,310 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:27:44,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:27:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-10-21 19:27:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:27:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-21 19:27:44,352 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-10-21 19:27:44,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:44,353 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-21 19:27:44,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:27:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-21 19:27:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:27:44,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:44,354 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:44,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:27:44,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-10-21 19:27:44,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:44,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875559705] [2021-10-21 19:27:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:44,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:44,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:44,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:44,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875559705] [2021-10-21 19:27:44,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875559705] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:44,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:44,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:27:44,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740735728] [2021-10-21 19:27:44,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:27:44,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:27:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:27:44,482 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:27:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:44,658 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-10-21 19:27:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:27:44,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:27:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:44,661 INFO L225 Difference]: With dead ends: 59 [2021-10-21 19:27:44,661 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 19:27:44,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:27:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 19:27:44,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2021-10-21 19:27:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 38 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-21 19:27:44,671 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2021-10-21 19:27:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:44,672 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-21 19:27:44,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:27:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-21 19:27:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:27:44,673 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:44,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:44,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:27:44,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-10-21 19:27:44,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:44,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426687777] [2021-10-21 19:27:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:44,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:44,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:44,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:44,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:44,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426687777] [2021-10-21 19:27:44,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426687777] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:44,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:44,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:27:44,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816881624] [2021-10-21 19:27:44,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:27:44,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:27:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:27:44,810 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:27:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:44,909 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-10-21 19:27:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:27:44,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-10-21 19:27:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:44,915 INFO L225 Difference]: With dead ends: 43 [2021-10-21 19:27:44,916 INFO L226 Difference]: Without dead ends: 43 [2021-10-21 19:27:44,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:27:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-21 19:27:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-21 19:27:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.3) internal successors, (39), 36 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-10-21 19:27:44,939 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2021-10-21 19:27:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:44,939 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-10-21 19:27:44,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:27:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-10-21 19:27:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:27:44,941 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:44,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:44,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:27:44,943 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:44,944 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2021-10-21 19:27:44,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:44,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917744093] [2021-10-21 19:27:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:44,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:45,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:45,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:45,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:45,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917744093] [2021-10-21 19:27:45,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917744093] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:45,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:45,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:27:45,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208440269] [2021-10-21 19:27:45,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:27:45,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:27:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:45,174 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:27:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:45,311 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-10-21 19:27:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:27:45,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-10-21 19:27:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:45,313 INFO L225 Difference]: With dead ends: 47 [2021-10-21 19:27:45,314 INFO L226 Difference]: Without dead ends: 47 [2021-10-21 19:27:45,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-21 19:27:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-10-21 19:27:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-21 19:27:45,326 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2021-10-21 19:27:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:45,327 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-21 19:27:45,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:27:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-21 19:27:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:27:45,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:45,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:45,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:27:45,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2021-10-21 19:27:45,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:45,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439452794] [2021-10-21 19:27:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:45,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:45,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:45,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:45,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:45,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439452794] [2021-10-21 19:27:45,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439452794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:45,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636830269] [2021-10-21 19:27:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:45,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:45,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:45,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:45,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:27:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:45,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:27:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:45,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636830269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:45,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:45,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 19:27:45,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527006405] [2021-10-21 19:27:45,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:27:45,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:27:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:27:45,810 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:45,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:46,000 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-10-21 19:27:46,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:27:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2021-10-21 19:27:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:46,006 INFO L225 Difference]: With dead ends: 69 [2021-10-21 19:27:46,007 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 19:27:46,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:27:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 19:27:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-10-21 19:27:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-10-21 19:27:46,031 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 21 [2021-10-21 19:27:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:46,035 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-10-21 19:27:46,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-10-21 19:27:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:27:46,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:46,038 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:46,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:46,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:46,252 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1165178250, now seen corresponding path program 1 times [2021-10-21 19:27:46,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:46,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741910573] [2021-10-21 19:27:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:46,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:46,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:46,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:27:46,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:46,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741910573] [2021-10-21 19:27:46,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741910573] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:46,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:27:46,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:27:46,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875837285] [2021-10-21 19:27:46,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:27:46,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:27:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:27:46,315 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:27:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:46,420 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-10-21 19:27:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:27:46,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-10-21 19:27:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:46,425 INFO L225 Difference]: With dead ends: 62 [2021-10-21 19:27:46,425 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:27:46,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:27:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:27:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-10-21 19:27:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 46 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-10-21 19:27:46,439 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 22 [2021-10-21 19:27:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:46,440 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-10-21 19:27:46,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:27:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-10-21 19:27:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:27:46,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:46,443 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:46,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:27:46,444 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2021-10-21 19:27:46,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:46,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502742665] [2021-10-21 19:27:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:46,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:46,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:46,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:27:46,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:46,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502742665] [2021-10-21 19:27:46,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502742665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:46,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885798278] [2021-10-21 19:27:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:46,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:46,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:46,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:27:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:27:46,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:46,767 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:27:46,774 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-10-21 19:27:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:27:46,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885798278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:46,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:46,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 19:27:46,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561107790] [2021-10-21 19:27:46,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:27:46,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:46,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:27:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:27:46,954 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:27:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:47,089 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-10-21 19:27:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:27:47,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-10-21 19:27:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:47,090 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:27:47,091 INFO L226 Difference]: Without dead ends: 53 [2021-10-21 19:27:47,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-21 19:27:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-21 19:27:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 45 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-10-21 19:27:47,103 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 23 [2021-10-21 19:27:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:47,105 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-10-21 19:27:47,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:27:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-10-21 19:27:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:27:47,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:47,108 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:47,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:47,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:27:47,336 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:47,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2021-10-21 19:27:47,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:47,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617468847] [2021-10-21 19:27:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:47,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:47,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:27:47,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:47,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617468847] [2021-10-21 19:27:47,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617468847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:47,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135160968] [2021-10-21 19:27:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:47,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:47,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:47,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:47,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:27:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:27:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:47,638 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:27:47,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:27:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:27:47,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135160968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:47,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:47,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 19:27:47,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821385255] [2021-10-21 19:27:47,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:27:47,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:27:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:27:47,884 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:27:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:48,020 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-10-21 19:27:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:27:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-10-21 19:27:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:48,022 INFO L225 Difference]: With dead ends: 59 [2021-10-21 19:27:48,022 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 19:27:48,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 19:27:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-10-21 19:27:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 46 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-10-21 19:27:48,026 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 23 [2021-10-21 19:27:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:48,027 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-10-21 19:27:48,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-21 19:27:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-10-21 19:27:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:27:48,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:48,028 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:48,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:48,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:48,256 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:48,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2021-10-21 19:27:48,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:48,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056203015] [2021-10-21 19:27:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:48,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:48,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:48,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:48,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:27:48,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:48,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056203015] [2021-10-21 19:27:48,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056203015] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:48,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910876813] [2021-10-21 19:27:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:48,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:48,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:48,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:48,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:27:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:27:48,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:27:48,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910876813] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:48,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:48,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-10-21 19:27:48,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269151070] [2021-10-21 19:27:48,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:27:48,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:27:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:27:48,618 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:48,732 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-10-21 19:27:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:27:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-10-21 19:27:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:48,734 INFO L225 Difference]: With dead ends: 63 [2021-10-21 19:27:48,734 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 19:27:48,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:27:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 19:27:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-10-21 19:27:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 46 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-10-21 19:27:48,740 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2021-10-21 19:27:48,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:48,741 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-10-21 19:27:48,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-10-21 19:27:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:27:48,745 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:48,745 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:48,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:48,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:48,960 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2021-10-21 19:27:48,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:48,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169048367] [2021-10-21 19:27:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:48,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:49,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:49,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:49,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169048367] [2021-10-21 19:27:49,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169048367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:49,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858133451] [2021-10-21 19:27:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:49,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:49,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:49,070 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:49,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:27:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:49,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:27:49,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:27:49,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858133451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:49,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:49,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-10-21 19:27:49,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737419520] [2021-10-21 19:27:49,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:27:49,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:49,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:27:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:49,359 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:49,632 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-10-21 19:27:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:27:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-10-21 19:27:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:49,633 INFO L225 Difference]: With dead ends: 81 [2021-10-21 19:27:49,633 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 19:27:49,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:27:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 19:27:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-10-21 19:27:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.196078431372549) internal successors, (61), 56 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:27:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-10-21 19:27:49,639 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 27 [2021-10-21 19:27:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:49,639 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-10-21 19:27:49,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:27:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-10-21 19:27:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:27:49,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:49,641 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:49,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:49,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:27:49,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:49,864 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2021-10-21 19:27:49,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:49,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356756994] [2021-10-21 19:27:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:49,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:49,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:49,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:49,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:27:50,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:50,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356756994] [2021-10-21 19:27:50,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356756994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:50,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202583900] [2021-10-21 19:27:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:50,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:50,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:50,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:50,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:27:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:27:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:50,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:27:50,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-21 19:27:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:27:50,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202583900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:50,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:50,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-21 19:27:50,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712567016] [2021-10-21 19:27:50,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:27:50,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:27:50,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:50,781 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:27:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:50,971 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-10-21 19:27:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:27:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 31 [2021-10-21 19:27:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:50,973 INFO L225 Difference]: With dead ends: 69 [2021-10-21 19:27:50,973 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 19:27:50,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:27:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 19:27:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-10-21 19:27:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 57 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:27:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-10-21 19:27:50,981 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 31 [2021-10-21 19:27:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:50,981 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-10-21 19:27:50,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:27:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-10-21 19:27:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:27:50,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:50,983 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:51,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:51,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:51,208 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash 894123677, now seen corresponding path program 1 times [2021-10-21 19:27:51,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:51,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337695505] [2021-10-21 19:27:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:51,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:51,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:51,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:51,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:27:51,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:51,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337695505] [2021-10-21 19:27:51,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337695505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:51,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155518971] [2021-10-21 19:27:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:51,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:51,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:51,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:51,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:27:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:27:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:27:51,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155518971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:51,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:51,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-21 19:27:51,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729586355] [2021-10-21 19:27:51,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:27:51,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:27:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:27:51,616 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:27:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:51,823 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-10-21 19:27:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:27:51,824 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2021-10-21 19:27:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:51,825 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:27:51,825 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:27:51,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:27:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-10-21 19:27:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:27:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-10-21 19:27:51,839 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 37 [2021-10-21 19:27:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:51,839 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-10-21 19:27:51,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:27:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-10-21 19:27:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:27:51,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:51,845 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:51,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-21 19:27:52,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:52,064 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:52,064 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2021-10-21 19:27:52,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:52,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576046304] [2021-10-21 19:27:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:52,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:52,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:52,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:52,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-21 19:27:52,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:52,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576046304] [2021-10-21 19:27:52,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576046304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:52,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349740279] [2021-10-21 19:27:52,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:27:52,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:52,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:52,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:27:52,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:27:52,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:52,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:27:52,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:27:52,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349740279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:52,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:52,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2021-10-21 19:27:52,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213290998] [2021-10-21 19:27:52,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:27:52,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:52,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:27:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:27:52,510 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:27:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:52,859 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2021-10-21 19:27:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:27:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-10-21 19:27:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:52,862 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:27:52,862 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:27:52,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:27:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:27:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 91. [2021-10-21 19:27:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 80 states have internal predecessors, (89), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:27:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-10-21 19:27:52,868 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 43 [2021-10-21 19:27:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:52,869 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-10-21 19:27:52,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:27:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-10-21 19:27:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:27:52,870 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:52,870 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:52,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:53,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:27:53,096 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:53,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:53,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1104126516, now seen corresponding path program 1 times [2021-10-21 19:27:53,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:53,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733650665] [2021-10-21 19:27:53,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:53,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:53,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:53,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:27:53,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:53,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733650665] [2021-10-21 19:27:53,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733650665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:53,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103530806] [2021-10-21 19:27:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:53,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:53,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:53,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:53,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:27:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:27:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:53,488 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:27:53,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:27:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:27:53,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103530806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:53,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:53,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-10-21 19:27:53,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906096843] [2021-10-21 19:27:53,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:27:53,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:27:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:27:53,934 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 12 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:27:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:54,200 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-10-21 19:27:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:27:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2021-10-21 19:27:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:54,202 INFO L225 Difference]: With dead ends: 116 [2021-10-21 19:27:54,202 INFO L226 Difference]: Without dead ends: 116 [2021-10-21 19:27:54,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:27:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-21 19:27:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-10-21 19:27:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:27:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-10-21 19:27:54,208 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 44 [2021-10-21 19:27:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:54,208 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-10-21 19:27:54,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:27:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-10-21 19:27:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:27:54,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:54,210 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:54,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:54,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:27:54,424 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:54,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2073773289, now seen corresponding path program 2 times [2021-10-21 19:27:54,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:54,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935496803] [2021-10-21 19:27:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:54,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:54,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:54,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:54,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:54,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:27:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:27:54,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:54,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935496803] [2021-10-21 19:27:54,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935496803] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:54,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594919840] [2021-10-21 19:27:54,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:27:54,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:54,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:54,546 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:54,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:27:54,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:27:54,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:54,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:27:54,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:54,771 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:27:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 19:27:54,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-10-21 19:27:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:27:55,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594919840] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:55,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:55,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2021-10-21 19:27:55,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456214149] [2021-10-21 19:27:55,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:27:55,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:27:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:27:55,400 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:27:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:55,502 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2021-10-21 19:27:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:27:55,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2021-10-21 19:27:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:55,504 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:27:55,505 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:27:55,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:27:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:27:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-10-21 19:27:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 78 states have (on average 1.141025641025641) internal successors, (89), 81 states have internal predecessors, (89), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:27:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-10-21 19:27:55,510 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 47 [2021-10-21 19:27:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:55,510 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-10-21 19:27:55,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:27:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-10-21 19:27:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:27:55,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:55,512 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:55,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:55,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:27:55,723 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1444841842, now seen corresponding path program 1 times [2021-10-21 19:27:55,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:55,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805468510] [2021-10-21 19:27:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:55,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:55,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:55,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:27:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:27:55,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:55,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805468510] [2021-10-21 19:27:55,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805468510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:55,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210787487] [2021-10-21 19:27:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:55,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:55,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:55,819 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:55,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:27:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:27:56,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:27:56,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210787487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:56,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:56,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-21 19:27:56,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035752020] [2021-10-21 19:27:56,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:27:56,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:27:56,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:27:56,259 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:27:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:56,666 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2021-10-21 19:27:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:27:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 56 [2021-10-21 19:27:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:56,668 INFO L225 Difference]: With dead ends: 136 [2021-10-21 19:27:56,668 INFO L226 Difference]: Without dead ends: 130 [2021-10-21 19:27:56,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:27:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-21 19:27:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2021-10-21 19:27:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 94 states have internal predecessors, (103), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:27:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-10-21 19:27:56,674 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 56 [2021-10-21 19:27:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:56,674 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-10-21 19:27:56,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:27:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-10-21 19:27:56,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-21 19:27:56,675 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:56,676 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:56,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:56,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:27:56,900 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:56,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1868655978, now seen corresponding path program 3 times [2021-10-21 19:27:56,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:56,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993363647] [2021-10-21 19:27:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:56,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:57,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:57,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:57,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:27:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 76 proven. 35 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:27:57,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:57,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993363647] [2021-10-21 19:27:57,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993363647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:57,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726099808] [2021-10-21 19:27:57,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:27:57,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:57,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:57,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:57,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:27:57,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:27:57,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:27:57,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 78 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-21 19:27:57,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726099808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:57,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:57,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 18 [2021-10-21 19:27:57,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781432323] [2021-10-21 19:27:57,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:27:57,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:27:57,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:27:57,682 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:27:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:58,172 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2021-10-21 19:27:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:27:58,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 74 [2021-10-21 19:27:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:58,175 INFO L225 Difference]: With dead ends: 154 [2021-10-21 19:27:58,175 INFO L226 Difference]: Without dead ends: 154 [2021-10-21 19:27:58,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:27:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-21 19:27:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2021-10-21 19:27:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 120 states have internal predecessors, (130), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-21 19:27:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2021-10-21 19:27:58,183 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 74 [2021-10-21 19:27:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:58,183 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2021-10-21 19:27:58,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:27:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2021-10-21 19:27:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-21 19:27:58,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:58,185 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:27:58,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:58,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:27:58,411 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash 241209475, now seen corresponding path program 2 times [2021-10-21 19:27:58,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:58,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438840224] [2021-10-21 19:27:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:58,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:58,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:58,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:27:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:58,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:27:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:58,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-21 19:27:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:58,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-21 19:27:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 97 proven. 49 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-21 19:27:58,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:58,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438840224] [2021-10-21 19:27:58,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438840224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:58,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575449039] [2021-10-21 19:27:58,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:27:58,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:58,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:58,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:58,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:27:58,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:27:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:58,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:27:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:58,917 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:27:58,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-10-21 19:27:59,133 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:27:59,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-10-21 19:27:59,466 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:27:59,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-10-21 19:27:59,878 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:27:59,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-10-21 19:28:00,347 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:28:00,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-10-21 19:28:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-10-21 19:28:00,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575449039] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:28:00,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:28:00,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2021-10-21 19:28:00,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48851703] [2021-10-21 19:28:00,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:28:00,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:28:00,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:28:00,870 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:28:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:00,952 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2021-10-21 19:28:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:28:00,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 103 [2021-10-21 19:28:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:00,954 INFO L225 Difference]: With dead ends: 133 [2021-10-21 19:28:00,954 INFO L226 Difference]: Without dead ends: 115 [2021-10-21 19:28:00,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:28:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-21 19:28:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-21 19:28:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-21 19:28:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2021-10-21 19:28:00,959 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 103 [2021-10-21 19:28:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:00,959 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2021-10-21 19:28:00,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:28:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2021-10-21 19:28:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-21 19:28:00,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:00,961 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:01,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:01,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:01,181 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:28:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:01,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1112349080, now seen corresponding path program 1 times [2021-10-21 19:28:01,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:01,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462577751] [2021-10-21 19:28:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:01,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:28:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:01,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:28:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:01,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:28:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:28:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:01,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-21 19:28:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:01,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-10-21 19:28:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 97 proven. 49 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-10-21 19:28:01,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:01,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462577751] [2021-10-21 19:28:01,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462577751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:01,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538488583] [2021-10-21 19:28:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:01,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:01,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:01,321 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:01,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:28:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:01,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:28:01,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 194 proven. 7 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-21 19:28:02,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538488583] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:02,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:02,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-10-21 19:28:02,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350443079] [2021-10-21 19:28:02,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:28:02,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:28:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:28:02,054 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-21 19:28:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:02,328 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2021-10-21 19:28:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:28:02,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 104 [2021-10-21 19:28:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:02,330 INFO L225 Difference]: With dead ends: 133 [2021-10-21 19:28:02,330 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:28:02,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:28:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:28:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-10-21 19:28:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-21 19:28:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-10-21 19:28:02,336 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 104 [2021-10-21 19:28:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:02,336 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-10-21 19:28:02,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-21 19:28:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-10-21 19:28:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-21 19:28:02,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:02,338 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:02,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:02,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:02,544 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:28:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1053830302, now seen corresponding path program 2 times [2021-10-21 19:28:02,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:02,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101805963] [2021-10-21 19:28:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:02,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:02,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:28:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:02,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:28:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:02,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:28:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:28:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:02,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-21 19:28:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:02,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-10-21 19:28:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-10-21 19:28:02,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:02,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101805963] [2021-10-21 19:28:02,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101805963] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:02,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17018584] [2021-10-21 19:28:02,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:28:02,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:02,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:02,673 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:02,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:28:03,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:28:03,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:28:03,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 189 proven. 18 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-10-21 19:28:03,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17018584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:03,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:03,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-10-21 19:28:03,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446987941] [2021-10-21 19:28:03,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:28:03,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:28:03,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:28:03,470 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-10-21 19:28:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:03,895 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2021-10-21 19:28:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:28:03,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 114 [2021-10-21 19:28:03,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:03,897 INFO L225 Difference]: With dead ends: 146 [2021-10-21 19:28:03,897 INFO L226 Difference]: Without dead ends: 143 [2021-10-21 19:28:03,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:28:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-21 19:28:03,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2021-10-21 19:28:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-21 19:28:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2021-10-21 19:28:03,907 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 114 [2021-10-21 19:28:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:03,908 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2021-10-21 19:28:03,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-10-21 19:28:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2021-10-21 19:28:03,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-10-21 19:28:03,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:28:03,912 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:28:03,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:04,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:04,135 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:28:04,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:28:04,136 INFO L82 PathProgramCache]: Analyzing trace with hash -491360571, now seen corresponding path program 3 times [2021-10-21 19:28:04,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:28:04,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553251238] [2021-10-21 19:28:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:28:04,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:28:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:04,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:28:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:04,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:28:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:04,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:28:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:04,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:28:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:04,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-10-21 19:28:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-10-21 19:28:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:04,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-10-21 19:28:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:28:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-10-21 19:28:04,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:28:04,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553251238] [2021-10-21 19:28:04,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553251238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:04,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927210837] [2021-10-21 19:28:04,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:28:04,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:04,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:28:04,297 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:28:04,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:28:04,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:28:04,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:28:04,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:28:04,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:28:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-10-21 19:28:05,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927210837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:28:05,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:28:05,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2021-10-21 19:28:05,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917751475] [2021-10-21 19:28:05,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:28:05,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:28:05,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:28:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:28:05,245 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:28:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:28:05,518 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2021-10-21 19:28:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:28:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 150 [2021-10-21 19:28:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:28:05,519 INFO L225 Difference]: With dead ends: 143 [2021-10-21 19:28:05,519 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:28:05,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:28:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:28:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:28:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:28:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:28:05,520 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 150 [2021-10-21 19:28:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:28:05,521 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:28:05,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-21 19:28:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:28:05,521 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:28:05,524 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX [2021-10-21 19:28:05,524 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION [2021-10-21 19:28:05,524 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION [2021-10-21 19:28:05,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:28:05,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:28:05,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:28:05,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:28:05,525 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:28:05,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:28:05,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:28:05,741 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:28:05,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:28:05 BoogieIcfgContainer [2021-10-21 19:28:05,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:28:05,743 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:28:05,744 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:28:05,744 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:28:05,748 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:27:43" (3/4) ... [2021-10-21 19:28:05,753 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:28:05,760 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:28:05,760 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-10-21 19:28:05,761 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:28:05,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-21 19:28:05,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-21 19:28:05,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-21 19:28:05,766 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:28:05,792 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:28:05,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:28:05,793 INFO L168 Benchmark]: Toolchain (without parser) took 23182.84 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 63.0 MB in the beginning and 97.6 MB in the end (delta: -34.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:05,794 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 96.5 MB. Free memory is still 52.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:28:05,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.65 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 62.9 MB in the beginning and 97.5 MB in the end (delta: -34.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:05,795 INFO L168 Benchmark]: Boogie Preprocessor took 38.05 ms. Allocated memory is still 121.6 MB. Free memory was 97.5 MB in the beginning and 96.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:05,795 INFO L168 Benchmark]: RCFGBuilder took 469.75 ms. Allocated memory is still 121.6 MB. Free memory was 96.2 MB in the beginning and 85.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:05,795 INFO L168 Benchmark]: TraceAbstraction took 22310.44 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 85.0 MB in the beginning and 100.7 MB in the end (delta: -15.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:05,796 INFO L168 Benchmark]: Witness Printer took 49.03 ms. Allocated memory is still 146.8 MB. Free memory was 100.7 MB in the beginning and 97.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:28:05,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 96.5 MB. Free memory is still 52.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.65 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 62.9 MB in the beginning and 97.5 MB in the end (delta: -34.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.05 ms. Allocated memory is still 121.6 MB. Free memory was 97.5 MB in the beginning and 96.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 469.75 ms. Allocated memory is still 121.6 MB. Free memory was 96.2 MB in the beginning and 85.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22310.44 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 85.0 MB in the beginning and 100.7 MB in the end (delta: -15.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. * Witness Printer took 49.03 ms. Allocated memory is still 146.8 MB. Free memory was 100.7 MB in the beginning and 97.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 22180.1ms, OverallIterations: 21, TraceHistogramMax: 14, EmptinessCheckTime: 71.6ms, AutomataDifference: 4845.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 501 SDtfs, 1619 SDslu, 1187 SDs, 0 SdLazy, 3376 SolverSat, 402 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2535.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1255 GetRequests, 972 SyntacticMatches, 24 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 2849.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=17, InterpolantAutomatonStates: 193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 193.7ms AutomataMinimizationTime, 21 MinimizatonAttempts, 226 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 209.8ms SsaConstructionTime, 745.7ms SatisfiabilityAnalysisTime, 9372.9ms InterpolantComputationTime, 1919 NumberOfCodeBlocks, 1657 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1882 ConstructedInterpolants, 144 QuantifiedInterpolants, 7467 SizeOfPredicates, 35 NumberOfNonLiveVariables, 2435 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 37 InterpolantComputations, 8 PerfectInterpolantSequences, 3433/3844 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:28:05,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a47cdf2-bf55-4ef1-8253-d03a6c848534/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...